JP2000218261A - Method for removing heavy metal - Google Patents
Method for removing heavy metalInfo
- Publication number
- JP2000218261A JP2000218261A JP11018233A JP1823399A JP2000218261A JP 2000218261 A JP2000218261 A JP 2000218261A JP 11018233 A JP11018233 A JP 11018233A JP 1823399 A JP1823399 A JP 1823399A JP 2000218261 A JP2000218261 A JP 2000218261A
- Authority
- JP
- Japan
- Prior art keywords
- soil
- heavy metals
- electrode
- heavy metal
- adsorbent
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、土壌中に含まれる
重金属を除去する方法に関するものである。TECHNICAL FIELD The present invention relates to a method for removing heavy metals contained in soil.
【０００２】[0002]
【従来の技術】 土壌を汚染する有害金属としてＰｂ、
Ｃｒ、Ｃｄ、Ｃｕなどの重金属が挙げられる。これら重
金属は、工場排水、生活排水等が土壌へ流入したり、上
下水道の汚泥や湖沼の底泥等を還元使用したりすること
で、土壌中に残留し、自然賦存量を越えた重金属濃度と
なる場合がある。このように多量な重金属が残留する
と、土壌の生態系を破壊し、土壌に生息する植物、土壌
生物、ひいては人体までに悪影響を及ぼすものといわれ
ている。2. Description of the Related Art Pb, which is a harmful metal that contaminates soil,
Heavy metals such as Cr, Cd, and Cu are included. These heavy metals remain in the soil due to the influx of industrial wastewater and domestic wastewater into the soil, and the reduction and use of sludge from water and sewage systems and the bottom mud of lakes and marshes. It may be. It is said that such a large amount of heavy metal remaining destroys the ecosystem of the soil and adversely affects plants, soil organisms, and even the human body that inhabit the soil.
【０００３】そのため、重金属による土壌汚染対策の一
つとして、土壌中の重金属を、植物や土壌生物に摂取さ
れないような金属化合物に変える方法が採られている。
即ち、重金属を不溶化状態にするために、生石灰やリン
酸塩を土壌に投与するものである。この対策では重金属
が不溶化状態となっているので植物等の摂取は防止され
るものの、重金属自体は土壌中から除去されないため、
汚染前の状態に土壌を回復させるものではない。[0003] Therefore, as one of the measures against soil contamination by heavy metals, a method has been adopted in which heavy metals in soil are converted into metal compounds that are not taken up by plants or soil organisms.
That is, quick lime or phosphate is administered to soil in order to make heavy metals insoluble. This measure prevents the ingestion of plants, etc., because the heavy metals are insolubilized, but the heavy metals themselves are not removed from the soil,
It does not restore the soil to its pre-contamination state.
【０００４】また、汚染土壌から重金属を除去する方法
としては、例えば、金属イオン補足剤を混入した水溶液
中に、汚染土壌を投入し撹拌することで重金属を沈殿除
去したり、汚染土壌を水性スラリーとし、その中に金属
イオン補足剤を混合して、重金属を沈殿除去するものが
ある。しかしながら、このような除去方法では、基本的
に所定量の土壌を採取して処理槽内で行うため、処理対
象である汚染土壌を除去設備まで運搬するか、汚染され
ている地域ごとに除去設備を設ける必要があり、様々な
地域で汚染されている土壌を処理する場合には必ずしも
好ましいものとはいえない。そして、この除去方法で
は、水溶液中で沈殿処理を行うものであるため大量の汚
染土壌を処理するには、大規模な除去設備を必要とし、
経済的にも好ましいものとはいえない。As a method for removing heavy metals from contaminated soil, for example, the contaminated soil is put into an aqueous solution mixed with a metal ion scavenger and stirred to precipitate and remove the heavy metals, or the contaminated soil is removed from an aqueous slurry. Some of them mix a metal ion scavenger to precipitate and remove heavy metals. However, in such a removal method, basically, a predetermined amount of soil is collected and carried out in a treatment tank. Therefore, contaminated soil to be treated is transported to a removal facility or a removal facility is provided for each contaminated area. It is not necessarily preferable when treating soil contaminated in various areas. In this removal method, a large-scale removal facility is required to treat a large amount of contaminated soil because the precipitation treatment is performed in an aqueous solution.
It is not economically favorable.
【０００５】更に、上下水道の汚泥や都市ゴミ処理の結
果生じるコンポストにも、比較的多量な重金属を含んで
いることが指摘されており、これらが畑地等に還元使用
されることにより重金属による土壌汚染が拡散する問題
がある。このような上下水道の汚泥から重金属を除去す
る技術については、本発明者の知る限りにおいても効率
的なものがなく、湖沼等の底泥における重金属除去と同
様に早期に解決すべき課題とされている。[0005] Furthermore, it has been pointed out that compost resulting from the treatment of water and sewage sludge and municipal garbage also contains a relatively large amount of heavy metals. There is a problem of spreading contamination. As far as the present inventor knows, there is no efficient technology for removing heavy metals from sludge of water and sewage systems, and it is considered to be an issue to be solved as early as heavy metal removal in bottom mud such as lakes and marshes. ing.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、以上のよう
な事情を背景になされたもので、様々な地域の汚染土壌
に対して直接的かつ簡易的に適用でき、経済的にも大き
な負担を伴うことなく、また、汚泥に含まれる重金属を
も効率的に除去できる方法を提供せんとするものであ
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and can be directly and simply applied to contaminated soil in various areas, and has a large economical burden. It is an object of the present invention to provide a method capable of efficiently removing heavy metals contained in sludge without accompanying the sludge.
【０００７】[0007]
【課題を解決するための手段】上記の課題を解決するた
めに、本発明では、重金属で汚染された土壌に土壌用電
極を配置するとともに吸着材で周囲を覆われた誘引用電
極を該土壌と隣接するように配置し、錯化剤を該土壌へ
混入することで重金属を錯化させた状態にし、土壌用電
極と誘引用電極との間に電位差を与えることにより、土
壌中の錯化された重金属を誘引用電極方向に移動を促進
させ、吸着材で捕捉するようにした。In order to solve the above-mentioned problems, in the present invention, a soil electrode is disposed on soil contaminated with heavy metals, and an attracting electrode whose periphery is covered with an adsorbent is provided on the soil. And a complexing agent mixed into the soil by mixing the complexing agent into the soil to provide a potential difference between the soil electrode and the attracting electrode. The moved heavy metal was promoted in the direction of the attracting electrode, and was captured by the adsorbent.
【０００８】通常、土壌中の重金属は自由に移動できる
状態ではないが、本発明のように重金属を錯体にして土
壌へ電位差を与えると、比較的容易に土壌内を移動でき
るようになる。即ち、錯体の極性と電位差とにより、土
壌中での重金属の移動を促進し、吸着材により錯体とな
った重金属を捕捉することができるのである。本発明で
は、土壌中の重金属を直接移動させ、吸着材で捕捉する
ものであるから、汚染土壌に直接的に適用して除去処理
を行うことができる。本発明における重金属除去方法を
行う場合、土壌用電極及び誘引用電極の配置と土壌への
錯化剤の混入との順序は、特に前後しても構わない。そ
れは、順序が異なったとしても、土壌中の重金属が錯化
された状態で、土壌に電位差が与えらる状態が実現され
ておれば、重金属の除去が行えるからである。In general, heavy metals in soil are not in a state where they can move freely. However, when a heavy metal is complexed to give a potential difference to soil as in the present invention, the metal can move in the soil relatively easily. That is, the movement of the heavy metal in the soil is promoted by the polarity and the potential difference of the complex, and the heavy metal complexed by the adsorbent can be captured. In the present invention, since the heavy metal in the soil is directly moved and captured by the adsorbent, the removal treatment can be performed by directly applying the heavy metal to the contaminated soil. When performing the heavy metal removal method in the present invention, the order of the arrangement of the soil electrode and the attracting electrode and the mixing of the complexing agent into the soil may be changed in particular. This is because, even if the order is different, heavy metals in the soil can be removed if a state in which a potential difference is given to the soil is realized in a complexed state.
【０００９】そして、本発明の重金属除去方法は、汚泥
のような多量の水分を含んでいる土壌に適用すると、水
分除去をも合わせて行うことが可能となる。即ち、汚泥
に電位差を与えることは、水の一部を電気分解すること
にもなるためである。従って、汚泥のような比較的水分
量の多い土壌に対して本発明の重金属除去方法を適用す
ると、重金属を除去すると共に水分量を減少できるの
で、除去処理後の汚泥の取り扱いも容易にすることがで
きる。When the method for removing heavy metals according to the present invention is applied to soil containing a large amount of water, such as sludge, it is possible to simultaneously remove water. That is, giving a potential difference to sludge also causes electrolysis of a part of water. Therefore, when the heavy metal removal method of the present invention is applied to soil having a relatively high moisture content such as sludge, the heavy metal can be removed and the moisture content can be reduced, so that the sludge after the removal treatment can be easily handled. Can be.
【００１０】本発明において、吸着材で覆われた誘引用
電極を土壌と隣接するように配置するとは、土壌と吸着
材との境界で錯化された重金属の移動を阻止したり、土
壌用電極と誘引用電極との導通性を妨げることないよう
に配置されること意味するものである。そして、本発明
における吸着材とは、錯化された重金属を吸着できる機
能を有しているものをいい、例えば、多孔質な鉱物や木
質材等が挙げられる。[0010] In the present invention, disposing the inviting electrode covered with the adsorbent so as to be adjacent to the soil means that the movement of heavy metal complexed at the boundary between the soil and the adsorbent is prevented, or the soil electrode is used. This means that they are arranged so as not to hinder the conductivity between the electrode and the reference electrode. The adsorbent in the present invention refers to an adsorbent having a function of adsorbing complexed heavy metals, and examples thereof include porous minerals and wood materials.
【００１１】本発明において用いる錯化剤は、重金属を
錯体とすることができる溶液であり、キレート溶液も含
むものである。土壌を汚染している重金属がＰｂ、Ｃ
ｒ、Ｃｄ、Ｃｕである場合には、錯化剤としてアンモニ
ア溶液やエチレンジアンミン四酢酸（ＥＤＴＡ）溶液を
用いることができる。特に、自然環境への影響を配慮す
る場合には、アンモニア溶液を用いることが好ましい。
アンモニアは、土壌中に残留しても土壌微生物によって
分解され硝酸化したり、植物や土壌微生物に吸着され再
び有機窒素化合物に変化されるので、土壌生態系への影
響が少ないためである。The complexing agent used in the present invention is a solution capable of forming a complex with a heavy metal, and includes a chelating solution. Heavy metals contaminating the soil are Pb and C
In the case of r, Cd, or Cu, an ammonia solution or an ethylenediamminetetraacetic acid (EDTA) solution can be used as a complexing agent. In particular, when considering the effect on the natural environment, it is preferable to use an ammonia solution.
This is because even if ammonia remains in the soil, it is decomposed and nitrated by soil microorganisms, or is adsorbed by plants and soil microorganisms and converted again into organic nitrogen compounds, and thus has little effect on soil ecosystems.
【００１２】本発明の重金属除去方法では、吸着材とし
て木炭を用いることが好ましく、特に、針葉樹を用いて
熱変換（炭化）した木炭を用いることがより好ましい。
木炭は多孔質で優れた吸着機能を有するものであり、さ
らに、針葉樹を炭化して得られる木炭は、広葉樹のもの
比較すると、木材繊維方向と直交する断面で均一な大き
さの細孔が形成され易く、錯体を吸着する能力が非常に
優れているからである。また、針葉樹を用いて熱変換
（炭化）して得られる木炭は、熱変換温度（炭化温度）
によって細孔サイズが変化するため、重金属の種類に応
じ、重金属を選別して吸着できる細孔を比較的容易に付
与することができる。従って、土壌中の重金属の種類に
合わせた細孔を付与した状態の木炭を使用すれば、土壌
中の特定の重金属を効率よく吸着して捕捉することが可
能となる。In the method for removing heavy metals of the present invention, it is preferable to use charcoal as the adsorbent, and it is particularly preferable to use charcoal thermally converted (carbonized) using conifers.
Charcoal is porous and has an excellent adsorption function.In addition, charcoal obtained by carbonizing softwood has pores of uniform size in a cross section orthogonal to the direction of wood fiber, compared to that of hardwood. This is because they are easily performed and the ability to adsorb the complex is very excellent. In addition, charcoal obtained by heat conversion (carbonization) using softwood has a heat conversion temperature (carbonization temperature).
Since the pore size changes depending on the type of heavy metal, pores capable of selecting and adsorbing heavy metals can be provided relatively easily. Therefore, by using charcoal in a state in which pores corresponding to the type of heavy metal in soil are used, it becomes possible to efficiently adsorb and capture a specific heavy metal in soil.
【００１３】[0013]
【発明の実施の形態】以下、本発明の重金属除去方法を
用いた最適と思われる発明の実施形態について説明す
る。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the invention which is considered to be optimal using the heavy metal removing method of the present invention will be described.
【００１４】第一実施形態： 第一実施形態は、重金属
で汚染された土地に直接適用するのに好適な本発明の重
金属除去方法を示すものである。図１及び図２には、第
一実施形態における土壌断面図及び土壌平面図を示して
いる。先ず、重金属に汚染された土地Ｇに、約１ｍ深さ
の直方体状の吸着区画部１となる穴を処理土壌２を挟む
ように対向して２箇所に形成した。吸着区画部１は、処
理土壌２から吸着区画部１へ液体の移動が可能な濾過板
３を処理土壌２側に配置され、吸着区画部１の底側には
排水室４が形成されるよう網板５を設けた。また、吸着
区画部１及び処理土壌２の外周及び底部には、防水材６
を配置することにより外側の土壌と隔離されるようにし
た。First Embodiment A first embodiment shows a method for removing heavy metals according to the present invention, which is suitable for directly applying to land contaminated with heavy metals. 1 and 2 show a soil sectional view and a soil plan view in the first embodiment. First, in the land G contaminated with heavy metals, holes serving as a rectangular parallelepiped adsorption compartment 1 having a depth of about 1 m were formed at two locations facing each other with the treated soil 2 interposed therebetween. In the adsorption section 1, a filter plate 3 capable of moving liquid from the treatment soil 2 to the adsorption section 1 is disposed on the treatment soil 2 side, and a drainage chamber 4 is formed at the bottom side of the adsorption section 1. A mesh plate 5 was provided. Further, a waterproof material 6 is provided on the outer periphery and the bottom of the adsorption compartment 1 and the treated soil 2.
Was arranged to be isolated from the outside soil.
【００１５】吸着区画部１には、針葉樹を約６００℃、
２時間で熱変換（炭化）し、直径１ｍｍ程度の大きさに
粉砕した木炭７を充填した。吸着区画部１及び処理土壌
２には、網板５近傍深さまでの長さを有する金属板を電
極として挿入し、吸着区画部１の方が正極８、処理土壌
２の方が負極９となるように図示せぬ供給電源と接続し
た。In the adsorbing section 1, conifers are heated at about 600 ° C.
Charcoal 7 which was thermally converted (carbonized) for 2 hours and pulverized to a size of about 1 mm in diameter was filled. A metal plate having a length up to the depth near the mesh plate 5 is inserted as an electrode into the adsorption compartment 1 and the treated soil 2, and the adsorption compartment 1 becomes the positive electrode 8 and the treated soil 2 becomes the negative electrode 9. As shown in FIG.
【００１６】錯化剤はアンモニア水（０．２Ｎ濃度）を
用い、土壌容量１００部に対して錯化剤の容量で３０部
相当を、処理土壌２上方のスプレー１０により散布して
処理土壌２へ混入した。そして、電極間には、約３Ｖの
定電圧を与え、電位差が処理土壌２内に生じるようにし
た。錯化剤は４時間置きに散布し、この状態で約４８時
間処理して重金属除去処理を行った。排水室４に流出し
てくる液体は、排水室４に接続した図示せぬ吸引ポンプ
を使用することにより回収した。４８時間経過後、処理
土壌２上方のスプレー１０より水を散布し、１日間放置
後、処理土壌２内の水分（液体）を排水室４に流出さ
せ、その後、吸着区画部１の木炭７を回収し、処理土壌
２中の重金属濃度を測定した。Ammonia water (0.2N concentration) is used as the complexing agent, and the equivalent of 30 parts by volume of the complexing agent is sprayed by a spray 10 above the treated soil 2 with respect to 100 parts of the soil volume. Mixed in. A constant voltage of about 3 V was applied between the electrodes so that a potential difference was generated in the treated soil 2. The complexing agent was sprayed every 4 hours, and treated in this state for about 48 hours to remove heavy metals. The liquid flowing into the drainage chamber 4 was collected by using a suction pump (not shown) connected to the drainage chamber 4. After a lapse of 48 hours, water is sprayed from the spray 10 above the treated soil 2 and left for one day, and then water (liquid) in the treated soil 2 is allowed to flow out to the drainage chamber 4. Collected, the heavy metal concentration in the treated soil 2 was measured.
【００１７】第一実施形態で用いた汚染土壌の重金属初
期濃度は、Ｃｒ ５３ｍｇ／ｋｇ乾土、Ｃｕ ６８ｍｇ
／ｋｇ乾土、Ｃｄ ７ｍｇ／ｋｇ乾土の状態であった。
そして、第一実施形態での重金属除去処理を行った結
果、処理土壌２中の重金属濃度は、Ｃｒ６ｍｇ／ｋｇ乾
土、Ｃｕ１０ｍｇ／ｋｇ乾土、Ｃｄ０．５ｍｇ／乾土ま
で減少していることが確認された。The initial concentration of heavy metals in the contaminated soil used in the first embodiment was 53 mg / kg Cr, 68 mg Cu,
/ Kg dry soil, Cd 7 mg / kg dry soil.
Then, as a result of performing the heavy metal removal treatment in the first embodiment, the heavy metal concentration in the treated soil 2 is reduced to 6 mg / kg dry soil, 10 mg / kg dry soil, and 0.5 mg Cd / dry soil. confirmed.
【００１８】第二実施形態： 第二実施形態は、比較的
大量の土壌を処理する場合或いは汚泥のような比較的水
分量の多い土壌を処理する場合に好適な本発明の重金属
除去方法である。第二実施形態は、図３に示すような土
壌充填槽１１と木炭吸着槽１２とを交互に複数連結して
なる重金属除去装置１３を用いるものである。土壌充填
槽１１は約３ｍ３の容量で、土壌充填槽１１に隣接して
設置される木炭吸着槽１２は約１ｍ３の容量の各槽を交
互に配置されるよう形成した。各土壌充填槽１１と各木
炭吸着槽１２の壁面１４及び底面１５は防水材を内張り
したコンクリートによって形成されており、土壌充填槽
１１と木炭吸着槽１２との隣接する境界は、液体が両槽
間を移動できるように濾過板１６で仕切るものとした。
また、木炭吸着槽１２の底側には、液体の流下できる網
板１７を設け、排水室１８が形成されるようにした。土
壌充填槽１１には重金属を含む処理土壌１９を充填し、
木炭吸着槽１２には第一実施形態のものと同様の木炭２
０を充填した。さらに、土壌充填槽１１と木炭吸着槽１
２の各々には、金属板の電極を各一枚づつ挿入し、図３
のように交互に負極２１、正極２２となるようにし、図
示せぬ供給電源と接続して配置した。Second Embodiment The second embodiment is a method for removing heavy metals according to the present invention, which is suitable for treating a relatively large amount of soil or treating a soil having a relatively high moisture content such as sludge. . The second embodiment uses a heavy metal removing device 13 formed by alternately connecting a plurality of soil filling tanks 11 and charcoal adsorption tanks 12 as shown in FIG. The soil filling tank 11 had a capacity of about 3 m 3 , and the charcoal adsorption tank 12 installed adjacent to the soil filling tank 11 was formed so that each tank having a capacity of about 1 m 3 was alternately arranged. The wall surface 14 and the bottom surface 15 of each soil filling tank 11 and each charcoal adsorption tank 12 are formed of concrete lined with a waterproof material. The filter plate 16 was used so that the space could be moved.
On the bottom side of the charcoal adsorption tank 12, a mesh plate 17 through which liquid can flow down is provided, and a drainage chamber 18 is formed. The soil filling tank 11 is filled with the treated soil 19 containing a heavy metal,
The charcoal adsorption tank 12 has a charcoal 2 similar to that of the first embodiment.
0 was filled. Furthermore, the soil filling tank 11 and the charcoal adsorption tank 1
2 is inserted into each of the metal plate electrodes one by one.
And alternately become a negative electrode 21 and a positive electrode 22 as shown in FIG.
【００１９】錯化剤としては、第一実施形態と同様のア
ンモニア水（０．２Ｎ濃度）を用い、土壌容量１００部
に対して錯化剤の容量で３０部相当を、土壌充填槽１１
上方のスプレー２３より散布することで処理土壌１９に
混入させた。電極間には、約５Ｖの定電圧を与え、電位
差が生じるようにした。錯化剤は４時間置きに散布し、
この状態で約４８時間の重金属除去処理を行った。網板
１７を通過して排水室１８に流出してくる液体は、排水
室１８に接続した図示せぬ吸引ポンプを使用することに
より回収した。４８時間経過後、土壌充填槽１１上方の
スプレー２３より水を散布し、１日間放置して土壌充填
槽１１内の水分（液体）を排水室１８へ流出させ、その
後、土壌充填槽１１内にある処理土壌１９の重金属濃度
を測定した。As the complexing agent, the same ammonia water (0.2 N concentration) as in the first embodiment was used.
It was mixed with the treated soil 19 by spraying from the upper spray 23. A constant voltage of about 5 V was applied between the electrodes to generate a potential difference. Sprinkle the complexing agent every 4 hours,
In this state, a heavy metal removal treatment was performed for about 48 hours. The liquid flowing through the net plate 17 and flowing out to the drainage chamber 18 was collected by using a suction pump (not shown) connected to the drainage chamber 18. After a lapse of 48 hours, water is sprayed from the spray 23 above the soil filling tank 11 and left for one day to allow the water (liquid) in the soil filling tank 11 to flow out to the drainage chamber 18, and then into the soil filling tank 11. The heavy metal concentration of a certain treated soil 19 was measured.
【００２０】第二実施形態で用いた汚染土壌の重金属初
期濃度は、Ｃｒ５３ｍｇ／ｋｇ乾土、Ｃｕ６８ｍｇ／ｋ
ｇ乾土、Ｃｄ７ｍｇ／ｋｇ乾土の状態であった。そし
て、第二実施形態による重金属除去処理を行った結果、
処理土壌中の重金属濃度は、Ｃｒ６ｍｇ／ｋｇ乾土、Ｃ
ｕ１０ｍｇ／ｋｇ乾土、Ｃｄ０．５ｍｇ／乾土まで減少
していることが確認された。The initial concentration of heavy metals in the contaminated soil used in the second embodiment was 53 mg / kg Cr, 68 mg / k Cu
g dry soil and Cd 7 mg / kg dry soil. And as a result of performing the heavy metal removal treatment according to the second embodiment,
The heavy metal concentration in the treated soil was Cr 6 mg / kg dry soil, C
It was confirmed that u decreased to 10 mg / kg dry soil and Cd to 0.5 mg / dry soil.
【００２１】[0021]
【発明の効果】以上説明したように本発明による重金属
除去方法によると、重金属で汚染された様々な地域の土
壌に対して、その場所で直接的且つ簡易的に適用でき、
経済的にも大きな負担を伴わず、土壌中から重金属を除
去することができる。そして、汚泥のような水分を多く
含む土壌からも効率的に重金属を除去することができ、
汚泥の水分をも同時に減少させることが可能となる。As described above, according to the method for removing heavy metals according to the present invention, the method can be applied directly and simply to soils in various areas contaminated with heavy metals,
Heavy metals can be removed from the soil without a great economic burden. And, heavy metals can be efficiently removed from soil containing much moisture such as sludge,
At the same time, the water content of the sludge can be reduced.
【図１】第一実施形態における土壌断面図。FIG. 1 is a sectional view of a soil according to a first embodiment.
【図２】第一実施形態における土壌平面図。FIG. 2 is a soil plan view according to the first embodiment.
【図３】第二実施形態における重金属除去装置の断面概
略図。FIG. 3 is a schematic cross-sectional view of a heavy metal removing device according to a second embodiment.
１ 吸着区画部 ２ 処理土壌 ３ 濾過板 ４、１８ 排水室 ５、１７ 網板 ６ 防水材 ７、２０ 木炭 ８、２２ 正極 ９、２１ 負極 １０、２３ スプレー １１ 土壌充填槽 １２ 木炭吸着槽 Ｇ 土地 Reference Signs List 1 adsorption section 2 treated soil 3 filter plate 4, 18 drainage room 5, 17 mesh plate 6 waterproof material 7, 20 charcoal 8, 22 positive electrode 9, 21 negative electrode 10, 23 spray 11 soil filling tank 12 charcoal adsorption tank G land
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4D004 AA02 AA41 AB03 AC07 CA34 CA44 CA47 CC03 CC06 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D004 AA02 AA41 AB03 AC07 CA34 CA44 CA47 CC03 CC06
Claims (2)
配置するとともに吸着材で周囲を覆われた誘引用電極を
該土壌と隣接するように配置し、錯化剤を該土壌へ混入
することで重金属を錯化させた状態にし、土壌用電極と
誘引用電極との間に電位差を与えることにより、土壌中
の錯化された重金属を誘引用電極方向に移動を促進さ
せ、吸着材で捕捉するようにしたものである重金属除去
方法。1. An electrode for soil is placed on soil contaminated with heavy metals, and an attracting electrode whose periphery is covered with an adsorbent is placed adjacent to the soil, and a complexing agent is mixed into the soil. By putting the heavy metal in a complexed state by applying a potential difference between the soil electrode and the attracting electrode, the complexed heavy metal in the soil is promoted to move toward the attracting electrode, and is adsorbed by the adsorbent. A method for removing heavy metals which is intended to be captured.
重金属除去方法。2. The method for removing heavy metals according to claim 1, wherein the adsorbent is charcoal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11018233A JP2000218261A (en) | 1999-01-27 | 1999-01-27 | Method for removing heavy metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11018233A JP2000218261A (en) | 1999-01-27 | 1999-01-27 | Method for removing heavy metal |
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| Publication Number | Publication Date |
|---|---|
| JP2000218261A true JP2000218261A (en) | 2000-08-08 |
Family
ID=11965966
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11018233A Pending JP2000218261A (en) | 1999-01-27 | 1999-01-27 | Method for removing heavy metal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100369711B1 (en) * | 2000-09-15 | 2003-01-30 | 광주과학기술원 | Electrochemical process for removal of toxic heavy metals in sludges |
| CN102513344A (en) * | 2012-01-04 | 2012-06-27 | 大恩(天津)环境技术研发有限公司 | Novel method for remedying heavy-metal contaminated soil with electrodynamics |
| US20120208261A1 (en) * | 2011-02-11 | 2012-08-16 | Earth Renaissance Technologies Llc | Method of removing heavy metals in soils and water |
| CN103316909A (en) * | 2013-07-05 | 2013-09-25 | 华北电力大学 | Electrodynamic remediation device and method for soil polluted by heavy metal or organic matters |
| CN104368594A (en) * | 2014-09-01 | 2015-02-25 | 华北电力大学 | Decaying periodic soil repair method |
| CN104624628A (en) * | 2014-12-09 | 2015-05-20 | 东南大学 | System and method for removing heavy metals by using microbial fuel cell established in soil |
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| CN105170620A (en) * | 2015-09-30 | 2015-12-23 | 河南行知专利服务有限公司 | Method for restoring heavy metal contaminated soil through cooperation of magnetic activated carbon and activating agent |
| JP2017136515A (en) * | 2016-02-01 | 2017-08-10 | 国立大学法人秋田大学 | Apparatus and method for decontaminating contaminated earth |
| CN107755419A (en) * | 2016-08-19 | 2018-03-06 | 常州大学 | A kind of electro reclamation device for removing heavy metal in soil |
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1999
- 1999-01-27 JP JP11018233A patent/JP2000218261A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100369711B1 (en) * | 2000-09-15 | 2003-01-30 | 광주과학기술원 | Electrochemical process for removal of toxic heavy metals in sludges |
| US20120208261A1 (en) * | 2011-02-11 | 2012-08-16 | Earth Renaissance Technologies Llc | Method of removing heavy metals in soils and water |
| US8702986B2 (en) * | 2011-02-11 | 2014-04-22 | Earth Renaissance Technologies, Llc | Method of removing heavy metals in soils and water |
| CN102513344A (en) * | 2012-01-04 | 2012-06-27 | 大恩(天津)环境技术研发有限公司 | Novel method for remedying heavy-metal contaminated soil with electrodynamics |
| CN103316909A (en) * | 2013-07-05 | 2013-09-25 | 华北电力大学 | Electrodynamic remediation device and method for soil polluted by heavy metal or organic matters |
| JP2015099105A (en) * | 2013-11-20 | 2015-05-28 | 国立大学法人 香川大学 | Decontamination apparatus and decontamination method for soil containing radioactive substances |
| CN104368594A (en) * | 2014-09-01 | 2015-02-25 | 华北电力大学 | Decaying periodic soil repair method |
| CN104624628A (en) * | 2014-12-09 | 2015-05-20 | 东南大学 | System and method for removing heavy metals by using microbial fuel cell established in soil |
| CN105170622A (en) * | 2015-09-30 | 2015-12-23 | 河南行知专利服务有限公司 | Method for recovering acid-heavy metal contaminated soil |
| CN105170620A (en) * | 2015-09-30 | 2015-12-23 | 河南行知专利服务有限公司 | Method for restoring heavy metal contaminated soil through cooperation of magnetic activated carbon and activating agent |
| JP2017136515A (en) * | 2016-02-01 | 2017-08-10 | 国立大学法人秋田大学 | Apparatus and method for decontaminating contaminated earth |
| CN107755419A (en) * | 2016-08-19 | 2018-03-06 | 常州大学 | A kind of electro reclamation device for removing heavy metal in soil |
| CN111804727A (en) * | 2020-06-29 | 2020-10-23 | 北京泷涛环境修复有限公司 | Method for treating antimony-polluted soil |
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