JP2003112162A - Polluted soil cleaning method - Google Patents
Polluted soil cleaning methodInfo
- Publication number
- JP2003112162A JP2003112162A JP2001309944A JP2001309944A JP2003112162A JP 2003112162 A JP2003112162 A JP 2003112162A JP 2001309944 A JP2001309944 A JP 2001309944A JP 2001309944 A JP2001309944 A JP 2001309944A JP 2003112162 A JP2003112162 A JP 2003112162A
- Authority
- JP
- Japan
- Prior art keywords
- arsenic
- iron compound
- polluted soil
- soil
- schwertmannite
- 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
- 239000002689 soil Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims description 10
- 238000004140 cleaning Methods 0.000 title abstract 2
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 49
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 49
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 30
- 150000002506 iron compounds Chemical class 0.000 claims abstract description 25
- 230000002194 synthesizing effect Effects 0.000 claims abstract description 11
- 229910052598 goethite Inorganic materials 0.000 claims abstract description 9
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 claims abstract description 9
- 229910052935 jarosite Inorganic materials 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000000746 purification Methods 0.000 claims 1
- 238000003786 synthesis reaction Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 6
- 230000003100 immobilizing effect Effects 0.000 abstract 1
- 239000006228 supernatant Substances 0.000 description 14
- 102100033041 Carbonic anhydrase 13 Human genes 0.000 description 9
- 101000867860 Homo sapiens Carbonic anhydrase 13 Proteins 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000008635 plant growth Effects 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical compound [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- -1 schwertmannite Chemical class 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 241000694440 Colpidium aqueous Species 0.000 description 1
- 101100219325 Phaseolus vulgaris BA13 gene Proteins 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000021962 pH elevation Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
- Removal Of Specific Substances (AREA)
- Extraction Or Liquid Replacement (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、汚染土壌の浄化方
法、さらに詳しくは、汚染土壌中に含有される砒素や重
金属を不動態化して汚染土壌を浄化する汚染土壌の浄化
方法に関する。TECHNICAL FIELD The present invention relates to a method for purifying contaminated soil, and more particularly to a method for purifying contaminated soil by passivating arsenic and heavy metals contained in the contaminated soil to purify the contaminated soil.
【０００２】[0002]
【従来の技術】土壌の性質は、植物の生育にとって重要
な影響を及ぼすものである。BACKGROUND OF THE INVENTION The nature of soil has an important influence on the growth of plants.
【０００３】たとえば植物の生育に必要な養分を含んで
いること、ｐＨが適正値であること等は重要な条件であ
り、樹木等が生育している自然土壌では、このような条
件は当然のことながら満たされている。For example, it is an important condition that the nutrients necessary for the growth of plants are contained and that the pH is an appropriate value. In natural soil where trees and the like grow, such conditions are natural. Being satisfied while being.
【０００４】[0004]
【発明が解決しようとする課題】ところが、近年では自
然環境の破壊等から、土壌汚染の問題が発生している。However, in recent years, the problem of soil pollution has arisen due to the destruction of the natural environment and the like.
【０００５】たとえば、建設廃土が多く存在する土壌で
は、ｐＨが高いアルカリ性の土壌となり、植物の生育に
適さないものとなっている。[0005] For example, the soil in which a large amount of construction waste soil is present is an alkaline soil having a high pH, which is not suitable for plant growth.
【０００６】このような土壌のアルカリ化は、植物の生
育に適さないという問題があるものの、有害な物質を含
んでいるわけではないので、ただちに人体や生態系への
影響を及ぼすわけではない。Although such soil alkalinization has a problem that it is not suitable for plant growth, it does not contain harmful substances and therefore does not immediately affect the human body or the ecosystem.
【０００７】しかし、近年では砒素や重金属を含有する
土壌の存在が報告されており、このような土壌では、人
体や周辺の生態系への影響を無視することができない。
特に砒素は毒性が極めて高いため、これを除去する必要
がある。However, in recent years, the presence of soil containing arsenic and heavy metals has been reported, and in such soil, the effect on the human body and the surrounding ecosystem cannot be ignored.
In particular, arsenic is extremely toxic and needs to be removed.
【０００８】本発明は、このような問題点を解決するた
めになされたもので、上記のような土壌から、砒素や重
金属等の有害物質を除去することを課題とする。The present invention has been made in order to solve such problems, and an object thereof is to remove harmful substances such as arsenic and heavy metals from the above-mentioned soil.
【０００９】[0009]
【課題を解決するための手段】本発明は、このような課
題を解決するためになされたもので、その課題を解決す
るための手段は、砒素又は重金属を含む汚染土壌に、化
学的に合成されたシュベルトマナイト、ゲータイト、ジ
ャロサイト、フェリハイドライトのいずれかの鉄化合物
を添加し、汚染土壌中の砒素又は重金属を前記鉄化合物
に収着させ、不動態化させることにより、汚染土壌を浄
化することである。The present invention has been made to solve such a problem, and a means for solving the problem is to chemically synthesize it in a contaminated soil containing arsenic or heavy metal. By adding any iron compound of schwertmannite, goethite, jarosite, ferrihydrite, sorbed arsenic or heavy metal in the contaminated soil to the iron compound, and passivating the contaminated soil. It is to purify.
【００１０】また他の手段は、砒素又は重金属を含む汚
染土壌から砒素又は重金属を抽出し、その抽出液に、シ
ュベルトマナイト、ゲータイト、ジャロサイト、フェリ
ハイドライトのいずれかの鉄化合物を合成しうる鉄化合
物合成資材を添加して、前記鉄化合物を合成するととも
に、抽出液中の砒素又は重金属を前記鉄化合物に収着さ
せ、不動態化させることにより、汚染土壌を浄化するこ
とである。Another means is to extract arsenic or heavy metal from a contaminated soil containing arsenic or heavy metal, and synthesize an iron compound of schwertmannite, goethite, jarosite or ferrihydrite in the extract. Is to purify the contaminated soil by adding an iron compound synthesizing material to synthesize the iron compound and sorbing arsenic or heavy metal in the extract to the iron compound to passivate it.
【００１１】[0011]
【実施例】以下、本発明の実施例について説明する。EXAMPLES Examples of the present invention will be described below.
【００１２】（実施例１）本実施例においては、シュベ
ルトマナイトを用いた。Example 1 In this example, Schwertmannite was used.
【００１３】シュベルトマナイトを合成する場合につい
て説明すると、先ず0.02ＭのＮａ2ＳＯ4溶液を２リット
ルを、60℃に加熱した。これに固体のＦｅ（ＮＯ3)2・
９Ｈ 2Ｏを添加した。60℃で12分間維持し、さらに冷却
し、ｐＨ３で保存した。これによって、シュベルトマナ
イトが合成された。In the case of synthesizing Schwertmannite
First, 0.02M Na2SOFour2 liters of solution
The oven was heated to 60 ° C. Solid Fe (NO3)2・
9H 2O was added. Hold at 60 ° C for 12 minutes, cool further
And stored at pH 3. This allows Schwertmana
Ito was synthesized.
【００１４】シュベルトマナイトの一般組成式は、次の
ように表される。
Ｆｅ16Ｏ16(ＯＨ)y(ＳＯ4)z・ｎＨ2Ｏ〔16−ｙ＝2z，2.
0 ≦z ≦3.5]
（J.M.Bigham et al.1994 ）The general composition formula of schwertmannite is expressed as follows. Fe 16 O 16 (OH) y (SO 4) z · nH 2 O [16-y = 2z, 2.
0 ≤ z ≤ 3.5] (JMBigham et al. 1994)
【００１５】或いは、一般組成式は次のようにも表され
る。
Ｆｅ8Ｏ8(ＯＨ)8−２ｘ（ＳＯ4)x 〔１≦ｘ≦1.75〕Alternatively, the general composition formula is also expressed as follows. Fe 8 O 8 (OH) 8 -2x (SO 4) x [1 ≦ x ≦ 1.75]
【００１６】またシュベルトマナイトの理想組成式は、
次のように表される。
Ｆｅ16Ｏ16(ＯＨ)12(ＳＯ4)2 The ideal composition formula of schwertmannite is
It is expressed as follows. Fe 16 O 16 (OH) 12 (SO 4 ) 2
【００１７】このようなシュベルトマナイトを、砒素を
含む土壌に添加した。Such Schwertmannite was added to soil containing arsenic.
【００１８】この結果、砒素がシュベルトマナイトに収
着され、不動態化されて、土壌から除去することができ
た。As a result, arsenic was sorbed on the Schwertmannite, was passivated and could be removed from the soil.
【００１９】このように砒素がシュベルトマナイトに収
着、不動態化される作用については必ずしも定かではな
いが、シュベルトマナイトの鉄表面官能基がヒ酸イオン
と表面錯体を形成し、或いはシュベルトマナイトのチャ
ンネル内ＳＯ4 がヒ酸イオンと置換されることによっ
て、砒素が不動態化されるものと推定される。Although the action of arsenic sorption and passivation on schwertmannite is not always clear, the iron surface functional group of schwertmannite forms a surface complex with arsenate ion, or Schwertmannite. It is presumed that arsenic is passivated by replacing SO 4 in the channel of manite with arsenate ion.
【００２０】（実施例２）本実施例では、資材としてＦ
ｅＣｌ3及びＮａ2ＳＯ4を用いた。(Embodiment 2) In this embodiment, F is used as a material.
eCl 3 and Na 2 SO 4 were used.
【００２１】ＦｅＣｌ3とＮａ2ＳＯ4とを、60℃水溶液
中でｐＨ２〜３の条件で反応させた。FeCl 3 and Na 2 SO 4 were reacted in a 60 ° C. aqueous solution at pH 2-3.
【００２２】沈殿物を濾過し採取するとともに、濾過物
を乾燥させた。これによって、シュベルトマナイトが得
られた。The precipitate was filtered and collected, and the filtrate was dried. As a result, schwertmannite was obtained.
【００２３】得られたシュベルトマナイトを、実施例１
と同様にして砒素を含む土壌に添加した。The obtained schwertmannite was used in Example 1.
Was added to the soil containing arsenic in the same manner as in.
【００２４】この結果、砒素がシュベルトマナイトに収
着され、不動態化されて、土壌から除去することができ
た。As a result, arsenic was sorbed on the Schwertmannite, was passivated and could be removed from the soil.
【００２５】（実施例３）本実施例では、土壌を重機等
で掘削し、プラントまで運送し、そのプラント内で処理
を行った。(Embodiment 3) In this embodiment, soil was excavated by a heavy machine, transported to a plant, and treated in the plant.
【００２６】具体的には、プラント内に土壌を入れ、酸
性に調整した水（若しくは水）と攪拌後、沈殿と上澄液
に分離し、溶出した砒素を上澄液として抽出する。Specifically, the soil is put in a plant, stirred with water (or water) adjusted to be acidic, and then separated into a precipitate and a supernatant liquid, and the eluted arsenic is extracted as a supernatant liquid.
【００２７】その上澄液に、上記実施例１で合成された
シュベルトマナイトを添加する。The schwertmannite synthesized in Example 1 above is added to the supernatant.
【００２８】その結果、上澄液中の砒素がシュベルトマ
ナイトに収着され、不動態化された。As a result, arsenic in the supernatant was sorbed on Schwertmannite and was passivated.
【００２９】尚、上澄液として抽出した時点で、砒素は
土壌から除去されてはいるが、上記のように上澄液中で
砒素を不動態化させることで、毒性の強い砒素が溶出す
るのを好適に防止することができる。Although arsenic has been removed from the soil at the time of extraction as a supernatant, highly toxic arsenic is eluted by passivating arsenic in the supernatant as described above. Can be preferably prevented.
【００３０】（実施例４）本実施例においても、上記実
施例３と同様に、土壌を重機等で掘削し、プラントまで
運送し、そのプラント内に土壌を入れ、水と攪拌後、沈
殿を上澄液に分離し、溶出した砒素を上澄液として抽出
した。(Embodiment 4) Also in this embodiment, as in the case of the above-described Embodiment 3, the soil is excavated by a heavy machine and transported to the plant, the soil is put into the plant, and the sediment is mixed with water after stirring. The supernatant was separated and the eluted arsenic was extracted as a supernatant.
【００３１】ただし、本実施例では、ＦｅＣｌ3とＮａ2
ＳＯ4とを資材として上澄液に添加した。上澄液は、60
℃でｐＨ２〜３の条件とした。However, in this embodiment, FeCl 3 and Na 2 are used.
SO 4 was added as a material to the supernatant. The supernatant is 60
The condition was pH 2 to 3 at ℃.
【００３２】これによって、上澄液中でシュベルトマナ
イトが合成されるとともに、そのシュベルトマナイトに
上澄液中の砒素が収着され、不動態化された。As a result, schwertmannite was synthesized in the supernatant, and arsenic in the supernatant was sorbed and passivated by the schwertmannite.
【００３３】本実施例においても、上澄液として抽出し
た時点で砒素は土壌から除去されてはいるが、上澄液中
で砒素を不動態化させることで、毒性の強い砒素が溶出
するのを好適に防止することができる。Also in this example, arsenic was removed from the soil at the time of extraction as a supernatant, but by arsenic passivation in the supernatant, highly toxic arsenic was eluted. Can be preferably prevented.
【００３４】（実施例５）本実施例では、上記各実施例
のシュベルトマナイトに代えて、フェリハイドライトを
用いた。Example 5 In this example, ferrihydrite was used in place of the schwertmannite in each of the above examples.
【００３５】フェリハイドライトを合成する場合につい
て説明すると、先ずＦｅ（ＮＯ3)2・９Ｈ2Ｏの40ｇを含
む溶液500ml に、１モルＫＯＨの310ml を、約100ml/分
の割合で加えた。反応中は攪拌を行った。Explaining the case of synthesizing ferrihydrite, first, to 500 ml of a solution containing 40 g of Fe (NO 3 ) 2 .9H 2 O, 310 ml of 1 mol KOH was added at a rate of about 100 ml / min. Stirring was performed during the reaction.
【００３６】懸濁液は、１モルＫＯＨを加えることによ
ってｐＨ7.5 に調整した。ｐＨが7.5 で安定した後に、
懸濁液を0.1 モルＮａＣｌで３回洗浄した。これを遠心
分離にかけ、10分間で沈殿物を2500ｇの沈殿を得た。The suspension was adjusted to pH 7.5 by adding 1 molar KOH. After the pH stabilizes at 7.5,
The suspension was washed 3 times with 0.1 molar NaCl. This was subjected to centrifugation, and 2500 g of a precipitate was obtained in 10 minutes.
【００３７】沈殿物に0.1 モルＮａＣｌを加えて全体を
１リットルとし、２℃で貯蔵した。懸濁液を約10ｇ／リ
ットルに濃縮して、フェリハイドライトが得られた。The precipitate was made up to 1 liter with 0.1M NaCl and stored at 2 ° C. The suspension was concentrated to about 10 g / l to give ferrihydrite.
【００３８】このようにして得られたフェリハイドライ
トを、砒素を含む土壌に添加した。The ferrihydrite thus obtained was added to soil containing arsenic.
【００３９】この結果、シュベルトマナイトの場合と同
様に砒素がフェリハイドライトに収着され、不動態化さ
れて、土壌から除去することができた。As a result, as in the case of schwertmannite, arsenic was sorbed on ferrihydrite, was passivated, and could be removed from the soil.
【００４０】（その他の実施例）尚、上記実施例では、
シュベルトマナイトやフェリハイドライトを用いて砒素
を収着し、不動態化する場合について説明したが、シュ
ベルトマナイトやフェリハイドライトに代えて、たとえ
ばゲータイト、ジャロサイトを用いることも可能であ
る。(Other Embodiments) In the above embodiment,
Although the case where arsenic is sorbed and passivated by using schwertmannite or ferrihydrite has been described, it is possible to use, for example, goethite or jarosite instead of schwertmannite or ferrihydrite.
【００４１】また、上記実施例１，２，５等では、シュ
ベルトマナイトやフェリハイドライトを直接土壌に添加
したが、たとえばインジェクション工法、すなわち筒状
体を土壌に突き刺し、その筒状体を介してシュベルトマ
ナイトを含む液を土中に噴出させるような工法を採用す
ることも可能である。Further, in the above-mentioned Examples 1, 2, 5 and the like, schwertmannite and ferrihydrite were directly added to the soil, but for example, the injection method, that is, the tubular body was pierced into the soil and the tubular body was inserted through the tubular body. It is also possible to employ a method of ejecting a liquid containing schwertmannite into the soil.
【００４２】また、土壌を掘削してプール化した反応池
と称される箇所にシュベルトマナイトを添加することも
可能である。It is also possible to add schwertmannite to a place called a reaction pond where soil is excavated and pooled.
【００４３】さらに、上記実施例では、砒素を含有する
土壌に適用する場合について説明したが、砒素に限らず
重金属を含有する土壌に本発明を適用することも可能で
ある。Further, in the above-mentioned embodiment, the case where the present invention is applied to the soil containing arsenic is explained. However, the present invention can be applied to the soil containing not only arsenic but also heavy metals.
【００４４】この場合でも、重金属をシュベルトマナイ
ト等に収着させ、不動態化させることで、土壌中から重
金属を除去することができる。Even in this case, the heavy metal can be removed from the soil by sorbing the heavy metal on Schwertmannite or the like to passivate it.
【００４５】さらに、シュベルトマナイトやフェリハイ
ドライトを合成する方法も、上記各実施例に限定されな
い。Furthermore, the method of synthesizing Schwertmannite or ferrihydrite is not limited to the above-mentioned embodiments.
【００４６】[0046]
【発明の効果】叙上のように、本発明は、砒素又は重金
属を含む汚染土壌に、化学的に合成されたシュベルトマ
ナイト、ゲータイト、ジャロサイト、フェリハイドライ
トのいずれかの鉄化合物を添加し、汚染土壌中の砒素又
は重金属を前記鉄化合物に収着させ、不動態化させるこ
とにより、汚染土壌を浄化する方法であり、或いは砒素
又は重金属を含む汚染土壌から砒素又は重金属を抽出
し、その抽出液に、シュベルトマナイト、ゲータイト、
ジャロサイト、フェリハイドライトのいずれかの鉄化合
物を合成しうる鉄化合物合成資材を添加して、前記鉄化
合物を合成するとともに、抽出液中の砒素又は重金属を
前記鉄化合物に収着させ、不動態化させることにより、
汚染土壌を浄化する方法であるため、有害物質である砒
素又は重金属を土壌中から除去することができ、土壌汚
染の浄化を図ることができるという効果がある。INDUSTRIAL APPLICABILITY As described above, according to the present invention, a chemically synthesized iron compound such as schwertmannite, goethite, jarosite, or ferrihydrite is added to a contaminated soil containing arsenic or heavy metal. , Sorbing arsenic or heavy metal in contaminated soil to the iron compound, by passivation, is a method of purifying contaminated soil, or extracting arsenic or heavy metal from contaminated soil containing arsenic or heavy metal, In the extract, schwertmannite, goethite,
An iron compound synthesizing material capable of synthesizing an iron compound of either jarosite or ferrihydrite is added to synthesize the iron compound, and arsenic or heavy metal in the extract is sorbed on the iron compound, By activating,
Since it is a method for purifying contaminated soil, there is an effect that arsenic or heavy metal, which is a harmful substance, can be removed from the soil, and soil contamination can be purified.
【００４７】また砒素や重金属の有害物質を土壌中から
除去するだけでなく、シュベルトマナイト等の鉄化合物
で、収着させ、不動態化させることができるので、これ
らの有害物質が周辺部に飛散することもなく、周辺部に
おける環境汚染を生じさせるおそれもないという効果が
ある。Moreover, not only can harmful substances such as arsenic and heavy metals be removed from the soil, but they can also be sorbed and passivated by iron compounds such as schwertmannite, so that these harmful substances can be absorbed in the peripheral area. There is an effect that there is no scattering and there is no fear of causing environmental pollution in the peripheral portion.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０９Ｃ 1/08 Ｂ０９Ｂ 3/00 ＺＡＢ Ｃ０２Ｆ 1/62 (72)発明者 木田 幸男 大阪府八尾市八尾木３−64 (72)発明者 池田 穂高 東京都北区西ケ原３−23−９ (72)発明者 萩原 正人 栃木県足利市葉鹿町130−１ (72)発明者 荒 美紀子 福島県相馬市粟津字粟津25−２ Ｆターム(参考） 4D004 AA41 AB03 AC07 CA13 CA15 CA40 CA47 CB03 CB26 CC03 CC06 CC12 4D017 AA01 BA13 CA04 CB01 DA07 DB01 4D038 AA08 AB63 AB70 AB81 AB86 BA02 BB05 BB06 4D056 AB01 AB08 AC22 BA03 CA06 CA13 CA17 CA39 4G066 AA12B AA27B AA47B AA53B CA46 DA08 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) B09C 1/08 B09B 3/00 ZAB C02F 1/62 (72) Inventor Yukio Kida 3 Yaogi, Yao-shi, Osaka −64 (72) Inventor Hotaka Ikeda 3-23-9 Nishigahara, Kita-ku, Tokyo (72) Masato Hagiwara 130-1 Haka-cho, Ashikaga City, Tochigi Prefecture (72) Mikiko Ara 25 Awazu Awazu, Awazu, Soma City, Fukushima Prefecture -2F term (reference) 4D004 AA41 AB03 AC07 CA13 CA15 CA40 CA47 CB03 CB26 CC03 CC06 CC12 4D017 AA01 BA13 CA04 CB01 DA07 DB01 4D038 AA08 AB63 AB70 AB81 AB86 BA02 BB05 BB06 4D056 AB01 AB08 AC22 BA03 A06 CA06 A06 CA13 CA06 CA13 CA06 CA13 CA06 CA13 CA06 CA13 CA06 CA13 CA06 CA13 CA06 CA13 CA46 DA08
Claims (2)
的に合成されたシュベルトマナイト、ゲータイト、ジャ
ロサイト、フェリハイドライトのいずれかの鉄化合物を
添加し、汚染土壌中の砒素又は重金属を前記鉄化合物に
収着させ、不動態化させることにより、汚染土壌を浄化
することを特徴とする汚染土壌の浄化方法。1. A chemically synthesized iron compound of any one of schwertmannite, goethite, jarosite, and ferrihydrite is added to a contaminated soil containing arsenic or heavy metal to remove arsenic or heavy metal in the contaminated soil. A method for purifying contaminated soil, which comprises purifying contaminated soil by sorbing and passivating the iron compound.
又は重金属を抽出し、その抽出液に、シュベルトマナイ
ト、ゲータイト、ジャロサイト、フェリハイドライトの
いずれかの鉄化合物を合成しうる鉄化合物合成資材を添
加して、前記鉄化合物を合成するとともに、抽出液中の
砒素又は重金属を前記鉄化合物に収着させ、不動態化さ
せることにより、汚染土壌を浄化することを特徴とする
汚染土壌の浄化方法。2. An iron compound synthesis capable of synthesizing an iron compound of schwertmannite, goethite, jarosite, or ferrihydrite in the extract by extracting arsenic or heavy metal from a contaminated soil containing arsenic or heavy metal. A material is added to synthesize the iron compound, and arsenic or heavy metal in the extract is sorbed to the iron compound and passivated to purify the contaminated soil. Purification method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001309944A JP2003112162A (en) | 2001-10-05 | 2001-10-05 | Polluted soil cleaning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001309944A JP2003112162A (en) | 2001-10-05 | 2001-10-05 | Polluted soil cleaning method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003112162A true JP2003112162A (en) | 2003-04-15 |
Family
ID=19129010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001309944A Pending JP2003112162A (en) | 2001-10-05 | 2001-10-05 | Polluted soil cleaning method |
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| Country | Link |
|---|---|
| JP (1) | JP2003112162A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100355668C (en) * | 2003-06-05 | 2007-12-19 | 新日铁化学株式会社 | Treating material for polluted water, method for production thereof and use thereof |
| WO2008023853A1 (en) | 2006-08-25 | 2008-02-28 | National University Corporation Nagoya University | Magnetic chemical absorber, process for producing the same, method of regenerating the same, and method of treating waste liquid |
| AU2004245399B2 (en) * | 2003-06-05 | 2009-09-03 | Nippon Steel Chemical Co., Ltd. | Treating material for polluted water, method for production thereof and use thereof |
| JP2010052975A (en) * | 2008-08-27 | 2010-03-11 | Nagoya Univ | Method for producing shwertmannite |
| US8158006B2 (en) * | 2004-07-23 | 2012-04-17 | Mitsui Mining & Smelting Co., Ltd. | Method for removing fluorine using a fluorine adsorbent/desorbent |
| JP2013255903A (en) * | 2012-06-14 | 2013-12-26 | Nippon Solid Co Ltd | Environment improvement material |
| JP2014147912A (en) * | 2013-02-04 | 2014-08-21 | Nippon Steel & Sumitomo Metal | Method for insolubilizing poisonous metal in contaminated soil |
| JP2015021802A (en) * | 2013-07-18 | 2015-02-02 | 國分農場有限会社 | Method for processing radioactive cesium |
| CN107880923A (en) * | 2016-09-29 | 2018-04-06 | 巴西石油公司 | Method for removing arsenic removal and sulphur simultaneously from hydrocarbon stream |
| CN110125152A (en) * | 2018-02-08 | 2019-08-16 | 中环循(北京)环境技术中心 | A kind of systems approach in quick repairing heavy metal pollution farmland |
| CN110227229A (en) * | 2019-07-24 | 2019-09-13 | 湖南科臣环境科技有限公司 | A kind of dearsenification slag stable composition chemical drug agent and its application |
| US20220355353A1 (en) * | 2020-10-09 | 2022-11-10 | United States Government, as represented by the Administrator of the U.S. EPA | Method for sequestering ions in an environmental matrix |
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2001
- 2001-10-05 JP JP2001309944A patent/JP2003112162A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100355668C (en) * | 2003-06-05 | 2007-12-19 | 新日铁化学株式会社 | Treating material for polluted water, method for production thereof and use thereof |
| AU2004245399B2 (en) * | 2003-06-05 | 2009-09-03 | Nippon Steel Chemical Co., Ltd. | Treating material for polluted water, method for production thereof and use thereof |
| US8158006B2 (en) * | 2004-07-23 | 2012-04-17 | Mitsui Mining & Smelting Co., Ltd. | Method for removing fluorine using a fluorine adsorbent/desorbent |
| WO2008023853A1 (en) | 2006-08-25 | 2008-02-28 | National University Corporation Nagoya University | Magnetic chemical absorber, process for producing the same, method of regenerating the same, and method of treating waste liquid |
| KR101015928B1 (en) * | 2006-08-25 | 2011-02-23 | 고쿠리츠 다이가쿠 호우징 나고야 다이가쿠 | Magnetic chemical absorbent, production process for the same and recycling method for the same, as well as waste-liquid treating method |
| JP2010052975A (en) * | 2008-08-27 | 2010-03-11 | Nagoya Univ | Method for producing shwertmannite |
| JP2013255903A (en) * | 2012-06-14 | 2013-12-26 | Nippon Solid Co Ltd | Environment improvement material |
| JP2014147912A (en) * | 2013-02-04 | 2014-08-21 | Nippon Steel & Sumitomo Metal | Method for insolubilizing poisonous metal in contaminated soil |
| JP2015021802A (en) * | 2013-07-18 | 2015-02-02 | 國分農場有限会社 | Method for processing radioactive cesium |
| CN107880923A (en) * | 2016-09-29 | 2018-04-06 | 巴西石油公司 | Method for removing arsenic removal and sulphur simultaneously from hydrocarbon stream |
| CN110125152A (en) * | 2018-02-08 | 2019-08-16 | 中环循(北京)环境技术中心 | A kind of systems approach in quick repairing heavy metal pollution farmland |
| CN110227229A (en) * | 2019-07-24 | 2019-09-13 | 湖南科臣环境科技有限公司 | A kind of dearsenification slag stable composition chemical drug agent and its application |
| US20220355353A1 (en) * | 2020-10-09 | 2022-11-10 | United States Government, as represented by the Administrator of the U.S. EPA | Method for sequestering ions in an environmental matrix |
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