JP2004025070A - Cleaning method of polluted soil - Google Patents
Cleaning method of polluted soil Download PDFInfo
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- JP2004025070A JP2004025070A JP2002186987A JP2002186987A JP2004025070A JP 2004025070 A JP2004025070 A JP 2004025070A JP 2002186987 A JP2002186987 A JP 2002186987A JP 2002186987 A JP2002186987 A JP 2002186987A JP 2004025070 A JP2004025070 A JP 2004025070A
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- aqueous solution
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- soil
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- 239000002689 soil Substances 0.000 title claims abstract description 61
- 238000004140 cleaning Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000007864 aqueous solution Substances 0.000 claims abstract description 37
- 238000011084 recovery Methods 0.000 claims abstract description 34
- 229920000858 Cyclodextrin Polymers 0.000 claims abstract description 32
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 23
- 239000007924 injection Substances 0.000 claims abstract description 23
- 210000003462 vein Anatomy 0.000 claims abstract description 13
- 239000003673 groundwater Substances 0.000 claims description 32
- 239000000356 contaminant Substances 0.000 claims description 27
- 244000005700 microbiome Species 0.000 claims description 11
- 235000015097 nutrients Nutrition 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims 1
- 238000005086 pumping Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 6
- 239000000243 solution Substances 0.000 abstract description 6
- 230000002411 adverse Effects 0.000 abstract description 4
- 238000005406 washing Methods 0.000 abstract description 4
- 238000009412 basement excavation Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 239000003929 acidic solution Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
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- Treatment Of Biological Wastes In General (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】
【発明の属する技術分野】
本発明は、汚染土壌の洗浄方法に関し、特に難水溶性の汚染物質によって汚染された汚染土壌の洗浄方法に関するものである。
【０００２】
【従来の技術】
重金属や油分に汚染された土壌を洗浄する方法として、従来より各種の試みがなされている。例えば、特許第２７００７６２号には、シクロデキストリンが包接複合体形成能を持ち、土壌中の有機汚染物質のほとんどと複合体を形成できることを利用して、シクロデキストリン水溶液と汚染土壌を混合することにより有機汚染物質を抽出する汚染土壌の洗浄方法が提案されている。
【０００３】
また、特願平１１−９０４１０号公報には、水をはじめ、酸性溶液、アルカリ性溶液、界面活性剤、有機溶媒等の溶液を地下水位よりも上方の汚染土壌中に注入して土壌中の汚染物質を洗い流し、汚染物質を含んだ溶液を回収することにより汚染物質を原位置で浄化する汚染土壌の洗浄方法が提案されている。
【０００４】
【発明が解決しようとする課題】
しかしながら、特許第２７００７６２号に記載の方法では、汚染土壌を掘削して浄化するため掘削費がかかり、さらに掘削土壌の処理スペースが必要となる。
【０００５】
また、特願平１１−９０４１０号公報に記載の方法では、地下水位よりも上方にある汚染土壌中の洗浄は行えるものの、雨水などにより汚染物質が地下水位よりも下方の地下水脈に流れ込んだ場合には、地下水脈中の汚染物質の除去が困難となり、狭い範囲の土壌洗浄しか行えないという問題がある。また、溶媒が水である場合には地下水中の難水溶性物質の抽出は難しく、難水溶性物質を抽出するために溶媒として界面活性剤や有機溶媒等を用いると、注入した薬剤が環境中に残存して生態系に悪影響を与え、二次汚染に繋がる恐れがある。
【０００６】
本発明は上記した課題を解決するものであり、掘削処理が不要で、生態系に悪影響を与えることなく広範囲の土壌を洗浄でき、土壌中の汚染物質、特に難水溶性の汚染物質を良好に除去できる汚染土壌の洗浄方法を提供するものである。
【０００７】
【課題を解決するための手段】
上記課題を解決するために請求項１に係る本発明の汚染土壌の洗浄方法は、対象汚染地域に地下水位よりも下方に達する複数の井戸を掘り、そのうちの少なくとも一つを注入井とし残りを回収井として前記注入井にシクロデキストリンを含む水溶液を供給し、注入井に蓄えた水溶液を注入井の周囲の汚染土壌中に染み込ませて地下水脈の流れを利用して回収井まで通液することで汚染土壌中の汚染物質を抽出し、回収井から汚染物質を含む水溶液をくみ上げて水処理するものである。
【０００８】
この構成によると、有機汚染物質と複合体を形成可能な包接複合体形成能と生分解性とを有するシクロデキストリンを用いるとともに、地下水脈の流れを利用して汚染土壌の洗浄を行うことで、汚染土壌中に難水溶性物質が含まれていても生態系に悪影響を与えることなく容易に抽出でき、広範囲の汚染土壌を洗浄できる。
【０００９】
請求項２に係る本発明の汚染土壌の洗浄方法は、対象汚染地域に地下水位よりも下方に達する井戸を回収井として堀り、対象汚染地域の地下水位よりも上方域にシクロデキストリンを含む水溶液を散水もしくは注入し、汚染土壌中を地下水位まで通過する間に抽出した汚染物質を含む水溶液を地下水脈の流れを利用して回収井まで通液し、回収井から汚染物質を含む水溶液をくみ上げて水処理するものである。
【００１０】
この構成により、水に難溶性の汚染物質は雨などに溶解して地下水にまで染み出ることは少ないので、地下水位より上方に溜まっており、このような汚染に対しても対象汚染地域の汚染土壌を掘削して回収することなく抽出によって浄化が可能となる。
【００１１】
請求項３に係る本発明の汚染土壌の洗浄方法は、水処理した水溶液を再び汚染土壌中に循環させるものである。
請求項４に係る本発明の汚染土壌の洗浄方法は、シクロデキストリンを含む水溶液に栄養源または汚染物質分解微生物の少なくとも一方を添加するものである。
【００１２】
この構成によると、シクロデキストリンによる汚染物質の取り込みが活発となり、またシクロデキストリンによって取り込まれた汚染物質はシクロデキストリンを炭素源として活性が高まった汚染物質分解微生物によって分解が促進されるため、バイオレメディエーション（バイオ環境修復）の促進が図れる。
【００１３】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。図１，図２において、対象汚染地域１に、地下水位２よりも下方に達する複数の井戸を掘り、矢印Ａで示す地下水脈の流れ方向の上手側の井戸を注入井３、下手側の井戸を回収井４とする。
【００１４】
汚染土壌の洗浄には、シクロデキストリンを水に溶解した水溶液（以下、「シクロデキストリン水溶液」と称す。）を用いる。シクロデキストリンは包接複合体形成能を持つことから土壌中の有機汚染物質のほとんどと複合体を形成でき、土壌中の難水溶性物質についても好適に抽出できる。さらに、シクロデキストリンは糖の一種であり、生物によって分解される物質、すなわち生分解性を有することから、自然環境中に残存しても二次汚染の恐れがなくなる。また、自然環境中に残存した場合には汚染土壌周辺の微生物の働きが活発になり、バイオレメディエーションの促進が図れる。
【００１５】
このシクロデキストリン水溶液を洗浄液供給系５を通して注入井３に供給する。注入井３に蓄えられた水溶液は注入井３の周囲の汚染土壌中に染み込み、矢印Ａで示す地下水脈の流れを利用して回収井４まで通液する。回収井４に達した水溶液は、汚染土壌を通過することで抽出した汚染物質を含む。この回収井４に滞留するシクロデキストリン水溶液をポンプ６を有する洗浄液回収系７によって回収井４から地上にくみ上げ、水処理施設８で水処理する。
【００１６】
水処理施設８では、シクロデキストリンによって取り込まれた汚染物質が汚染物質分解微生物によって分解されるが、この汚染物質分解微生物はシクロデキストリンを炭素源として活性が高まるため、汚染物質の分解の促進が図れる。
【００１７】
水処理した処理水は洗浄液供給系５に返送し、注入井３へ供給する水として再利用する。
このように、シクロデキストリン水溶液を注入井３に蓄えてその周囲の土壌に染み込ませ、地下水脈の流れを利用して回収井４に送り、汚染物質を含む水溶液を回収井４からくみ上げて水処理施設８に送って水処理し、処理水を洗浄液供給系５へ返送するよう循環路を形成することで、シクロデキストリン水溶液を繰り返し利用できる。
【００１８】
また、シクロデキストリン水溶液に栄養源を添加すると、シクロデキストリン水溶液を注入井３から回収井４へ向かって通液する際に土壌中の微生物の活性が高まり、より一層良好に土壌洗浄を行える。
【００１９】
また、シクロデキストリン水溶液には、上記栄養源に加えて、あるいは単独で処理対象汚染物質の分解微生物を添加しても良い。処理対象汚染物質の分解微生物を添加すると、微生物活性が高まり土壌中での汚染物質の分解性が増大する。
【００２０】
なお、上記説明では、注入井３と回収井４を同数設けた例を挙げて説明したが、本発明はこれに限定されるものではなく、複数設けた井戸のうち少なくとも一つを注入井３とし、残りを回収井４としたものであれば良い。
【００２１】
また、上記説明では、水処理施設８で水処理した処理水を洗浄液供給系５へ返送するよう構成したが、処理水を系外へ排出するよう構成してもよい。
図３は本発明の他の実施の形態を示すものである。図３において、シクロデキストリン水溶液は洗浄液供給系５を通して対象汚染地域の地下水位よりも上方域に散水もしくは注入し、汚染土壌中を地下水位まで通過する間に抽出した汚染物質を含む水溶液を矢印Ａで示す地下水脈の流れを利用して回収井４まで通液する。この回収井４に滞留するシクロデキストリン水溶液をポンプ６を有する洗浄液回収系７によって回収井４から地上にくみ上げ、水処理施設８で水処理する。
【００２２】
この構成において、水に難溶性の汚染物質は雨などに溶解して地下水にまで染み出ることは少ないので、地下水位より上方に溜まっており、このような汚染に対しても対象汚染地域の汚染土壌を掘削して回収することなく抽出によって浄化が可能となる。
【００２３】
【発明の効果】
以上のように本発明によれば、汚染土壌を洗浄するに際し、シクロデキストリン水溶液を注入井に供給し、注入井に蓄えた水溶液を周囲の汚染土壌中に染み込ませて地下水脈の流れを利用して回収井まで通液することで汚染土壌中の汚染物質を抽出し、回収井から汚染物質を含む水溶液をくみ上げて水処理することで、広範囲の汚染土壌の洗浄を容易に行うことができる。また、シクロデキストリンによって取り込まれた汚染物質はシクロデキストリンを炭素源として活性が高まった汚染物質分解微生物によって分解が促進されることから、バイオレメディエーションの促進が図れる。さらに、シクロデキストリンは生分解性を有するため、自然環境中に残存しても二次汚染の恐れがない。
【図面の簡単な説明】
【図１】本発明の実施の形態における汚染土壌の洗浄方法を説明する断面模式図である。
【図２】同実施の形態における汚染土壌の洗浄方法を説明する平面模式図である。
【図３】本発明の他の実施の形態における汚染土壌の洗浄方法を説明する断面模式図である。
【符号の説明】
１ 汚染対象地域
２ 地下水位
３ 注入井
４ 回収井
５ 洗浄液供給系
６ ポンプ
７ 洗浄液回収系
８ 水処理施設
Ａ 地下水脈の流れ方向[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for cleaning contaminated soil, and more particularly to a method for cleaning contaminated soil contaminated with poorly water-soluble contaminants.
[0002]
[Prior art]
Conventionally, various attempts have been made as a method of cleaning soil contaminated with heavy metals and oil. For example, Japanese Patent No. 270762 discloses that cyclodextrin has an ability to form an inclusion complex and can form a complex with most of organic pollutants in soil, so that an aqueous solution of cyclodextrin is mixed with contaminated soil. A method for cleaning contaminated soil that extracts organic contaminants has been proposed.
[0003]
Further, Japanese Patent Application No. 11-90410 discloses that a solution such as water, an acidic solution, an alkaline solution, a surfactant, and an organic solvent is injected into contaminated soil above the groundwater level to contaminate the soil. A method of cleaning contaminated soil has been proposed in which the contaminants are purified in situ by washing away the substances and collecting the solution containing the contaminants.
[0004]
[Problems to be solved by the invention]
However, in the method described in Japanese Patent No. 2700762, excavation cost is required for excavating and purifying contaminated soil, and a space for treating excavated soil is required.
[0005]
Further, in the method described in Japanese Patent Application No. 11-90410, it is possible to wash contaminated soil above the groundwater level, but when contaminants flow into the groundwater vein below the groundwater level due to rainwater or the like. Has a problem that it is difficult to remove contaminants from groundwater veins, and only a small range of soil can be washed. In addition, when the solvent is water, it is difficult to extract a poorly water-soluble substance from groundwater. If a surfactant or an organic solvent is used as a solvent to extract the poorly water-soluble substance, the injected drug may not be used in the environment. And may adversely affect ecosystems and lead to secondary pollution.
[0006]
The present invention has been made to solve the above-described problems, and does not require excavation treatment, can wash a wide range of soil without adversely affecting the ecosystem, and can effectively remove contaminants in soil, particularly poorly water-soluble contaminants. It is intended to provide a method for cleaning contaminated soil that can be removed.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the method for cleaning contaminated soil according to the present invention according to
[0008]
According to this configuration, by using a cyclodextrin having an inclusion complex forming ability and biodegradability capable of forming a complex with an organic pollutant, the contaminated soil is washed by using a flow of a groundwater vein. Even if a poorly water-soluble substance is contained in contaminated soil, it can be easily extracted without adversely affecting the ecosystem, and a wide range of contaminated soil can be washed.
[0009]
The method for cleaning contaminated soil according to the present invention according to
[0010]
With this configuration, pollutants that are hardly soluble in water are less likely to dissolve into rainwater and seep into the groundwater, so they accumulate above the groundwater level. Extraction allows for purification without excavating and collecting soil.
[0011]
According to a third aspect of the present invention, there is provided a method for cleaning contaminated soil, wherein the water-treated aqueous solution is circulated again into the contaminated soil.
According to a fourth aspect of the present invention, there is provided a method for cleaning contaminated soil, wherein at least one of a nutrient source and a pollutant-degrading microorganism is added to an aqueous solution containing cyclodextrin.
[0012]
According to this configuration, the uptake of contaminants by cyclodextrin becomes active, and the contaminants taken in by cyclodextrin are promoted to be decomposed by contaminant-degrading microorganisms whose activity is increased using cyclodextrin as a carbon source, so that bioremediation is achieved. (Bio-environmental restoration) can be promoted.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2, a plurality of wells reaching below the
[0014]
An aqueous solution in which cyclodextrin is dissolved in water (hereinafter, referred to as “cyclodextrin aqueous solution”) is used for washing the contaminated soil. Since cyclodextrin has the ability to form an inclusion complex, it can form a complex with most of organic contaminants in the soil, and can also suitably extract poorly water-soluble substances in the soil. Furthermore, cyclodextrin is a kind of sugar, and is a substance that is degraded by living organisms, that is, it has biodegradability. Therefore, even if it remains in the natural environment, there is no possibility of secondary contamination. In addition, when the microorganisms remain in the natural environment, the action of microorganisms around the contaminated soil becomes active, thereby promoting bioremediation.
[0015]
The aqueous solution of cyclodextrin is supplied to the injection well 3 through the cleaning liquid supply system 5. The aqueous solution stored in the injection well 3 permeates into the contaminated soil around the injection well 3 and flows to the recovery well 4 using the flow of the groundwater vein indicated by the arrow A. The aqueous solution that has reached the recovery well 4 contains contaminants extracted by passing through the contaminated soil. The aqueous solution of cyclodextrin staying in the recovery well 4 is pumped to the ground from the recovery well 4 by a cleaning liquid recovery system 7 having a
[0016]
In the water treatment facility 8, the contaminants taken in by the cyclodextrin are decomposed by the contaminant-decomposing microorganisms. The activity of the contaminant-decomposing microorganisms is increased by using the cyclodextrin as a carbon source, so that the decomposition of the contaminants can be promoted. .
[0017]
The treated water is returned to the cleaning liquid supply system 5 and reused as water to be supplied to the injection well 3.
As described above, the cyclodextrin aqueous solution is stored in the injection well 3, soaked into the surrounding soil, sent to the recovery well 4 using the flow of the groundwater vein, and the aqueous solution containing pollutants is pumped up from the recovery well 4 for water treatment. The cyclodextrin aqueous solution can be repeatedly used by forming a circulation path for sending the treated water to the facility 8 for water treatment and returning the treated water to the cleaning liquid supply system 5.
[0018]
In addition, when a nutrient is added to the aqueous solution of cyclodextrin, the activity of microorganisms in the soil is increased when the aqueous solution of cyclodextrin is passed from the injection well 3 to the recovery well 4, so that soil washing can be performed more favorably.
[0019]
Further, in the aqueous cyclodextrin solution, a microorganism that decomposes the contaminant to be treated may be added alone or in addition to the above-mentioned nutrient source. The addition of microorganisms that decompose the pollutant to be treated increases the microbial activity and increases the degradability of the pollutant in soil.
[0020]
In the above description, an example was described in which the same number of
[0021]
Further, in the above description, the treated water subjected to the water treatment in the water treatment facility 8 is configured to be returned to the cleaning liquid supply system 5, but the treated water may be configured to be discharged out of the system.
FIG. 3 shows another embodiment of the present invention. In FIG. 3, the aqueous solution of cyclodextrin is sprinkled or injected through the cleaning liquid supply system 5 into an area above the groundwater level of the target contaminated area, and the aqueous solution containing the contaminants extracted while passing through the contaminated soil to the groundwater level is indicated by an arrow A. Using the flow of the groundwater vein indicated by, the liquid is passed to the recovery well 4. The aqueous solution of cyclodextrin staying in the recovery well 4 is pumped to the ground from the recovery well 4 by a cleaning liquid recovery system 7 having a
[0022]
In this configuration, pollutants that are hardly soluble in water are less likely to dissolve into rainwater and seep into the groundwater, so they accumulate above the groundwater level. Extraction allows for purification without excavating and collecting soil.
[0023]
【The invention's effect】
As described above, according to the present invention, when cleaning contaminated soil, an aqueous solution of cyclodextrin is supplied to the injection well, and the aqueous solution stored in the injection well is impregnated into the surrounding contaminated soil to utilize the flow of the groundwater vein. The contaminants in the contaminated soil are extracted by passing the solution to the recovery well, and an aqueous solution containing the contaminants is extracted from the recovery well and subjected to water treatment, whereby a wide range of contaminated soil can be easily washed. In addition, the contaminants taken in by the cyclodextrin are promoted to be decomposed by the contaminant-decomposing microorganisms whose activity has been increased by using the cyclodextrin as a carbon source, so that bioremediation can be promoted. Furthermore, since cyclodextrin is biodegradable, there is no risk of secondary contamination even if it remains in the natural environment.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view illustrating a method for cleaning contaminated soil according to an embodiment of the present invention.
FIG. 2 is a schematic plan view illustrating a method for cleaning contaminated soil according to the embodiment.
FIG. 3 is a schematic sectional view illustrating a method for cleaning contaminated soil according to another embodiment of the present invention.
[Explanation of symbols]
1 Contaminated
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002186987A JP2004025070A (en) | 2002-06-27 | 2002-06-27 | Cleaning method of polluted soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002186987A JP2004025070A (en) | 2002-06-27 | 2002-06-27 | Cleaning method of polluted soil |
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| Publication Number | Publication Date |
|---|---|
| JP2004025070A true JP2004025070A (en) | 2004-01-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002186987A Withdrawn JP2004025070A (en) | 2002-06-27 | 2002-06-27 | Cleaning method of polluted soil |
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| JP (1) | JP2004025070A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007514533A (en) * | 2003-12-19 | 2007-06-07 | テレコ | How to remove contaminants from contaminated groundwater |
| JP2007253075A (en) * | 2006-03-23 | 2007-10-04 | Nippon Oil Corp | Soil purifying method |
| CN103472194A (en) * | 2013-10-08 | 2013-12-25 | 南京信息工程大学 | Method for measuring and calculating threshold concentration of ecological toxic effect of environmental pollutants |
| CN103613236A (en) * | 2013-12-04 | 2014-03-05 | 中国环境科学研究院 | Meandering steam type groundwater pollution repairing device |
| CN104174643A (en) * | 2014-08-08 | 2014-12-03 | 北京建工环境修复股份有限公司 | In-situ restoration device and in-situ restoration method of organic polluted soil and underground water |
| CN105363775A (en) * | 2015-12-09 | 2016-03-02 | 辽宁石油化工大学 | Application for repairing lead-polluted soil by chemical-enhanced flower plants |
| CN112872022A (en) * | 2021-03-15 | 2021-06-01 | 中国石油化工股份有限公司 | Method for in-situ remediation of petroleum organic polluted site |
-
2002
- 2002-06-27 JP JP2002186987A patent/JP2004025070A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007514533A (en) * | 2003-12-19 | 2007-06-07 | テレコ | How to remove contaminants from contaminated groundwater |
| JP2007253075A (en) * | 2006-03-23 | 2007-10-04 | Nippon Oil Corp | Soil purifying method |
| CN103472194A (en) * | 2013-10-08 | 2013-12-25 | 南京信息工程大学 | Method for measuring and calculating threshold concentration of ecological toxic effect of environmental pollutants |
| CN103613236A (en) * | 2013-12-04 | 2014-03-05 | 中国环境科学研究院 | Meandering steam type groundwater pollution repairing device |
| CN104174643A (en) * | 2014-08-08 | 2014-12-03 | 北京建工环境修复股份有限公司 | In-situ restoration device and in-situ restoration method of organic polluted soil and underground water |
| CN105363775A (en) * | 2015-12-09 | 2016-03-02 | 辽宁石油化工大学 | Application for repairing lead-polluted soil by chemical-enhanced flower plants |
| CN112872022A (en) * | 2021-03-15 | 2021-06-01 | 中国石油化工股份有限公司 | Method for in-situ remediation of petroleum organic polluted site |
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