JP2000202467A - Photocatalyst, its utilization and water treating device - Google Patents
Photocatalyst, its utilization and water treating deviceInfo
- Publication number
- JP2000202467A JP2000202467A JP466299A JP466299A JP2000202467A JP 2000202467 A JP2000202467 A JP 2000202467A JP 466299 A JP466299 A JP 466299A JP 466299 A JP466299 A JP 466299A JP 2000202467 A JP2000202467 A JP 2000202467A
- Authority
- JP
- Japan
- Prior art keywords
- photocatalyst
- water
- light
- shape
- treatment apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 105
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 26
- 239000010936 titanium Substances 0.000 claims description 7
- 230000001678 irradiating effect Effects 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 17
- 235000012489 doughnuts Nutrition 0.000 abstract description 2
- 239000008400 supply water Substances 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 description 15
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 229910010413 TiO 2 Inorganic materials 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000003213 activating effect Effects 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- LFYXNXGVLGKVCJ-FBIMIBRVSA-N 2-methylisoborneol Chemical compound C1C[C@@]2(C)[C@](C)(O)C[C@@H]1C2(C)C LFYXNXGVLGKVCJ-FBIMIBRVSA-N 0.000 description 3
- LFYXNXGVLGKVCJ-UHFFFAOYSA-N 2-methylisoborneol Natural products C1CC2(C)C(C)(O)CC1C2(C)C LFYXNXGVLGKVCJ-UHFFFAOYSA-N 0.000 description 3
- GZSOSUNBTXMUFQ-NJGQXECBSA-N 5,7,3'-Trihydroxy-4'-methoxyflavone 7-O-rutinoside Natural products O(C[C@@H]1[C@@H](O)[C@H](O)[C@@H](O)[C@H](Oc2cc(O)c3C(=O)C=C(c4cc(O)c(OC)cc4)Oc3c2)O1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@H](C)O1 GZSOSUNBTXMUFQ-NJGQXECBSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000001877 deodorizing effect Effects 0.000 description 3
- GZSOSUNBTXMUFQ-YFAPSIMESA-N diosmin Chemical compound C1=C(O)C(OC)=CC=C1C(OC1=C2)=CC(=O)C1=C(O)C=C2O[C@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO[C@H]2[C@@H]([C@H](O)[C@@H](O)[C@H](C)O2)O)O1 GZSOSUNBTXMUFQ-YFAPSIMESA-N 0.000 description 3
- 229960004352 diosmin Drugs 0.000 description 3
- IGBKNLGEMMEWKD-UHFFFAOYSA-N diosmin Natural products COc1ccc(cc1)C2=C(O)C(=O)c3c(O)cc(OC4OC(COC5OC(C)C(O)C(O)C5O)C(O)C(O)C4O)cc3O2 IGBKNLGEMMEWKD-UHFFFAOYSA-N 0.000 description 3
- DTGKSKDOIYIVQL-UHFFFAOYSA-N dl-isoborneol Natural products C1CC2(C)C(O)CC1C2(C)C DTGKSKDOIYIVQL-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- VUYDGVRIQRPHFX-UHFFFAOYSA-N hesperidin Natural products COc1cc(ccc1O)C2CC(=O)c3c(O)cc(OC4OC(COC5OC(O)C(O)C(O)C5O)C(O)C(O)C4O)cc3O2 VUYDGVRIQRPHFX-UHFFFAOYSA-N 0.000 description 3
- -1 iO 2 Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 229910002367 SrTiO Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000000796 flavoring agent Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 2
- GNRSAWUEBMWBQH-UHFFFAOYSA-N nickel(II) oxide Inorganic materials [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001699 photocatalysis Effects 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- WCVOGSZTONGSQY-UHFFFAOYSA-N 2,4,6-trichloroanisole Chemical compound COC1=C(Cl)C=C(Cl)C=C1Cl WCVOGSZTONGSQY-UHFFFAOYSA-N 0.000 description 1
- 229910017115 AlSb Inorganic materials 0.000 description 1
- 102100032566 Carbonic anhydrase-related protein 10 Human genes 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910005542 GaSb Inorganic materials 0.000 description 1
- 101000867836 Homo sapiens Carbonic anhydrase-related protein 10 Proteins 0.000 description 1
- 229910000673 Indium arsenide Inorganic materials 0.000 description 1
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 1
- 229910002370 SrTiO3 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- WPYVAWXEWQSOGY-UHFFFAOYSA-N indium antimonide Chemical compound [Sb]#[In] WPYVAWXEWQSOGY-UHFFFAOYSA-N 0.000 description 1
- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052961 molybdenite Inorganic materials 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000007539 photo-oxidation reaction Methods 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910000108 silver(I,III) oxide Inorganic materials 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten(VI) oxide Inorganic materials O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Landscapes
- Physical Water Treatments (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Catalysts (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光触媒を用いた水
処理装置及び方法に関し、特に固定化光触媒を用いた水
処理装置及び方法に関する。The present invention relates to a water treatment apparatus and method using a photocatalyst, and more particularly to a water treatment apparatus and method using an immobilized photocatalyst.
【０００２】[0002]
【従来の技術】従来、各種産業廃水、都市下水、上水等
の水を光触媒によって処理し、水中の有機物を酸化分解
して脱色、脱臭、殺菌を行う水処理装置及び方法が知ら
れている。例えば、特開平６−１７０３６０号公報に
は、水に溶解している2−メチルイソボルネオールまた
はジオスミンのような異臭味物質を、自熱灯、水銀灯、
蛍光灯、殺菌等の光触媒を励起し得る光源からの光をＴ
ｉＯ２、ＺｎＯ、ＳｒＴｉＯ３等の光触媒に照射するこ
とにより分解させる異臭味物質の分解方法が開示されて
いる。また、特開平３−１９３１９１号公報には、紫外
線を照射した光触媒層に水を接触させることにより、水
中の有機物質を酸化分解して、飲料水のかび臭の原因物
質であるジオスミンや2−ＭＩＢ、トリハロメタン、そ
の他の有機物質を分解することにより水の脱臭処理及び
発ガン性物質の除去を行うことが開示されている。2. Description of the Related Art Conventionally, there have been known water treatment apparatuses and methods for treating various types of industrial wastewater, municipal sewage, and tap water with a photocatalyst and oxidatively decomposing organic substances in the water to decolorize, deodorize, and sterilize. . For example, Japanese Patent Application Laid-Open No. 6-170360 discloses that an off-flavor substance such as 2-methylisoborneol or diosmin dissolved in water is heated with a self-heating lamp, a mercury lamp,
Light from a light source capable of exciting a photocatalyst such as a fluorescent
There is disclosed a method for decomposing an off-flavor substance which is decomposed by irradiating a photocatalyst such as iO 2 , ZnO, SrTiO 3 or the like. Japanese Unexamined Patent Publication (Kokai) No. 3-193191 discloses that, when water is brought into contact with a photocatalyst layer irradiated with ultraviolet rays, organic substances in water are oxidized and decomposed, and diosmin and 2-MIB, which are substances causing the musty odor of drinking water, are disclosed. , Trihalomethane, and other organic substances are decomposed to remove water and remove carcinogenic substances.
【０００３】さらに、特開平４−４５８９６号公報には
水中から遊離塩素、トリハロメタンなどの有機物を除去
する光触媒反応器として、紫外線発生器と光触媒反応を
伴う半導体物質で構成され、半導体物質としてアナター
ゼ型酸化チタン・ルチル型酸化チタン・酸化タングステ
ン・酸化すず・酸化亜鉛、あるいはこれらの混合物を用
いたものが開示されている。Further, JP-A-4-45896 discloses a photocatalytic reactor for removing organic substances such as free chlorine and trihalomethane from water, which comprises an ultraviolet ray generator and a semiconductor substance accompanied by a photocatalytic reaction. A material using titanium oxide, rutile type titanium oxide, tungsten oxide, tin oxide, zinc oxide, or a mixture thereof is disclosed.
【０００４】一方、特公平２−５５１１７号公報には、
水を、ｐＨ８以下で過酸化物の存在下に反応装置の下部
から空気又は酸素を吹き込みながら光照射されている光
触媒で処理することを特徴とする光触媒による水の処理
方法及び脱色、脱臭、殺菌を行う方法が開示されてい
る。On the other hand, Japanese Patent Publication No. 2-55117 discloses that
Water is treated with a photocatalyst which is irradiated with light while blowing air or oxygen from the lower part of the reactor in the presence of a peroxide at a pH of 8 or less, and a method for treating water with a photocatalyst, and decolorization, deodorization, and sterilization. Is disclosed.
【０００５】[0005]
【発明が解決しようとする課題】光触媒は通常粒径がｎ
ｍ単位の小さい粉体であるため、水処理に使用するため
には分離の容易な形態として用いることが望ましい。そ
のため従来技術においても焼結等により数ｍｍ程度の粒
径にしたものや、セラミックペーパーに光触媒と白金等
の金属を旦持するなど、支持体上に固定した状態で使用
する場合が多い。The photocatalyst usually has a particle size of n.
Since it is a small powder of m units, it is desirable to use it as a form that is easily separated for use in water treatment. For this reason, in the prior art, it is often used in a state of being fixed on a support such as one having a particle size of about several mm by sintering or the like, or holding a photocatalyst and a metal such as platinum on ceramic paper.
【０００６】光触媒を支持体に比較的強固に固定する方
法としては、光触媒の粉末を接着剤などにより支持体に
固定する方法、光触媒を分散した液体を支持体に塗布し
た後焼き付ける方法などがあるが、プラスチック、ガラ
ス、セラミックなどの支持体と光触媒層の間には何らか
の接着層が介在することになり、水処理のように大きな
応力のかかる処理においては剥離が起こりやすい。処理
後の水に触媒や接着材などが混入することは品質上好ま
しくない。As a method of fixing the photocatalyst to the support relatively firmly, there are a method of fixing the photocatalyst powder to the support with an adhesive or the like, and a method of applying a liquid in which the photocatalyst is dispersed to the support and baking it. However, some kind of adhesive layer is interposed between the support such as plastic, glass, and ceramic and the photocatalyst layer, and peeling is likely to occur in a process in which a large stress is applied such as a water process. It is not preferable in terms of quality that a catalyst, an adhesive, and the like are mixed in the treated water.
【０００７】一方、金属支持体の表面を処理して表面部
分を光触媒化することにより、固定化光触媒を生成する
方法もあり、この方法では上述の接着層が存在せず、支
持体と表面層との明確な境界もないため、非常に強固な
固定化を実現することができ、剥離防止の面からは好ま
しい。しかしながら、支持体が光を透過しない金属であ
るため、直接光が届いた部分しか触媒として利用でき
ず、活性の面で問題があった。On the other hand, there is also a method of producing an immobilized photocatalyst by treating the surface of a metal support and photocatalyzing the surface portion. In this method, the above-mentioned adhesive layer does not exist, and the support and the surface layer are not provided. Since there is no clear boundary with the above, very strong fixing can be realized, which is preferable from the viewpoint of preventing peeling. However, since the support is made of a metal that does not transmit light, only a portion directly irradiated with light can be used as a catalyst, and there is a problem in terms of activity.
【０００８】本発明の目的は、光触媒を安全かつ効率よ
く使用できる光触媒使用方法及び水処理装置を提供する
ことにある。An object of the present invention is to provide a method for using a photocatalyst and a water treatment apparatus which can use the photocatalyst safely and efficiently.
【０００９】[0009]
【課題を解決するための手段】すなわち、本発明の要旨
は貫通孔を有する形状或いはコイル状、コルゲート状を
有することを特徴とする光触媒に存する。また、本発明
の別の要旨は、光により活性化する光触媒を、光透過物
質と混合して用いることを特徴とする光触媒の使用方法
に存する。That is, the gist of the present invention resides in a photocatalyst characterized by having a shape having a through-hole, a coil shape, or a corrugated shape. Another aspect of the present invention resides in a method for using a photocatalyst, wherein a photocatalyst activated by light is mixed with a light transmitting substance and used.
【００１０】また、本発明の別の要旨は、被処理水を光
触媒の表面に接触させて処理する水処理装置であって、
被処理水を流入する入水口と、処理後の被処理水を排出
する吐水口とを有し、少なくとも光触媒と光透過物質と
の混合物が充填された本体部と、光触媒を所定の波長を
有する光で照射する光源とを有することを特徴とする水
処理装置に存する。Another aspect of the present invention is a water treatment apparatus for treating water to be treated by contacting the water with a surface of a photocatalyst,
It has a water inlet for inflowing the water to be treated, a water outlet for discharging the water to be treated, and a main body filled with a mixture of at least a photocatalyst and a light transmitting substance, and the photocatalyst having a predetermined wavelength. A light source for irradiating with light.
【００１１】また、本発明の別の要旨は、被処理水を光
触媒の表面に接触させて処理する水処理装置であって、
被処理水を流入する入水口と、処理後の被処理水を排出
する吐水口とを有し、少なくとも光触媒が充填された本
体部と、光触媒を所定の波長を有する光で照射する光源
とを有し、光触媒が、貫通孔を有する形状或いはコイル
状或いはコルゲート状のいずれかの形状を有することを
特徴とする水処理装置に存する。Another aspect of the present invention is a water treatment apparatus for treating water to be treated by bringing the water into contact with the surface of a photocatalyst,
A water inlet for inflowing the water to be treated, a water outlet for discharging the water to be treated, and a main body filled with at least a photocatalyst, and a light source for irradiating the photocatalyst with light having a predetermined wavelength. The water treatment apparatus according to claim 1, wherein the photocatalyst has a shape having a through hole, or a shape of a coil or a corrugate.
【００１２】[0012]
【発明の実施の形態】以下、本発明を更に詳細に説明す
る。本発明において使用可能な光触媒としては、Ｓｅ，
Ｇｅ，Ｓｉ，Ｔｉ，Ｚｎ，Ｃｕ，Ａｌ，Ｓｎ，Ｇａ，Ｉ
ｎ，Ｐ，Ａｓ，Ｓｂ，Ｃ，Ｃｄ，Ｓ，Ｔｅ，Ｎｉ，Ｆ
ｅ，Ｃｏ，Ａｇ，Ｍｏ，Ｓｒ，Ｗ，Ｃｒ，Ｂａ，Ｐｂの
いずれか、又はこれらの化合物、又は合金、又は酸化物
が好ましく、これらは単独で、又二種類以上を複合して
用いることができる。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. Photocatalysts usable in the present invention include Se,
Ge, Si, Ti, Zn, Cu, Al, Sn, Ga, I
n, P, As, Sb, C, Cd, S, Te, Ni, F
e, Co, Ag, Mo, Sr, W, Cr, Ba, or Pb, or a compound, alloy, or oxide thereof is preferable. These may be used alone or in combination of two or more. Can be.
【００１３】例えば、単独ではＳｉ，Ｇｅ，Ｓｅ、化合
物としてはＡｌＰ，ＡｌＡｓ．ＧａＰ，ＡｌＳｂ，Ｇａ
Ａｓ，ＩｎＰ，ＧａＳｂ，ＩｎＡｓ，ＩｎＳｂ，ＩｎＰ
ｂ，ＣｄＳ，ＣｄＳｅ，ＺｎＳ，ＭｏＳ２，ＷＴｅ２，
ＳｉＣ，Ｃｒ２Ｔｅ３，ＭｏＴｅ，Ｃｕ２Ｓ，ＷＳ２、
酸化物としてはＴｉＯ２，Ｂｉ２Ｏ３，ＣｕＯ，Ｃｕ ２
Ｏ，ＺｎＯ，ＭｏＯ３，ＩｎＯ３，Ａｇ２Ｏ，ＰｂＯ，
ＳｒＴｉＯ３，ＢａＴｉＯ３，Ｃｏ３Ｏ４，Ｔａ
２Ｏ５，ＷＯ３，ＳｎＯ２，Ｆｅ２Ｏ３，Ｋ２Ｎｂ
Ｏ ３，ＣｅＯ２，ＮｉＯ等を例示することができる。ま
た、これらの光触媒粉末にＰｔ，Ｒｈ，ＲｕＯ２，Ｎ
ｂ，Ｃｕ，Ｓｎ，ＮｉＯなどの金属及び金属酸化物を担
持したものを用いることもできる。For example, alone, Si, Ge, Se, a compound
The materials include AlP, AlAs. GaP, AlSb, Ga
As, InP, GaSb, InAs, InSb, InP
b, CdS, CdSe, ZnS, MoS2, WTe2,
SiC, Cr2Te3, MoTe, Cu2S, WS2,
TiO as oxide2, Bi2O3, CuO, Cu 2
O, ZnO, MoO3, InO3, Ag2O, PbO,
SrTiO3, BaTiO3, Co3O4, Ta
2O5, WO3, SnO2, Fe2O3, K2Nb
O 3, CeO2, NiO and the like. Ma
In addition, Pt, Rh, RuO2, N
b, Cu, Sn, NiO and other metals and metal oxides
You can also use what you have.
【００１４】これらの中でも、光触媒活性、安全性、入
手容易性などの条件から、ＴｉＯ２，ＳｒＴｉＯ３など
が好ましい。Among these, TiO 2 , SrTiO 3 and the like are preferable in terms of photocatalytic activity, safety, availability and the like.
【００１５】本発明において光触媒の形状には特に制限
はないが、被処理水との接触面積が大きい形状が好まし
く、多孔質な球状、ドーナツ状、網目状、ハニカム状
（蜂の巣の断面のような網状構造）等の貫通孔を有する
形状、コイル状、コルゲート状（段ボールの断面形状の
ような構造）などが好ましい。網目状、コイル状、ハニ
カム状、コルゲート状など、充填方向によって水との実
質的な表面積が変化する場合には、実効面積が大きくな
るように充填することが好ましい。すなわち、これら形
状を板状と見なせば、板の最大面が水の通過方向と並行
にならないように、換言すれば水の通過方向と直交する
断面積が最小とならないように充填することが好まし
く、板の最大面が水の通過方向と直交する様に充填する
ことが特に好ましい。このような形状の光触媒を用いる
場合には、数ｍｍ角程度の小片に加工すると充填可能な
触媒の量と実効面積が大きくなるため好ましい。In the present invention, the shape of the photocatalyst is not particularly limited, but is preferably a shape having a large contact area with the water to be treated, and is preferably a porous sphere, donut, mesh, honeycomb (such as a honeycomb cross section). A shape having a through hole such as a net-like structure, a coil shape, a corrugated shape (a structure like a cross-sectional shape of a corrugated cardboard), or the like is preferable. When the substantial surface area with water changes depending on the filling direction, such as a mesh shape, a coil shape, a honeycomb shape, or a corrugated shape, it is preferable that the filling be performed so as to increase the effective area. That is, if these shapes are regarded as plate-like, filling is performed so that the largest surface of the plate is not parallel to the water passage direction, in other words, the cross-sectional area orthogonal to the water passage direction is not minimized. It is particularly preferable to fill the plate so that the largest surface of the plate is perpendicular to the direction of water passage. When a photocatalyst having such a shape is used, it is preferable to process the photocatalyst into small pieces of about several mm square because the amount of the catalyst that can be filled and the effective area increase.
【００１６】本発明において光触媒はそれ自身を焼結す
る等の方法で形成することもできるが、触媒の効率や被
処理水との分離、取り扱いの容易さなどの点から、何ら
かの支持体へ固定化して用いることが好ましい。In the present invention, the photocatalyst can be formed by a method such as sintering itself. However, from the viewpoint of the efficiency of the catalyst, the separation from the water to be treated and the ease of handling, the photocatalyst is fixed to any support. It is preferable to use it after conversion.
【００１７】光触媒の固定化方法としては従来の方法を
用いることができるが、処理時に触媒に対して加わる応
力が大きいことから、剥離や脱落などが起こりにくい方
法を用いることが好ましく、具体的には、金属支持体の
表面処理によって支持体表面を光触媒化する方法などを
用いることが好ましい。Conventional methods can be used for fixing the photocatalyst. However, it is preferable to use a method in which peeling or falling off does not easily occur because the stress applied to the catalyst during treatment is large. It is preferable to use a method of photocatalyzing the surface of the support by surface treatment of the metal support.
【００１８】本発明において光触媒を活性化するために
用いられる光源としては、用いる光触媒を励起し得る光
源たとえば、自熱灯などのフィラメントランプ、水銀
灯、水素放電管、キセノン灯などの高輝度放電灯、蛍光
灯、プラックライト、紫外線ランプ、殺菌灯などの蛍光
灯類、レーザー光源などの人工光源または、太陽光の自
然光源を用いることができる。また２種類以上の光源を
組み合わせて使用することもできる。光源は光触媒の吸
収がよく、かつ後述する光透過物質の透過性が高い波長
を有するものを選択すればよい。処理速度の点からは紫
外線ランプを用いることが好ましい。In the present invention, the light source used for activating the photocatalyst is a light source capable of exciting the photocatalyst used, for example, a filament lamp such as a self-heating lamp, a high-intensity discharge lamp such as a mercury lamp, a hydrogen discharge tube, or a xenon lamp. Fluorescent lamps such as fluorescent lamps, plaque lights, ultraviolet lamps, and germicidal lamps; artificial light sources such as laser light sources; and natural light sources of sunlight can be used. Also, two or more types of light sources can be used in combination. As the light source, a light source having a wavelength that has a high absorption of the photocatalyst and a high transmittance of a light transmitting substance described later may be used. From the viewpoint of processing speed, it is preferable to use an ultraviolet lamp.
【００１９】例えば光触媒としてＴｉＯ２を用いる場合
には、光吸収が近紫外部にあるため近紫外部の出力波長
を有する紫外線ランプを用いることができる。For example, when TiO 2 is used as a photocatalyst, an ultraviolet lamp having an output wavelength of near ultraviolet can be used because the light absorption is near ultraviolet.
【００２０】光源の大きさや形状は任意だが、カラムな
どに光源と光触媒、光透過物質を充填する場合などにお
いては、発光量が大きく、かつ、光触媒に対する発光面
積が大きい光源が好ましい。また、耐熱衝撃性、処理応
力への耐性なども要求される。Although the size and shape of the light source are arbitrary, when the column or the like is filled with the light source, a photocatalyst, or a light transmitting substance, a light source having a large light emission amount and a large light emission area with respect to the photocatalyst is preferable. Further, thermal shock resistance, resistance to processing stress, and the like are also required.
【００２１】光源は、光触媒と同一の容器に収納して
も、一方、光源が発生する光触媒の活性化を促す波長の
光を透過する容器に光触媒を充填し、容器外部に配置し
ても、その両方を組み合わせても良い。The light source may be housed in the same container as the photocatalyst, or on the other hand, the photocatalyst may be filled in a container that transmits light of a wavelength that promotes activation of the photocatalyst generated by the light source, and may be arranged outside the container. You may combine both.
【００２２】本発明において用いる光透過物質は、光源
の光を固定化光触媒に効率よく到達させるために用いら
れ、固定化光触媒とともに容器に充填される。すなわ
ち、光触媒自体には光透過性が無いため、光源から離れ
た位置にある光触媒には光が届きにくく、光触媒の形状
や大きさによっては光源の光が届かず実質的に触媒とし
て使用されていない部分も存在する。そのため、本発明
においては光触媒に光透過物質を混合して用いることに
より、光透過物質が光伝搬路の役目を果たし、光源から
離れた位置にある光触媒の表面にも光を到達させてい
る。光透過物質は、触媒の形状自身が光伝達機能を有す
る場合、例えば上述の網目状、ハニカム状など貫通孔を
有する形状のように、管通孔が実質的に光の伝搬路を形
成可能な場合においては、必ずしも用いる必要がない。The light-transmitting substance used in the present invention is used for efficiently transmitting the light of the light source to the immobilized photocatalyst, and is filled in a container together with the immobilized photocatalyst. That is, since the photocatalyst itself has no light transmittance, light hardly reaches the photocatalyst located at a position distant from the light source, and the light of the light source does not reach depending on the shape and size of the photocatalyst, so that the photocatalyst is substantially used as a catalyst. Some parts are missing. Therefore, in the present invention, by using a light transmitting substance mixed with the photocatalyst, the light transmitting substance plays a role of a light propagation path, and the light reaches the surface of the photocatalyst located at a position away from the light source. In the case where the shape of the catalyst itself has a light transmitting function, for example, the shape of the catalyst has a through hole such as a mesh shape, a honeycomb shape, and the like, the tube through hole can substantially form a light propagation path. In some cases, it is not necessary to use it.
【００２３】光透過物質としては特に制限はないが、光
触媒を活性化し得る波長を持つ光の透過性に優れ、被処
理水に溶解せず、光酸化反応によって分解されず、また
処理時の応力に耐えられる物が好ましい。具体的には石
英、ホウケイ酸などのガラス材料が好ましい。また、ソ
ーダライムガラス等の紫外線透過率は比較的低いけれど
もその表面における紫外線の反射率の高い材料を用いた
場合も、乱反射によって触媒層内部迄、光を到達させる
ことができる。耐薬品性や安全性、光透過性の点から、
ガラス材料を用いることが好ましい。The light-transmitting substance is not particularly limited, but is excellent in light transmittance having a wavelength capable of activating a photocatalyst, does not dissolve in water to be treated, is not decomposed by a photooxidation reaction, and has a stress during treatment. The thing which can withstand is preferred. Specifically, glass materials such as quartz and borosilicate are preferable. Also, when a material having a relatively low ultraviolet transmittance such as soda lime glass but a high ultraviolet reflectance on the surface is used, light can reach the inside of the catalyst layer by irregular reflection. In terms of chemical resistance, safety and light transmission,
It is preferable to use a glass material.
【００２４】光透過物質の形状は任意だが、充填時や使
用時の相互摩擦による破損や剥離などを防止するため、
鋭角な形状で無いことが好ましく、球状であることが特
に好ましい。また、光透過物質の大きさにも特に制限は
ないが、大きすぎると光触媒を充填するスペースを無駄
に消費することになり、また小さすぎると光触媒の表面
に効率よく光源からの光を伝達するという効果が無くな
るため、触媒の形状、大きさによって適宜定めればよ
い。The shape of the light transmitting material is optional, but in order to prevent breakage or peeling due to mutual friction during filling or use,
It is preferable that the shape is not an acute angle, and it is particularly preferable that the shape is spherical. Also, the size of the light transmitting substance is not particularly limited, but if it is too large, space for filling the photocatalyst is wasted, and if it is too small, light from the light source is efficiently transmitted to the surface of the photocatalyst. Therefore, it may be appropriately determined depending on the shape and size of the catalyst.
【００２５】光透過物質と光触媒の混合比は、光透過物
質を加えない場合に比べて同等かそれ以上の除去が実現
できる範囲で、求められる性能に応じて定めればよい
が、例えば光透過物質と光触媒の合計に対する光触媒の
重量比の下限値が５％が好ましく、１５％以上がより好
ましく、３０％以上が更に好ましく、５０％以上である
ことが特に好ましく、６０％以上であることが最も好ま
しい。一方、上限値は１００％未満であることが好まし
く、９８％以下が更に好ましく、９０％以下がより好ま
しく、８５％以下であることが最も好ましい。The mixing ratio between the light transmitting substance and the photocatalyst may be determined in accordance with the required performance within a range in which the removal can be attained to be equal to or higher than the case where no light transmitting substance is added. The lower limit of the weight ratio of the photocatalyst to the total of the substance and the photocatalyst is preferably 5%, more preferably 15% or more, still more preferably 30% or more, particularly preferably 50% or more, and preferably 60% or more. Most preferred. On the other hand, the upper limit is preferably less than 100%, more preferably 98% or less, more preferably 90% or less, and most preferably 85% or less.
【００２６】光触媒と光透過物質をカラム状等の容器に
充填する場合には、通過する水ができるだけ多くの光触
媒の表面に接触して容器内を通過するように充填するこ
とが好ましい。実際には容器、光触媒、光透過物質の形
状及び被処理水の流入口、吐出口の位置などを考慮して
充填する。When the photocatalyst and the light transmitting substance are filled in a column-shaped container or the like, it is preferable to fill the container so that the passing water contacts the surface of the photocatalyst as much as possible and passes through the container. Actually, the filling is performed in consideration of the shape of the container, the photocatalyst, the light transmitting substance, the position of the inlet and the outlet of the water to be treated, and the like.
【００２７】（水処理装置の構成）図１は、本発明によ
る水処理装置を用いた処理システムの一実施形態を示す
図である。処理システムは未処理の原水が溜めてある原
水槽３、少なくとも光触媒が充填された反応槽１、原水
槽３から反応槽１へ原水を送り込むポンプ４、反応槽１
内の光触媒を照射し、活性化する光源５、処理後の水を
溜める処理水槽６から構成されている。本発明において
は、反応槽１（内部の充填物を含む）と光源５をあわせ
て水処理装置と見なす。(Configuration of Water Treatment Apparatus) FIG. 1 is a diagram showing an embodiment of a treatment system using a water treatment apparatus according to the present invention. The treatment system includes a raw water tank 3 storing untreated raw water, a reaction tank 1 filled with at least a photocatalyst, a pump 4 for feeding raw water from the raw water tank 3 to the reaction tank 1, a reaction tank 1
It comprises a light source 5 for irradiating and activating a photocatalyst therein and a treatment water tank 6 for storing water after treatment. In the present invention, the reaction tank 1 (including the internal filling) and the light source 5 are regarded as a water treatment apparatus.
【００２８】図２は、本発明による水処理装置を構成す
る反応槽の一実施形態を示す図である。図において、反
応槽１は、入水口１１及び吐水口１２を有する略円筒状
の本体部１０と、本体部１０の蓋１３と、本体１０に充
填された光触媒１６及び光透過性物質１５とから構成さ
れている。FIG. 2 is a view showing one embodiment of a reaction tank constituting the water treatment apparatus according to the present invention. In the figure, a reaction tank 1 is composed of a substantially cylindrical main body 10 having a water inlet 11 and a water outlet 12, a lid 13 of the main body 10, a photocatalyst 16 and a light transmissive substance 15 filled in the main body 10. It is configured.
【００２９】処理する水は、本体部１０下部に設けられ
た入水口１１から、ポンプ４によって供給される。吐水
口１２には処理水槽６が接続され、入水口１１から流入
した被処理水が吐水口１２から流出するように構成され
ている。図においては入水口１１と吐水口１２が本体部
１０の同じ側に設けられているが、対向する部位に設け
ることもできる。本体部１０は、略円筒形状を有してお
り、本実施形態では光源５が反応槽１の外部に配置され
ているので、少なくとも光触媒の活性化に必要な波長の
光を透過する材料、例えばガラスで形成されている。Water to be treated is supplied by a pump 4 from a water inlet 11 provided at a lower part of the main body 10. The treated water tank 6 is connected to the water discharge port 12, and the water to be treated flowing from the water inlet 11 flows out of the water discharge port 12. In the figure, the water inlet 11 and the water outlet 12 are provided on the same side of the main body 10, but they may be provided at opposing parts. The main body 10 has a substantially cylindrical shape, and in this embodiment, since the light source 5 is disposed outside the reaction tank 1, a material that transmits at least light having a wavelength necessary for activating the photocatalyst, for example, Made of glass.
【００３０】図３は、本発明による水処理装置を構成す
る反応槽の別の実施形態を示す図である。本実施形態
は、本体部１０に光触媒のみを充填し、光触媒１８の形
状を網目状とした以外は図２に示した構成と同一であ
る。FIG. 3 is a view showing another embodiment of the reaction tank constituting the water treatment apparatus according to the present invention. This embodiment is the same as the configuration shown in FIG. 2 except that the main body 10 is filled with only the photocatalyst and the shape of the photocatalyst 18 is meshed.
【００３１】図４及び図５は、本発明による水処理装置
を構成する反応槽の更に別の実施形態を示す図である。
これら実施形態においては、光源２０を反応槽１の内部
に配置した点が図２及び図３に示した構成と異なる。光
源２０は略棒状で、本体部１０の底面近くまで発光部が
到達している。光源２０は蓋１３に接続された図示しな
い電源により駆動される。FIGS. 4 and 5 show still another embodiment of the reaction tank constituting the water treatment apparatus according to the present invention.
These embodiments differ from the configurations shown in FIGS. 2 and 3 in that the light source 20 is disposed inside the reaction tank 1. The light source 20 has a substantially rod shape, and the light emitting section reaches near the bottom surface of the main body 10. The light source 20 is driven by a power supply (not shown) connected to the lid 13.
【００３２】[0032]
【実施例】（実施例１〜３、比較例１〜２）図１に示し
た構成の処理システムにおいて、図２構成の反応槽を用
い、以下に示す環境で、光触媒と光透過物質の量を表１
に示すように変化させて水処理を行った。EXAMPLES (Examples 1 to 3 and Comparative Examples 1 and 2) In a processing system having the structure shown in FIG. 1, the amounts of the photocatalyst and the light transmitting substance were measured in the following environment using the reaction tank having the structure shown in FIG. Table 1
The water treatment was carried out with the changes as shown in FIG.
【００３３】光触媒：ＳＰＡＲＫＴ（（株）神戸製鋼所
製）。球状Ｔｉ表面を酸化し、表面部分をＴｉＯ２とし
た固定化光触媒（直径２ｍｍ）。 光透過物質：ガラスビーズ（直径３ｍｍ）。 光源：紫外線ランプ（直径１８ｍｍ、波長２５４ｎｍ、
発光量８０ｍＷ／ｃｍ２（ランプ表面））、ランプ表面
と反応槽表面とがほぼ接する距離に配置した。 容器：石英ガラス製、外形１８ｍｍ、高さ２００ｍｍPhotocatalyst: SPARKT (manufactured by Kobe Steel Ltd.). Oxidizing the spherical Ti surface, immobilized photocatalyst surface portions was TiO 2 (diameter 2 mm). Light transmitting substance: glass beads (diameter 3 mm). Light source: ultraviolet lamp (diameter 18 mm, wavelength 254 nm,
The light emission amount was 80 mW / cm 2 (lamp surface)), and the lamp surface and the reaction tank surface were arranged at a distance almost in contact with each other. Container: quartz glass, outer shape 18 mm, height 200 mm
【００３４】（脱臭能力評価）処理前及び処理後の水に
おけるジオスミン（ＧＥＳ）、２−メチルイソボルネオ
ール（ＭＩＢ）及び２，４，６−トリクロロアニソール
（ＴＣＡ）の濃度を測定し、評価を行った。これらの物
質は水にかび臭を与える物質である。なお、評価は以下
のように行った。 方法：パージ＆トラップＧＣ−ＭＳ法（水道公定法に準拠） 装置：（１）質量分析器付きガスクロマトグラフ装置 （ヒューレット・パッカード社製 ＧＣ：ＨＰ６８９０、 ＭＳＤ：ＨＰ５９７３） （２）サーマルディソープションコールドトラップインジェクター （クロムパック社製 ＣＰ４０１０） （３）ＴＥＮＡＸ捕集セット（クロムパック社製） 未処理の被処理水の測定結果を含め、結果を表１に示
す。(Evaluation of Deodorizing Ability) The concentrations of diosmin (GES), 2-methylisoborneol (MIB) and 2,4,6-trichloroanisole (TCA) in water before and after the treatment were measured and evaluated. Was. These substances are substances that impart musty odor to water. In addition, evaluation was performed as follows. Method: Purge & trap GC-MS method (based on the official water supply method) Equipment: (1) Gas chromatograph with mass spectrometer (GC: HP6890, MSD: HP5973, manufactured by Hewlett-Packard) (2) Thermal desorption cold Trap injector (CP4010, manufactured by Chrome Pack) (3) TENAX collection set (manufactured by Chrome Pack) The results are shown in Table 1, including the results of measurement of untreated water to be treated.
【００３５】（透過光照度）中央に存在する光源の光
が、容器外部にどの程度伝達されるかを測定した。測定
は、反応槽（容器）壁面の外部（出光側。光源とほぼ対
向する位置で、光源から直接測定器に入射する光はな
い）で照度計（紫外線強度計 ＵＭ−１０（ミノルタ
（株）製））を用いて行った。結果を表１に示す。(Illuminance of transmitted light) It was measured how much light from a light source existing at the center was transmitted to the outside of the container. The measurement was carried out using an illuminometer (ultraviolet light intensity meter UM-10 (Minolta Co., Ltd.)) outside the reaction vessel (vessel) (outgoing light side; almost at the position facing the light source, no light directly entering the measuring instrument from the light source). Manufactured). Table 1 shows the results.
【００３６】[0036]
【表１】 [Table 1]
【００３７】表１から明らかなように、本発明の実施例
によれば、光透過物質を用いない場合に比べ、透過光照
度が大きく、中心部に配置された光源の光が容器外周部
の光触媒にまでよく伝達されていることがわかる。そし
て、少ない触媒量で従来と同様かそれ以上の脱臭効果が
得られることがわかる。As is clear from Table 1, according to the embodiment of the present invention, the illuminance of transmitted light is larger than that in the case where no light transmitting material is used, and the light of the light source arranged at the center is the photocatalyst at the outer periphery of the container. It can be seen that it is well transmitted to. And it turns out that the deodorizing effect similar to or more than the conventional one can be obtained with a small amount of the catalyst.
【００３８】（実施例４）図３に示した構成の反応槽を
用いた以外は実施例１〜３と同様に処理及び評価を行っ
た。すなわち、光触媒として、２ｍｍ×２ｍｍの網目状
のＴｉＯ２を５ｍｍ角に切断したもの（チタン板材の表
面を電気的に処理してＴｉＯ２皮膜を形成した後、網状
に加工したもの）を用い、光透過物質を用いなかった以
外は実施例１と同様にして処理及び評価を行った。未処
理の被処理水の測定結果を含め、結果を表２に示す。 （比較例３）比較例１と同様に処理及び評価を行った。
結果を表２に示す。Example 4 Processing and evaluation were carried out in the same manner as in Examples 1 to 3, except that the reaction tank having the structure shown in FIG. 3 was used. That is, as a photocatalyst, a 2 mm × 2 mm mesh-like TiO 2 cut into 5 mm squares (a titanium plate material is electrically treated to form a TiO 2 film and then processed into a mesh) is used, Processing and evaluation were performed in the same manner as in Example 1 except that no light transmitting material was used. Table 2 shows the results including the measurement results of the untreated water to be treated. (Comparative Example 3) Processing and evaluation were performed in the same manner as Comparative Example 1.
Table 2 shows the results.
【００３９】[0039]
【表２】 [Table 2]
【００４０】表２から明らかなように、触媒の形状を表
面積の大きな網目状にすることによって、粒状の触媒に
比べて非常に少ない触媒量で同等の脱臭能力が得られ、
触媒を効率的に使用できることが明らかである。As is clear from Table 2, by making the shape of the catalyst into a mesh having a large surface area, the same deodorizing ability can be obtained with a very small amount of catalyst as compared with the granular catalyst.
It is clear that the catalyst can be used efficiently.
【００４１】[0041]
【発明の効果】以上説明したように、本発明によれば、
光触媒を用いた水処理において、効率よく光触媒を用い
ることができるという効果を有する。特に、光透過性の
ない支持体に固定した光触媒を効率よく使用することが
できるため、剥離などの問題が少ない、安全な水処理を
安価で実現することが可能となる効果を有する。As described above, according to the present invention,
In the water treatment using a photocatalyst, there is an effect that the photocatalyst can be used efficiently. In particular, since a photocatalyst fixed to a support having no light transmission property can be used efficiently, there is an effect that safe water treatment can be realized at a low cost with less problems such as peeling.
【図１】本発明の一実施例における水処理装置の全体構
成を示す図。FIG. 1 is a diagram showing an overall configuration of a water treatment apparatus according to an embodiment of the present invention.
【図２】本発明による水処理装置の構成例を示す図。FIG. 2 is a diagram showing a configuration example of a water treatment apparatus according to the present invention.
【図３】本発明による水処理装置の別の構成例を示す
図。FIG. 3 is a diagram showing another configuration example of the water treatment apparatus according to the present invention.
【図４】本発明による水処理装置の別の構成例を示す
図。FIG. 4 is a diagram showing another configuration example of the water treatment apparatus according to the present invention.
【図５】本発明による水処理装置の別の構成例を示す
図。FIG. 5 is a diagram showing another configuration example of the water treatment apparatus according to the present invention.
１０ 本体部 １１ 入水口 １２ 吐水口 １３ 蓋 １５ 光透過物質 １６ 光触媒 ２０ 光源 DESCRIPTION OF SYMBOLS 10 Main body part 11 Water inlet 12 Water outlet 13 Lid 15 Light transmission material 16 Photocatalyst 20 Light source
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4D037 AA01 AA02 AA11 AB03 AB04 AB05 BA18 BB09 4D050 AA01 AA04 AA12 AB03 AB04 AB06 BC06 BC09 BD02 BD06 4G069 AA01 AA03 AA08 AA09 BA04A BA04B BA04C BA48A BA48C CA01 CA05 CA07 CA10 CA11 CA15 CA17 CA19 DA06 EA04X EA04Y EA18 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D037 AA01 AA02 AA11 AB03 AB04 AB05 BA18 BB09 4D050 AA01 AA04 AA12 AB03 AB04 AB06 BC06 BC09 BD02 BD06 4G069 AA01 AA03 AA08 AA09 BA04A BA04B BA04C BA48A BA07 CA10 CA11 CA10 DA06 EA04X EA04Y EA18
Claims (17)
ルゲート状を有することを特徴とする光触媒。1. A photocatalyst having a shape having a through hole, a coil shape, or a corrugated shape.
であることを特徴とする請求項１記載の光触媒。2. The photocatalyst according to claim 1, wherein said photocatalyst is obtained by oxidizing a titanium surface.
質と混合して用いることを特徴とする光触媒の使用方
法。3. A method for using a photocatalyst, wherein a photocatalyst activated by light is mixed with a light transmitting substance and used.
支持体の表面に設けられていることを特徴とする請求項
３記載の光触媒の使用方法。4. The method according to claim 3, wherein the photocatalyst is provided on a surface of a support that does not substantially transmit light.
対する前記光触媒の混合比が５０〜９８重量％であるこ
とを特徴とする請求項３記載の光触媒の使用方法。5. The method according to claim 3, wherein a mixing ratio of the photocatalyst to the total of the light transmitting material and the photocatalyst is 50 to 98% by weight.
であることを特徴とする請求項３記載の光触媒の使用方
法。6. The method according to claim 3, wherein the photocatalyst is obtained by oxidizing a titanium surface.
であることを特徴とする請求項３記載の光触媒の使用方
法。7. The method according to claim 3, wherein the photocatalyst and the light transmitting material are substantially spherical.
理する水処理装置であって、 前記被処理水を流入する入水口と、前記処理後の前記被
処理水を排出する吐水口とを有し、少なくとも前記光触
媒と光透過物質との混合物が充填された本体部と、 前記光触媒を所定の波長を有する光で照射する光源とを
有することを特徴とする水処理装置。8. A water treatment apparatus for treating treated water by bringing the treated water into contact with the surface of a photocatalyst, comprising: a water inlet for flowing the treated water; and a water outlet for discharging the treated water after the treatment. And a light source for irradiating the photocatalyst with light having a predetermined wavelength, the main body being filled with at least a mixture of the photocatalyst and the light transmitting substance.
支持体の表面に設けられていることを特徴とする請求項
８記載の水処理装置。9. The water treatment apparatus according to claim 8, wherein the photocatalyst is provided on a surface of a support that does not substantially transmit light.
に対する前記光触媒の混合比が５０〜９８重量％である
ことを特徴とする請求項８記載の水処理装置。10. The water treatment apparatus according to claim 8, wherein a mixing ratio of the photocatalyst to the total of the light transmitting substance and the photocatalyst is 50 to 98% by weight.
のであることを特徴とする請求項８記載の水処理装置。11. The water treatment apparatus according to claim 8, wherein the photocatalyst is obtained by oxidizing a titanium surface.
状であることを特徴とする請求項８記載の水処理装置。12. The water treatment apparatus according to claim 8, wherein the photocatalyst and the light transmitting substance are substantially spherical.
処理する水処理装置であって、 前記被処理水を流入する入水口と、前記処理後の前記被
処理水を排出する吐水口とを有し、少なくとも前記光触
媒が充填された本体部と、 前記光触媒を所定の波長を有する光で照射する光源とを
有し、前記光触媒が、貫通孔を有する形状或いはコイル
状或いはコルゲート状のいずれかの形状を有することを
特徴とする水処理装置。13. A water treatment apparatus for treating treated water by bringing the treated water into contact with the surface of a photocatalyst, comprising: a water inlet through which the treated water flows in; a water outlet through which the treated water is discharged after the treatment. Having at least the main body portion filled with the photocatalyst, and a light source for irradiating the photocatalyst with light having a predetermined wavelength, wherein the photocatalyst has a through hole, a coil shape, or a corrugated shape. A water treatment device having the shape of
はハニカム状であることを特徴とする請求項１３記載の
水処理装置14. The water treatment apparatus according to claim 13, wherein the shape having the through holes is a mesh shape or a honeycomb shape.
い支持体の表面に設けられていることを特徴とする請求
項１３記載の水処理装置。15. The water treatment apparatus according to claim 13, wherein the photocatalyst is provided on a surface of a support that does not substantially transmit light.
のであることを特徴とする請求項１３記載の水処理装
置。16. The water treatment apparatus according to claim 13, wherein the photocatalyst is obtained by oxidizing a titanium surface.
と直交する断面積が最小とならない方向で前記本体部に
充填されていることを特徴とする請求項１３記載の水処
理装置。17. The water treatment apparatus according to claim 13, wherein the photocatalyst is filled in the main body in a direction in which a cross-sectional area orthogonal to a direction in which the treated water passes is not minimized.
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|---|---|---|---|
| JP00466299A JP4249308B2 (en) | 1999-01-11 | 1999-01-11 | Water treatment equipment using photocatalyst |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00466299A JP4249308B2 (en) | 1999-01-11 | 1999-01-11 | Water treatment equipment using photocatalyst |
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|---|---|
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| JP4249308B2 JP4249308B2 (en) | 2009-04-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015016466A (en) * | 2013-06-21 | 2015-01-29 | 台北医学大学 | Water treating apparatus and process for preparation of fine water cluster and fine water cluster prepared with the apparatus or process |
| JP2015047560A (en) * | 2013-09-02 | 2015-03-16 | ユーヴィックス株式会社 | Photocatalyst sheet |
| CN113526753A (en) * | 2021-07-30 | 2021-10-22 | 南京工业大学 | Method for treating phenolic wastewater by coupling high-voltage pulse discharge with molybdenum disulfide |
| CN116854184A (en) * | 2023-09-04 | 2023-10-10 | 河南蓝天环境工程有限公司 | Waste water treatment device for photocatalytic degradation |
-
1999
- 1999-01-11 JP JP00466299A patent/JP4249308B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015016466A (en) * | 2013-06-21 | 2015-01-29 | 台北医学大学 | Water treating apparatus and process for preparation of fine water cluster and fine water cluster prepared with the apparatus or process |
| US10661003B2 (en) | 2013-06-21 | 2020-05-26 | Taipei Medical University | Apparatus and process for preparation of small water cluster and small molecular cluster water prepared therefrom |
| JP2015047560A (en) * | 2013-09-02 | 2015-03-16 | ユーヴィックス株式会社 | Photocatalyst sheet |
| CN113526753A (en) * | 2021-07-30 | 2021-10-22 | 南京工业大学 | Method for treating phenolic wastewater by coupling high-voltage pulse discharge with molybdenum disulfide |
| CN116854184A (en) * | 2023-09-04 | 2023-10-10 | 河南蓝天环境工程有限公司 | Waste water treatment device for photocatalytic degradation |
| CN116854184B (en) * | 2023-09-04 | 2024-02-02 | 河南蓝天环境工程有限公司 | Waste water treatment device for photocatalytic degradation |
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