JP2009208076A - Adsorbent, and water purifier using the same - Google Patents
Adsorbent, and water purifier using the same Download PDFInfo
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- JP2009208076A JP2009208076A JP2009119763A JP2009119763A JP2009208076A JP 2009208076 A JP2009208076 A JP 2009208076A JP 2009119763 A JP2009119763 A JP 2009119763A JP 2009119763 A JP2009119763 A JP 2009119763A JP 2009208076 A JP2009208076 A JP 2009208076A
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- 239000003463 adsorbent Substances 0.000 title claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 239000002245 particle Substances 0.000 claims abstract description 102
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 10
- 229910000323 aluminium silicate Inorganic materials 0.000 claims abstract description 5
- 239000001506 calcium phosphate Substances 0.000 claims abstract description 5
- 229910001410 inorganic ion Inorganic materials 0.000 claims abstract description 5
- 229910000389 calcium phosphate Inorganic materials 0.000 claims abstract description 4
- 235000011010 calcium phosphates Nutrition 0.000 claims abstract description 4
- -1 titanium silicate compound Chemical class 0.000 claims description 16
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- GNKTZDSRQHMHLZ-UHFFFAOYSA-N [Si].[Si].[Si].[Ti].[Ti].[Ti].[Ti].[Ti] Chemical compound [Si].[Si].[Si].[Ti].[Ti].[Ti].[Ti].[Ti] GNKTZDSRQHMHLZ-UHFFFAOYSA-N 0.000 abstract description 5
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 25
- 238000001179 sorption measurement Methods 0.000 description 25
- 239000011133 lead Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 16
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- 238000010438 heat treatment Methods 0.000 description 8
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- 239000004698 Polyethylene Substances 0.000 description 6
- 239000010419 fine particle Substances 0.000 description 6
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- 238000000746 purification Methods 0.000 description 6
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- 239000002808 molecular sieve Substances 0.000 description 5
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
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- 239000004743 Polypropylene Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000440 bentonite Substances 0.000 description 3
- 229910000278 bentonite Inorganic materials 0.000 description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 description 3
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- 239000002734 clay mineral Substances 0.000 description 3
- RLJMLMKIBZAXJO-UHFFFAOYSA-N lead nitrate Chemical compound [O-][N+](=O)O[Pb]O[N+]([O-])=O RLJMLMKIBZAXJO-UHFFFAOYSA-N 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
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- 241000894006 Bacteria Species 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
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- 238000005469 granulation Methods 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
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- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
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- 239000011148 porous material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 244000132059 Carica parviflora Species 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 240000005979 Hordeum vulgare Species 0.000 description 1
- 235000007340 Hordeum vulgare Nutrition 0.000 description 1
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
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- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
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- 229910052802 copper Inorganic materials 0.000 description 1
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- 229920001971 elastomer Polymers 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000012013 faujasite Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052680 mordenite Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920006350 polyacrylonitrile resin Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- GBNXLQPMFAUCOI-UHFFFAOYSA-H tetracalcium;oxygen(2-);diphosphate Chemical compound [O-2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GBNXLQPMFAUCOI-UHFFFAOYSA-H 0.000 description 1
- 229910052613 tourmaline Inorganic materials 0.000 description 1
- 229940070527 tourmaline Drugs 0.000 description 1
- 239000011032 tourmaline Substances 0.000 description 1
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 1
- 235000019731 tricalcium phosphate Nutrition 0.000 description 1
- 229940078499 tricalcium phosphate Drugs 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
Description
本発明は、強度及び吸着性能に優れ、特に浄水器用途に適した吸着剤と、これを用いた浄水器に関する。 The present invention relates to an adsorbent that is excellent in strength and adsorption performance, particularly suitable for water purifier applications, and a water purifier using the adsorbent.
鉛、鉄、銅、ニッケル、亜鉛、クロム、カドミウムなどの重金属類は、地中、配水管などから溶出し、井戸水、水道水中にイオンの形態として含まれている可能性がある。これらを除去する方法については様々な検討がなされている。 Heavy metals such as lead, iron, copper, nickel, zinc, chromium, and cadmium are eluted from the ground and distribution pipes and may be contained in the form of ions in well water and tap water. Various studies have been made on methods for removing these.
これら重金属類の吸着剤としては、例えば合成ゼオライト、非晶質のチタンケイ酸塩等が知られている（例えば特許文献１、特許文献２）。 As these heavy metal adsorbents, for example, synthetic zeolite, amorphous titanium silicate and the like are known (for example, Patent Document 1 and Patent Document 2).
一般に合成ゼオライト等の吸着剤は数十μｍ以下の微小結晶で合成されており、そのままの状態では通水時に圧力損失の増大を招くので、浄水器の吸着剤としての使用は難しい。従って、適度な粒径範囲に吸着剤を造粒することが行われている。 In general, adsorbents such as synthetic zeolite are synthesized with microcrystals of several tens of μm or less, and in that state, the pressure loss increases when water is passed through, so that it is difficult to use as an adsorbent for water purifiers. Therefore, the adsorbent is granulated in an appropriate particle size range.
造粒方法としては、バインダー、結合剤を用いて微粒子同士を結合し、粒径を増大させる方法が知られており、バインダーの例としてはベントナイト、ケイソウ土、コロイダルシリカ、セルロース類、アルギン酸塩等が用いられている（例えば特許文献３）。 As a granulation method, a method of binding fine particles with a binder and a binder to increase the particle size is known. Examples of the binder include bentonite, diatomaceous earth, colloidal silica, celluloses, alginates, and the like. Is used (for example, Patent Document 3).
ベントナイトやカオリン等の粘土鉱物と、合成ゼオライト微粒子と水を適当な配合割合で混合し、６００〜８００℃の高温で焼成すると、ベントナイトなどの粘土鉱物は７００℃付近で焼結するので、合成ゼオライト微粒子の結合剤の役割を果たす。 When clay minerals such as bentonite and kaolin, synthetic zeolite fine particles and water are mixed at an appropriate blending ratio and calcined at a high temperature of 600 to 800 ° C., clay minerals such as bentonite sinter at around 700 ° C., so synthetic zeolite Acts as a binder for fine particles.
しかしながら、吸着剤を粘土鉱物と共に高い温度で加熱する方法は、吸着剤の構造の崩壊等により、吸着性能の低下が生じる可能性があった。 However, the method of heating the adsorbent together with the clay mineral at a high temperature may cause a decrease in the adsorption performance due to the collapse of the adsorbent structure.
また、Ｃａ型及び／またはＮａ型のＣＭＣ（カルボキシメチルセルロース）を使用する
方法や、有機系重合体エマルジョンまたはラテックスを使用して造粒する方法も知られて
いる（例えば特許文献４、特許文献５）。
In addition, a method using Ca type and / or Na type CMC (carboxymethylcellulose) and a method of granulating using an organic polymer emulsion or latex are also known (for example, Patent Document 4 and Patent Document 5). ).
しかしながら、ＣＭＣ等の有機物を用いた場合、高温での熱処理が要らない反面、有機化合物やその添加剤の溶出の可能性があり、浄水器用充填材としては適当でない場合がある。また、少量の有機系バインダーにより造粒した粉末ゼオライトは、浄水器に使用した場合、十分な強度が得られず微粒子に崩壊する場合もある。 However, when an organic substance such as CMC is used, heat treatment at a high temperature is not required, but there is a possibility that an organic compound or its additive may be eluted, and it may not be suitable as a filler for a water purifier. In addition, powdered zeolite granulated with a small amount of an organic binder, when used in a water purifier, may not have sufficient strength and may collapse into fine particles.
本発明は、強度及び吸着性能に優れ、特に浄水器用途に適した吸着剤と、これを用いた浄水器を提供することを目的とする。 An object of the present invention is to provide an adsorbent which is excellent in strength and adsorption performance and is particularly suitable for water purifier applications, and a water purifier using the adsorbent.
即ち本発明の第一の要旨は、熱可塑性樹脂からなる母粒子の表面に、アルミノケイ酸塩系無機イオン交換体、ケイ酸チタニウム系化合物又はリン酸カルシウム系化合物のいずれかを含む子粒子が、母粒子の表面の溶融により接着又は圧着されてなる吸着剤である。 That is, the first gist of the present invention is that a child particle containing any one of an aluminosilicate inorganic ion exchanger, a titanium silicate compound, or a calcium phosphate compound on the surface of a mother particle made of a thermoplastic resin is a mother particle. The adsorbent is bonded or pressure-bonded by melting the surface of the adsorbent.
また、本発明の第二要旨は、上記吸着剤を濾材に用いた浄水器である。 The second gist of the present invention is a water purifier using the adsorbent as a filter medium.
本発明の吸着剤は、熱可塑性樹脂からなる母粒子の表面に、吸着性能を有する子粒子が固定化されていることから、高い吸着性能を維持しつつ、強度にも優れている。
また、本発明の吸着剤の製造方法は、極度に高い温度で造粒する必要が無いため、より簡便な設備で効率よく吸着剤を製造することができる。
また、本発明の吸着剤を濾材として用いた浄水器は、重金属等の有害物が除去された安全な水を長期に亘って得ることができる。
The adsorbent of the present invention is excellent in strength while maintaining high adsorption performance because child particles having adsorption performance are immobilized on the surface of mother particles made of a thermoplastic resin.
Moreover, since the manufacturing method of the adsorbent of this invention does not need to granulate at extremely high temperature, it can manufacture adsorbent efficiently with simpler equipment.
Moreover, the water purifier using the adsorbent of the present invention as a filter medium can obtain safe water from which harmful substances such as heavy metals have been removed over a long period of time.
以下、本発明を詳しく説明する。
本発明の吸着剤は、熱可塑性樹脂であるポリオレフィン樹脂からなる母粒子の表面に、吸着性能を有する子粒子が固定化されてなる。ここで、ポリオレフィン樹脂の種類は特に限定はされず、ポリエチレン樹脂、ポリプロピレン樹脂、ポリスチレン樹脂、ポリアクリロニトリル樹脂、スチレン−アクリロニトリル共重合体、アクリロニトリル−ブタジエン−スチレン共重合体等が例として挙げられる。
中でも、ポリエチレン樹脂は融点が低く、従って低い加熱温度で造粒できるため好ましい。
The present invention will be described in detail below.
The adsorbent of the present invention is formed by immobilizing child particles having adsorption performance on the surface of mother particles made of a polyolefin resin, which is a thermoplastic resin. Here, the kind of polyolefin resin is not particularly limited, and examples thereof include polyethylene resin, polypropylene resin, polystyrene resin, polyacrylonitrile resin, styrene-acrylonitrile copolymer, acrylonitrile-butadiene-styrene copolymer, and the like.
Among them, polyethylene resin is preferable because it has a low melting point and can be granulated at a low heating temperature.
本発明に使用する吸着性能を有する子粒子としては、重金属、中でも鉛の吸着性能が優れているアルミノケイ酸塩系無機イオン交換体、ケイ酸チタニウム系化合物、リン酸カルシウム系化合物の少なくとも１種類を含む。
本発明の吸着剤は、一つの母粒子に１種類の子粒子を固定化しても、複数種類の子粒子を固定化しても構わない。
The child particles having the adsorption performance used in the present invention include at least one of an aluminosilicate inorganic ion exchanger, a titanium silicate compound, and a calcium phosphate compound that are excellent in adsorption performance of heavy metals, especially lead.
In the adsorbent of the present invention, one kind of child particle may be fixed to one mother particle, or a plurality of kinds of child particles may be fixed.
アルミノケイ酸塩系無機イオン交換体としては、合成ゼオライトであるモレキュラーシーブ３Ａ、モレキュラーシーブ４Ａ、モレキュラーシーブ５Ａ、モレキュラーシーブ１３Ｘ、フォージャサイト型ゼオライト、モルデナイト型ゼオライトが挙げられる。これら合成ゼオライトは重金属イオンの吸着能力が高く、特にモレキュラーシーブ５Ａは、溶解性鉛イオンの吸着性に優れている。 Examples of the aluminosilicate inorganic ion exchanger include molecular sieve 3A, molecular sieve 4A, molecular sieve 5A, molecular sieve 13X, faujasite type zeolite, and mordenite type zeolite, which are synthetic zeolites. These synthetic zeolites have a high adsorption capacity for heavy metal ions. In particular, the molecular sieve 5A is excellent in the adsorption of soluble lead ions.
吸着性能を有する子粒子は、比表面積が１００ｍ２／ｇ以上であることが好ましい。特に比表面積が３００ｍ２／ｇ以上のものは、カルシウム、マグネシウム等の競合イオンの存在下においても、重金属の選択的吸着性能に優れているためより好ましい。 The child particles having adsorption performance preferably have a specific surface area of 100 m 2 / g or more. In particular, those having a specific surface area of 300 m 2 / g or more are more preferable because they have excellent heavy metal selective adsorption performance even in the presence of competing ions such as calcium and magnesium.
リン酸カルシウム系化合物としては、ヒドロキシアパタイト、リン酸三カルシウム、リン酸四カルシウム等が挙げられる。これらリン酸カルシウム系化合物は、リン酸塩水溶液とカルシウム塩水溶液を反応させることにより合成することができる。 Examples of calcium phosphate compounds include hydroxyapatite, tricalcium phosphate, and tetracalcium phosphate. These calcium phosphate compounds can be synthesized by reacting an aqueous phosphate solution and an aqueous calcium salt solution.
浄水器は通常、１〜５Ｌ／分程度の流量が要求される。このため、吸着剤を浄水器に使用する場合、この流量を配慮した大きさが必要であり、平均粒径３０〜１５００μｍの顆粒状のものが好ましく用いられる。平均粒径が３０μｍより小さいと、濾過抵抗が上昇し通水性が低下する傾向にある。一方、平均粒径が１５００μｍより大きいと、粒子間の空隙が大きくなり、除去性能が低くなる傾向が見られる。吸着剤の平均粒径は５０〜７５０μｍの範囲がより好ましい。
なお、ここでいう吸着剤の平均粒径とは、母粒子に子粒子が固定化された状態での吸着剤全体の粒径をいうものであり、標準ふるいを用いて篩い分けを行うことによって求めることができる。
The water purifier usually requires a flow rate of about 1 to 5 L / min. For this reason, when using an adsorption agent for a water purifier, the magnitude | size which considered this flow volume is required, and the granular thing with an average particle diameter of 30-1500 micrometers is used preferably. When the average particle size is smaller than 30 μm, the filtration resistance increases and the water permeability tends to decrease. On the other hand, when the average particle size is larger than 1500 μm, the voids between the particles become large and the removal performance tends to be lowered. The average particle diameter of the adsorbent is more preferably in the range of 50 to 750 μm.
The average particle size of the adsorbent here refers to the particle size of the entire adsorbent in a state in which the child particles are immobilized on the mother particles, and by sieving using a standard sieve Can be sought.
母粒子の平均粒径は、大きすぎると吸着剤の粒径が大きくなりすぎるため、１３００μｍ以下が好ましく、７５０μm以下がより好ましい。一方、小さすぎると表面に子粒子を固定化し難くなるため、２０μm以上が好ましく、５０μm以上がより好ましい。 If the average particle size of the mother particles is too large, the particle size of the adsorbent becomes too large, preferably 1300 μm or less, and more preferably 750 μm or less. On the other hand, if the particle size is too small, it becomes difficult to immobilize the child particles on the surface.
子粒子の平均粒径が大きすぎると、母粒子表面への固定化し難くなり、かつ吸着性能が低下する傾向にある。従って、子粒子の平均粒径は１００μm以下が好ましく、５０μm以下がより好ましい。一方、子粒子の平均粒径が小さすぎると、母粒子に対して固定化できる子粒子の量が減り、吸着剤の体積あたりの性能が低下する傾向にある。従って子粒子の平均粒径は５μm以上が好ましく、２０μm以上がより好ましい。 If the average particle size of the child particles is too large, it will be difficult to fix to the surface of the mother particles, and the adsorption performance tends to be lowered. Therefore, the average particle size of the child particles is preferably 100 μm or less, and more preferably 50 μm or less. On the other hand, if the average particle size of the child particles is too small, the amount of child particles that can be immobilized with respect to the mother particles is reduced, and the performance per volume of the adsorbent tends to be reduced. Therefore, the average particle size of the child particles is preferably 5 μm or more, and more preferably 20 μm or more.
吸着剤全体の体積に対する母粒子の体積の割合は、少なすぎると子粒子を表面に固定化する結合力が弱くなる傾向にある。従って、母粒子の体積をＡ、子粒子の体積をＢとしたとき、Ａ／（Ａ＋Ｂ）が０．２５以上であることが好ましく、０．４０以上であることがより好ましい。 If the ratio of the volume of the mother particles to the total volume of the adsorbent is too small, the binding force for immobilizing the child particles on the surface tends to be weak. Therefore, when the volume of the mother particle is A and the volume of the child particle is B, A / (A + B) is preferably 0.25 or more, and more preferably 0.40 or more.
一方母粒子の体積の割合が多すぎると、母粒子に対して固定化できる子粒子の量が減り、吸着剤の体積あたりの性能が低下する傾向にある。従って、Ａ／（Ａ＋Ｂ）が０．９５以下であることが好ましく、０．９０以下であることがより好ましい。 On the other hand, when the volume ratio of the mother particles is too large, the amount of child particles that can be immobilized on the mother particles decreases, and the performance per volume of the adsorbent tends to decrease. Therefore, A / (A + B) is preferably 0.95 or less, and more preferably 0.90 or less.
なお、母粒子及び子粒子の体積は、例えば以下の手順により求めることができる。
１．乾燥させた吸着剤の質量を測定する。
２．母粒子が燃焼し揮発する温度以上の強熱により吸着剤を加熱し、残った質量を測定して子粒子の質量とする。
３．加熱前の吸着剤の質量から子粒子の質量を差し引いて母粒子の質量とする。
４．母粒子及び子粒子それぞれについて、密度と質量から体積を算出する。
In addition, the volume of a mother particle and a child particle can be calculated | required with the following procedures, for example.
1. The mass of the dried adsorbent is measured.
2. The adsorbent is heated by high heat above the temperature at which the mother particles burn and volatilize, and the remaining mass is measured to obtain the mass of the child particles.
3. The mass of the child particles is subtracted from the mass of the adsorbent before heating to obtain the mass of the mother particles.
4). For each of the mother particles and the child particles, the volume is calculated from the density and mass.
吸着剤の微粒子同士を結合させる接着剤としてバインダーを使用していた従来技術では、吸着性能を有さないバインダーの配合割合をできるだけ少なくしていたため、造粒後の強度が不十分となりがちであった。これに対し本発明では、熱可塑性樹脂を母粒子として使用し、母粒子表面に、強度の低下を招くことなく吸着剤の子粒子を緻密に固定化させることが可能になる。従って、本発明の吸着剤は、十分な吸着性能を保ちつつ、十分な強度をも有している。 In the conventional technology that uses a binder as an adhesive for bonding adsorbent fine particles to each other, the blending ratio of the binder that does not have adsorption performance is reduced as much as possible, so the strength after granulation tends to be insufficient. It was. On the other hand, in this invention, it becomes possible to fix | immobilize the child particle | grains of an adsorbent precisely on the surface of a mother particle, without causing a fall of intensity | strength, using a thermoplastic resin as a mother particle. Therefore, the adsorbent of the present invention has sufficient strength while maintaining sufficient adsorption performance.
本発明の吸着剤の製造方法は、熱可塑性樹脂からなる母粒子の表面に吸着性能を有する子粒子を固定化するにあたって、溶融接着又は圧着により子粒子を固定化させるものである。
溶融接着を行う場合の方法としては、例えば熱風気流中に、母粒子と子粒子とを分散させながら加熱する方法が挙げられる。この方法は、母粒子表面に均一に子粒子を固定化できるため好ましい。この方法の製造装置としては、日本ニューマチック工業株式会社の型式ＳＦＳ−３を例として挙げることができる。
The method for producing an adsorbent of the present invention is to immobilize child particles by fusion bonding or pressure bonding when immobilizing child particles having adsorption performance on the surface of mother particles made of a thermoplastic resin.
As a method for performing melt bonding, for example, a method of heating while dispersing the mother particles and the child particles in a hot air stream can be mentioned. This method is preferable because the child particles can be uniformly fixed on the surface of the mother particles. As a manufacturing apparatus of this method, model SFS-3 of Nippon Pneumatic Industry Co., Ltd. can be mentioned as an example.
加熱温度は、母粒子として使用する熱可塑性樹脂が結晶性の場合、その融点よりも１０〜５０℃高い温度で加熱すると、接着性が向上するため好ましい。一方、熱可塑性樹脂が非晶性の場合、Ｔｇよりも１０〜５０℃高い温度で加熱するのが好ましい。 When the thermoplastic resin used as the mother particles is crystalline, heating is preferably performed at a temperature 10 to 50 ° C. higher than the melting point because the adhesiveness is improved. On the other hand, when the thermoplastic resin is amorphous, it is preferably heated at a temperature 10 to 50 ° C. higher than Tg.
圧着により子粒子を固定化させる場合の方法としては、例えば容器内に母粒子と子粒子を入れて、容器を回転させることによって遠心力を発生させる方法が挙げられる。具体的には、容器の内部にロータを配し、容器とロータの間に母粒子と子粒子とを分散させて、容器とロータとをそれぞれ反対方向に回転させる。このとき、容器及びロータの断面形状は共に楕円形が好ましい。 As a method for immobilizing the child particles by pressure bonding, for example, a method of generating centrifugal force by putting the mother particles and child particles in a container and rotating the container is mentioned. Specifically, a rotor is arranged inside the container, mother particles and child particles are dispersed between the container and the rotor, and the container and the rotor are rotated in opposite directions. At this time, the cross-sectional shapes of the container and the rotor are preferably elliptical.
この際の回転速度は、容器よりも楕円ロータを高速で回転させることが好ましい。容器の回転は、母粒子と子粒子を適度に分散させるために行うものであり、その回転速度は２０〜２５０回転／分程度が好ましい。楕円ロータの回転は、容器と楕円ロータとの間に存在するそれぞれの粒子に圧縮力を加えるために行うものであり、その回転速度は１０００〜５０００回転／分程度が好ましい。
この方法は圧縮力を繰り返し加えることができるため、母粒子表面に均一に子粒子を固定化できる。この方法の製造装置としては、例えば株式会社徳寿工作所のシータ・コンポーザを挙げることができる。
In this case, the rotational speed of the elliptical rotor is preferably higher than that of the container. The container is rotated to disperse the mother particles and the child particles appropriately, and the rotation speed is preferably about 20 to 250 rotations / minute. The rotation of the elliptical rotor is performed to apply a compressive force to each particle existing between the container and the elliptical rotor, and the rotation speed is preferably about 1000 to 5000 rotations / minute.
Since this method can repeatedly apply a compressive force, the child particles can be uniformly immobilized on the surface of the mother particles. As a manufacturing apparatus of this method, for example, theta composer of Tokuju Corporation can be cited.
この他に、例えば母粒子と子粒子とを容器に入れ、撹拌しながら加熱する方法、容器を振盪させながら加熱する方法等によって製造することもできる。 In addition to this, for example, the mother particles and the child particles can be produced by putting them in a container and heating them with stirring, or heating them while shaking the containers.
本発明の吸着剤は、鉛吸着量が１５０ｍｇ／ｇ以上とすること、圧縮強度が１．０Ｎ／ｍｍ２以上とすることによって、浄水器に用いた際に十分な強度を備え、従って通水により破壊されたりすることなく、かつ良好な鉛吸着性能を付与できるため好ましい。なお、鉛の吸着量（ｍｇ／ｇ）とは、鉛を含む水溶液に、吸着剤を２４時間浸漬させた際に、吸着剤が１ｇ当たり吸着する鉛の量をいう。
具体的には、例えば硝酸鉛水溶液を鉛濃度２００ｍｇ／Ｌとなるように調製して三角フラスコに２００ｍｌ分取し、吸着剤１００ｍｇを添加し、振とうさせた後、２４時間後にフィルターで濾過し、濾液水中の残留鉛濃度を測定することによって鉛吸着量を求めることが出来る。
The adsorbent of the present invention has sufficient strength when used in a water purifier by having a lead adsorption amount of 150 mg / g or more and a compressive strength of 1.0 N / mm 2 or more. It is preferable because it can be imparted with good lead adsorption performance without being broken by. The lead adsorption amount (mg / g) refers to the amount of lead adsorbed per gram when the adsorbent is immersed in an aqueous solution containing lead for 24 hours.
Specifically, for example, an aqueous lead nitrate solution is prepared so as to have a lead concentration of 200 mg / L, and 200 ml is taken into an Erlenmeyer flask, 100 mg of adsorbent is added, shaken, and then filtered with a filter after 24 hours. The amount of lead adsorption can be determined by measuring the residual lead concentration in the filtrate water.
また、圧縮強度（Ｎ／ｍｍ２）とは、平松、岡、木山：日本鉱業会誌，１１，１０２４（１９６５）の方法を参考に、吸着剤を平板で圧縮する際に、吸着剤にかかる荷重から求めるものであり、圧縮強度；Ｓｔ（Ｎ／ｍｍ２）、Ｐ；荷重（Ｎ）、ｄ；粒子径（ｍｍ）としたとき、Ｓｔ＝２．８Ｐ／πｄ２の式から算出する。
吸着剤の圧縮強度は、１．３Ｎ／ｍｍ２以上がより好ましく、１．５Ｎ／ｍｍ２以上が
更に好ましい。
The compressive strength (N / mm 2 ) is the load applied to the adsorbent when the adsorbent is compressed with a flat plate with reference to the method of Hiramatsu, Oka, Kiyama: Journal of the Japan Mining Association, 11, 1024 (1965). The compression strength; St (N / mm 2 ), P; load (N), d; particle diameter (mm) is calculated from the formula of St = 2.8 P / πd 2 .
Compressive strength of the adsorbent is more preferably 1.3 N / mm 2 or more, 1.5 N / mm 2 or more is more preferable.
本発明の吸着剤を濾材として用いた浄水器は、重金属類を効率的に除去することが出来る。図１は、本発明の浄水器の一例を示す断面図である。図１の浄水器は、吸着剤を配した第一の浄化槽２と、多孔質中空糸膜を配した第二の浄化槽７を有する。また、第一の浄化槽２と第二の浄化槽７との間には、流量センサー９が配されている。水道水等の原水は、入口６から入って吸着剤や多孔質中空糸膜によって浄化された後、吐水口１１から浄水として取り出される。
本発明の吸着剤を濾材として用いた浄水器は、併せて残留塩素、トリハロメタン、一般有機化学物質、消毒副生成物、農薬などを効率よく除去するためには、本発明の吸着剤に加えて、活性炭を用いるのが好ましい。活性炭は、除去能力は低いものの、重金属類も吸着し、吸着剤の吸着性能の長寿命化に寄与するため、活性炭と本発明の吸着剤を併用することがより好ましい。
The water purifier using the adsorbent of the present invention as a filter medium can efficiently remove heavy metals. Drawing 1 is a sectional view showing an example of the water purifier of the present invention. The water purifier of FIG. 1 has a first septic tank 2 in which an adsorbent is disposed and a second septic tank 7 in which a porous hollow fiber membrane is disposed. A flow rate sensor 9 is disposed between the first septic tank 2 and the second septic tank 7. Raw water such as tap water enters from the inlet 6 and is purified by an adsorbent or a porous hollow fiber membrane, and then is taken out from the water outlet 11 as purified water.
In addition to the adsorbent of the present invention, the water purifier using the adsorbent of the present invention as a filter medium can be used to efficiently remove residual chlorine, trihalomethane, general organic chemicals, disinfection by-products, agricultural chemicals and the like. It is preferable to use activated carbon. Although activated carbon has a low removal capability, it also adsorbs heavy metals and contributes to a longer life of the adsorption performance of the adsorbent. Therefore, it is more preferable to use activated carbon in combination with the adsorbent of the present invention.
活性炭としては、残留塩素、トリハロメタン、一般有機化学物質、消毒副生成物、農薬などの除去する目的に合致する性能を有しているものであれば特に限定されず、その形状は、粉末状、繊維状、或いは粒状のものなどを用いることができる。 The activated carbon is not particularly limited as long as it has performance that meets the purpose of removing residual chlorine, trihalomethane, general organic chemicals, disinfection by-products, agricultural chemicals, etc. A fibrous or granular material can be used.
また、活性炭の種類は必ずしも限定されず、ヤシ殻活性炭、骨炭、木炭等天然系活性炭、ピッチ系、石油コークス系、樹脂やゴム等の焼成賦活物或いは化学的賦活物等を用いることが出来るが、除去すべき物質はトリハロメタンなど比較的分子量の小さなものが多いため、経済性をも含めて考慮すると、水蒸気賦活ヤシ殻活性炭が実用的に最も好ましい。さらに、抗菌性を付与するために、銀等を添着しても構わない。 The type of activated carbon is not necessarily limited, and natural activated carbon such as coconut shell activated carbon, bone charcoal, charcoal, pitch-based, petroleum coke-based, fired activated material such as resin or rubber, or chemically activated material can be used. Since many substances having a relatively low molecular weight, such as trihalomethane, are to be removed, water vapor activated coconut shell activated carbon is most practically preferable in consideration of economy. Furthermore, silver or the like may be added to impart antibacterial properties.
本発明の浄水器としては、吸着剤と共に、多孔質膜を用いると鉄錆や、病原生物（一般細菌、大腸菌、大腸菌群）等の固形物を除去出来るためより好ましい。多孔質膜としては、平膜、中空糸膜、チューブラー膜等を用いることができるが、容積効率が高い中空糸膜を用いることがより好ましい。 As a water purifier of the present invention, it is more preferable to use a porous membrane together with an adsorbent because solid matter such as iron rust and pathogenic organisms (general bacteria, Escherichia coli, coliforms) can be removed. As the porous membrane, a flat membrane, a hollow fiber membrane, a tubular membrane or the like can be used, but it is more preferable to use a hollow fiber membrane having a high volumetric efficiency.
中空糸膜としては、例えば、セルロース系、ポリオレフィン系（ポリエチレン、ポリプロピレン）、ポリビニルアルコール系、エチレン・ビニルアルコール共重合体、ポリエーテル系、ポリメタクリル酸メチル（ＰＭＭＡ）系、ポリスルフォン系、ポリアクリロニトリル系、ポリ弗化エチレン（テフロン（登録商標））系、ポリカーボネート系、ポリエステル系、ポリアミド系、芳香族ポリアミド系等の各種材料からなるものを好適に使用できる。中でも、膜の強伸度や耐屈曲性、洗浄性、取扱性や耐薬品性の高さ等を考慮すると、ポリエチレンやポリプロピレン等のポリオレフィン系中空糸膜が好ましい。 Examples of the hollow fiber membrane include cellulose, polyolefin (polyethylene, polypropylene), polyvinyl alcohol, ethylene / vinyl alcohol copolymer, polyether, polymethyl methacrylate (PMMA), polysulfone, and polyacrylonitrile. A material made of various materials such as polyethylene, polyfluorinated ethylene (Teflon (registered trademark)), polycarbonate, polyester, polyamide, and aromatic polyamide can be suitably used. Of these, polyolefin hollow fiber membranes such as polyethylene and polypropylene are preferred in view of the high elongation, flexibility, detergency, handleability, and high chemical resistance of the membrane.
また、特に限定されるものではないが、中空糸の外径は２０〜２０００μｍ、孔径は０．０１〜２μｍ、空孔率は２０〜９０％、膜厚は５〜３００μｍのものが好ましい。 Although not particularly limited, the hollow fiber preferably has an outer diameter of 20 to 2000 μm, a pore diameter of 0.01 to 2 μm, a porosity of 20 to 90%, and a film thickness of 5 to 300 μm.
浄水器に多孔質膜を使用する際には、他の濾材を水が通過した後の最終段に設けると、浄水出口からの菌逆汚染の懸念を最小限と出来るため好ましい。 When using a porous membrane for the water purifier, it is preferable to provide another filter medium in the final stage after the water has passed, since the concern about back-fouling of bacteria from the water purification outlet can be minimized.
吸着剤、活性炭については、どのような順序で配置してもよい。また、二者を混合して用いても差し支えない。また、活性炭に加えて、例えばイオン交換樹脂、亜硫酸カルシウム、コーラルサンド、麦飯石、医王石、トルマリン等他の成分を併用させても構わない。 The adsorbent and activated carbon may be arranged in any order. Also, a mixture of the two may be used. Further, in addition to activated carbon, other components such as ion exchange resin, calcium sulfite, coral sand, barley stone, Ioishi, tourmaline may be used in combination.
吸着剤、活性炭、並びに多孔質膜は、一つの容器内に収められていても、複数個の容器に収められこれらを組み合わせた形のものでも構わない。また、上記の組み合わせに更に一次フィルターを用いて粗ゴミを予め除去出来るようにすると好ましい。 The adsorbent, the activated carbon, and the porous membrane may be contained in a single container or may be a combination of these contained in a plurality of containers. Further, it is preferable to further remove coarse dust in advance by using a primary filter in the above combination.
以下、実施例を挙げて本発明を更に詳しく説明する。 Hereinafter, the present invention will be described in more detail with reference to examples.
子粒子として粒径１０〜３０μｍ、平均粒径２０μｍのケイ酸チタニウム（エンゲルハード社製、ＡＴＳ powder standard）の微粒子を、母粒子として粒径１００〜７５０μｍ、平均粒径４２０μｍの熱可塑性樹脂ポリエチレン（日本ユニカー製、ＰＥＳ−２０、添加剤フリー）を用いて、株式会社徳寿工作所製のシータ・コンポーザ装置を使用して、１５分間、遠心力による加圧を行って母粒子の表面に子粒子を固定化させ、ケイ酸チタニウム６０体積％、ポリエチレン４０体積％の吸着剤を造粒した。得られた吸着剤の粒径は１５０〜８００μｍであり、平均粒径は５００μｍであった。 Fine particles of titanium silicate (ATS powder standard, manufactured by Engelhard Inc.) having a particle size of 10 to 30 μm and an average particle size of 20 μm as child particles, and thermoplastic resin polyethylene having a particle size of 100 to 750 μm and an average particle size of 420 μm as mother particles ( Using Nihon Unicar, PES-20, additive-free), using a theta composer device manufactured by Tokuju Kogyo Co., Ltd., pressurizing with centrifugal force for 15 minutes, the child particles on the surface of the mother particles Then, an adsorbent of 60 volume% titanium silicate and 40 volume% polyethylene was granulated. The obtained adsorbent had a particle size of 150 to 800 μm and an average particle size of 500 μm.
＜鉛吸着試験＞
得られた吸着剤を用いて、鉛吸着試験を以下のように実施した。
硝酸鉛水溶液を鉛濃度２００ｍｇ／Ｌとなるようにを調製し、三角フラスコに２００ｍｌ分取した。次に浄水器用吸着剤１００ｍｇを添加し、振とうさせた後、２４時間後にポアサイズ０.２２μｍのセルロース製フィルターで濾過し、濾液水中の残留鉛濃度を測定した。結果を表１に示す。
<Lead adsorption test>
Using the obtained adsorbent, a lead adsorption test was performed as follows.
A lead nitrate aqueous solution was prepared to have a lead concentration of 200 mg / L, and 200 ml was collected in an Erlenmeyer flask. Next, 100 mg of an adsorbent for water purifier was added and shaken, and after 24 hours, it was filtered with a cellulose filter having a pore size of 0.22 μm, and the residual lead concentration in the filtrate water was measured. The results are shown in Table 1.
＜浄水器通水試験＞
図１に示した構成の浄水器において、第１の浄水槽２に、作成した吸着剤１０ｇと活性炭４０ｇとを混合した吸着剤積層物４を配置し、１５０メッシュのナイロン網を貼付した樹脂枠３及び５を設置して吸着剤積層物４が流出しないようにした。
<Water purifier water flow test>
In the water purifier having the configuration shown in FIG. 1, a resin frame in which an adsorbent laminate 4 in which 10 g of the adsorbent prepared and 40 g of activated carbon is mixed is disposed in the first water purifier 2 and a 150 mesh nylon net is pasted. 3 and 5 were installed so that the adsorbent laminate 4 would not flow out.
第２の浄水槽７には、親水化処理を施したポリエチレン製多孔質中空糸膜８を２液型ポリウレタン樹脂で固定し、一端を切断開放したものを配置し、第１の浄水槽２と第２の浄水槽７をつなぐ配水管１２の途中に、流量センサー９を設置した。 In the second water purification tank 7, a polyethylene porous hollow fiber membrane 8 that has been subjected to a hydrophilic treatment is fixed with a two-component polyurethane resin, one end of which is cut open, and the first water purification tank 2. A flow rate sensor 9 was installed in the middle of the water distribution pipe 12 connecting the second water purification tank 7.
そして、水道水に硝酸鉛を添加し、鉛濃度として５０μｇ／Ｌに調整した水を通水速度２Ｌ／分で入口６より通水した。通水した水のｐＨは６．６〜７．４の範囲とした。
通水開始から２ｍ３通水した時の流出水中の鉛濃度を測定した。結果を表１に示す。
Then, lead nitrate was added to the tap water, and water adjusted to a lead concentration of 50 μg / L was passed through the inlet 6 at a water flow rate of 2 L / min. The pH of the passed water was in the range of 6.6 to 7.4.
The lead concentration in the effluent at the time of 2m 3 water flow from the water passing start was measured. The results are shown in Table 1.
＜比較例１＞
粒径１５０〜８００μｍ、平均粒径５００μｍのケイ酸チタニウム（エンゲルハード社製、ＡＴＳ granules）の顆粒品について、実施例１と同様の条件にて鉛吸着試験、及び浄水器通水試験を行った。それぞれの結果を表１に示す。
<Comparative Example 1>
About the granule of titanium silicate (the Engelhard company make, ATS granules) with a particle size of 150-800 micrometers and an average particle diameter of 500 micrometers, the lead adsorption test and the water purifier water flow test were done on the same conditions as Example 1. . The results are shown in Table 1.
以上の結果のように、本発明の吸着剤は、鉛など重金属が除去された安全な水を長期に亘って得ることができる点で優れていることがわかる。 As can be seen from the above results, the adsorbent of the present invention is excellent in that it can obtain safe water from which heavy metals such as lead are removed over a long period of time.
１ 外容器
２ 第１の浄水槽
３、５ 樹脂枠（ナイロン網）
４ 吸着剤積層物
６ 入口
７ 第２の浄水槽
８ 多孔質中空糸膜
９ 流量センサー
１１ 吐水口
１２ 配水管
1 Outer container 2 First water purification tank 3, 5 Resin frame (nylon net)
4 Adsorbent laminate 6 Inlet 7 Second water purification tank 8 Porous hollow fiber membrane 9 Flow rate sensor 11 Water outlet 12 Water distribution pipe
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013059717A (en) * | 2011-09-12 | 2013-04-04 | Toda Kogyo Corp | Ion adsorbent and method for producing the same |
| JP2020163270A (en) * | 2019-03-29 | 2020-10-08 | 株式会社クラレ | Heavy metal removal agent, adsorbent using the same, molded body, and water purifier |
| WO2020203588A1 (en) * | 2019-03-29 | 2020-10-08 | 株式会社クラレ | Adsorbent, heavy metal removing agent, molded body using same, and water purifier |
| JP2020163269A (en) * | 2019-03-29 | 2020-10-08 | 株式会社クラレ | Adsorbent, molded body using the same, and water purifier |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07194970A (en) * | 1993-10-05 | 1995-08-01 | Asahi Optical Co Ltd | Granular polymer composite and production thereof |
| JPH0919636A (en) * | 1995-05-01 | 1997-01-21 | Fujikura Kasei Co Ltd | Polymer absorbing halogenated hydrocarbon solvent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07194970A (en) * | 1993-10-05 | 1995-08-01 | Asahi Optical Co Ltd | Granular polymer composite and production thereof |
| JPH0919636A (en) * | 1995-05-01 | 1997-01-21 | Fujikura Kasei Co Ltd | Polymer absorbing halogenated hydrocarbon solvent |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013059717A (en) * | 2011-09-12 | 2013-04-04 | Toda Kogyo Corp | Ion adsorbent and method for producing the same |
| JP2020163270A (en) * | 2019-03-29 | 2020-10-08 | 株式会社クラレ | Heavy metal removal agent, adsorbent using the same, molded body, and water purifier |
| WO2020203588A1 (en) * | 2019-03-29 | 2020-10-08 | 株式会社クラレ | Adsorbent, heavy metal removing agent, molded body using same, and water purifier |
| JP2020163269A (en) * | 2019-03-29 | 2020-10-08 | 株式会社クラレ | Adsorbent, molded body using the same, and water purifier |
| JP7264692B2 (en) | 2019-03-29 | 2023-04-25 | 株式会社クラレ | Heavy metal remover, and adsorbent, compact and water purifier using same |
| JP7264691B2 (en) | 2019-03-29 | 2023-04-25 | 株式会社クラレ | Adsorbent, molded article and water purifier using the same |
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