JP2007275710A - Method of cleaning soil contaminated by volatile organic chlorine compound - Google Patents

Method of cleaning soil contaminated by volatile organic chlorine compound Download PDF

Info

Publication number
JP2007275710A
JP2007275710A JP2006102460A JP2006102460A JP2007275710A JP 2007275710 A JP2007275710 A JP 2007275710A JP 2006102460 A JP2006102460 A JP 2006102460A JP 2006102460 A JP2006102460 A JP 2006102460A JP 2007275710 A JP2007275710 A JP 2007275710A
Authority
JP
Japan
Prior art keywords
purification
carbon dioxide
point
organic acid
contaminated
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
Application number
JP2006102460A
Other languages
Japanese (ja)
Inventor
Hiroshi Hirata
博史 平田
Yoshitaka Ito
善孝 伊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2006102460A priority Critical patent/JP2007275710A/en
Publication of JP2007275710A publication Critical patent/JP2007275710A/en
Pending legal-status Critical Current

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of cleaning soil contaminated by volatile organic chlorine compound which uses a ground water stream and is convenient and efficient. <P>SOLUTION: An organic acid and/or carbon dioxide supply point reaching the lower part of a permeable layer is disposed on the upstream side of the ground water stream for a contaminated region, a cleaning point reaching the lower part of the permeable layer is disposed on the downstream side thereof, thereby, organic acid and/or carbon dioxide is caused to reach the contaminated region from the organic acid and/or carbon dioxide supply point by means of the ground water stream to separate the volatile organic chlorine compound from the contaminated region and the volatile organic chlorine compound separated from the contaminated region is caused to reach the cleaning point and is decomposed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、揮発性有機塩素化合物で汚染された土壌の浄化方法に関する。   The present invention relates to a method for purifying soil contaminated with volatile organochlorine compounds.

従来から知られているテトラクロロエチレンなどの揮発性有機塩素化合物で汚染された土壌の浄化方法としては、例えば、特許文献１に記載されているような、汚染された土壌の汚染範囲の地中に、土壌を掘進しながら浄化剤を混合して混合壁を形成するようにして行う方法がある。
特開２００１−３２１７６２号公報 As a conventional purification method for soil contaminated with volatile organic chlorine compounds such as tetrachlorethylene, as described in Patent Document 1, for example, in the ground of the contaminated range of contaminated soil, There is a method in which a purifying agent is mixed to form a mixing wall while excavating the soil.
JP 2001-321762 A

しかしながら、特許文献１に記載の浄化方法は、浄化に時間がかかるといった問題や混合壁を多数形成しなければ浄化できないといった問題がある。
そこで本発明は、簡易かつ効率的な揮発性有機塩素化合物で汚染された土壌の浄化方法を提供することを目的とする。 However, the purification method described in Patent Document 1 has a problem that it takes time to purify, and a problem that purification cannot be performed unless a large number of mixing walls are formed.
Then, an object of this invention is to provide the purification method of the soil contaminated with the volatile organochlorine compound simple and efficient.

上記の点に鑑みてなされた本発明は、請求項１記載の通り、揮発性有機塩素化合物で汚染された土壌の浄化方法であって、汚染領域の地下水流の上流側に透水層下部に至るまでの有機酸および／または二酸化炭素供給ポイントを設け、下流側に透水層下部に至るまでの浄化ポイントを設け、地下水流により、有機酸および／または二酸化炭素供給ポイントから有機酸および／または二酸化炭素を汚染領域に到達させて揮発性有機塩素化合物を汚染領域から遊離させ、汚染領域から遊離した揮発性有機塩素化合物を浄化ポイントに到達させて分解することを特徴とする。
また、請求項２記載の浄化方法は、請求項１記載の洗浄方法において、有機酸がクエン酸および／またはリンゴ酸であることを特徴とする。
また、請求項３記載の浄化方法は、請求項１記載の浄化方法において、二酸化炭素を含む気体を少なくとも０．１ＭＰａ以上の圧力をかけて供給することを特徴とする。
また、請求項４記載の浄化方法は、請求項３記載の浄化方法において、二酸化炭素を含む気体が排気ガスであることを特徴とする。
また、請求項５記載の浄化方法は、請求項１乃至４のいずれかに記載の浄化方法において、浄化ポイントに浄化剤として鉄、マグネシウム、アルミニウム、亜鉛、これらの金属の少なくとも１つを含む合金から選ばれる少なくとも１つの粉末を配置することを特徴とする。
また、請求項６記載の浄化方法は、請求項５記載の浄化方法において、浄化ポイントにさらに活性炭を配置することを特徴とする。
また、請求項７記載の浄化方法は、請求項５記載の浄化方法において、浄化ポイントに砂礫を混合することを特徴とする。 This invention made | formed in view of said point is a purification method of the soil contaminated with the volatile organochlorine compound as described in Claim 1, Comprising: It reaches the lower part of a permeable layer in the upstream of the groundwater flow of a contaminated area | region. An organic acid and / or carbon dioxide supply point is provided, a purification point is provided downstream to the bottom of the permeable layer, and an organic acid and / or carbon dioxide is supplied from the organic acid and / or carbon dioxide supply point by a groundwater flow. The volatile organic chlorine compound is released from the contaminated area by reaching the contaminated area, and the volatile organic chlorine compound released from the contaminated area reaches the purification point for decomposition.
The purification method according to claim 2 is characterized in that, in the cleaning method according to claim 1, the organic acid is citric acid and / or malic acid.
A purification method according to claim 3 is the purification method according to claim 1, wherein a gas containing carbon dioxide is supplied under a pressure of at least 0.1 MPa.
The purification method according to claim 4 is the purification method according to claim 3, wherein the gas containing carbon dioxide is exhaust gas.
The purification method according to claim 5 is the purification method according to any one of claims 1 to 4, wherein the purification point includes iron, magnesium, aluminum, zinc, and an alloy containing at least one of these metals as a purification agent. It is characterized by disposing at least one powder selected from.
The purification method according to claim 6 is characterized in that in the purification method according to claim 5, activated carbon is further arranged at the purification point.
The purification method according to claim 7 is characterized in that in the purification method according to claim 5, gravel is mixed at the purification point.

本発明によれば、地下水流を利用した簡易かつ効率的な揮発性有機塩素化合物で汚染された土壌の浄化方法が提供される。   ADVANTAGE OF THE INVENTION According to this invention, the simple and efficient purification method of the soil contaminated with the volatile organochlorine compound using a groundwater flow is provided.

本発明は、揮発性有機塩素化合物で汚染された土壌の浄化方法であって、汚染領域の地下水流の上流側に透水層下部に至るまでの有機酸および／または二酸化炭素供給ポイントを設け、下流側に透水層下部に至るまでの浄化ポイントを設け、地下水流により、有機酸および／または二酸化炭素供給ポイントから有機酸および／または二酸化炭素を汚染領域に到達させて揮発性有機塩素化合物を汚染領域から遊離させ、汚染領域から遊離した揮発性有機塩素化合物を浄化ポイントに到達させて分解することを特徴とするものである。   The present invention is a method for remediating soil contaminated with volatile organochlorine compounds, comprising an organic acid and / or carbon dioxide supply point up to the bottom of the permeable layer on the upstream side of the groundwater flow in the contaminated area, and downstream A purification point extending to the bottom of the permeable layer is provided on the side, and the organic acid and / or carbon dioxide reaches the contaminated area from the organic acid and / or carbon dioxide supply point by the groundwater flow, and the volatile organochlorine compound is contaminated. The volatile organochlorine compound released from the contaminated area reaches the purification point and is decomposed.

以下、本発明の揮発性有機塩素化合物で汚染された土壌の浄化方法を、図１を参照しながら説明する。   Hereinafter, the purification method of soil contaminated with the volatile organic chlorine compound of the present invention will be described with reference to FIG.

まず、酸化マグネシウムや酸化カルシウムなどの砂利の成分と化学反応する有機酸や二酸化炭素を、汚染領域の地下水流の上流側に設けた供給ポイントから地下水流を利用して汚染領域に到達させることで揮発性有機塩素化合物が付着している砂利と接触させる。すると、砂利の成分が有機酸や二酸化炭素と化学反応することで砂利が溶解するなどし、砂利に付着している揮発性有機塩素化合物が砂利から剥離乃至溶出して汚染領域から遊離する。酸化マグネシウムや酸化カルシウムと有機酸や二酸化炭素との化学反応は次の反応式で表すことができる。ＭＯ＋２ＲＣＯＯＨ→Ｍ2+＋２ＲＣＯＯ-＋Ｈ2Ｏ，ＭＯ＋ＣＯ2→ＭＣＯ3（ＭはＭｇまたはＣａ，Ｒはアルキル基）。次に、汚染領域から遊離した揮発性有機塩素化合物を地下水流を利用して汚染領域の地下水流の下流側に設けた浄化ポイントに到達させて分解する。有機酸および／または二酸化炭素供給ポイントと浄化ポイントを透水層下部に至るまで設けるのは、通常、揮発性有機塩素化合物は難透水層の上の地下水が通る透水層に蓄積されるからである。なお、図１に示すように、浄化ポイントは難透水層にまで到達するように設け、揮発性有機塩素化合物を含む地下水を浄化ポイントで確実に捕捉し、地下水に含まれる揮発性有機塩素化合物を確実に分解できるようにすることが望ましい。 First, organic acids and carbon dioxide that chemically react with gravel components such as magnesium oxide and calcium oxide are made to reach the contaminated area using the groundwater flow from the supply point provided upstream of the groundwater flow in the contaminated area. Contact with gravel with volatile organochlorine compounds attached. Then, the gravel component dissolves due to a chemical reaction of the gravel component with organic acid or carbon dioxide, and the volatile organic chlorine compound adhering to the gravel is peeled or eluted from the gravel and released from the contaminated area. The chemical reaction of magnesium oxide or calcium oxide with organic acid or carbon dioxide can be expressed by the following reaction formula. MO + 2RCOOH → M 2+ + 2RCOO − + H 2 O, MO + CO 2 → MCO 3 (M is Mg or Ca, R is an alkyl group). Next, the volatile organochlorine compounds released from the contaminated area are decomposed by using a groundwater flow to reach a purification point provided on the downstream side of the groundwater stream in the contaminated area. The reason why the organic acid and / or carbon dioxide supply point and the purification point are provided up to the bottom of the permeable layer is that volatile organic chlorine compounds are usually accumulated in the permeable layer through which groundwater passes above the hardly permeable layer. In addition, as shown in FIG. 1, a purification | cleaning point is provided so that it may reach even a poorly permeable layer, the groundwater containing a volatile organic chlorine compound is caught reliably at a purification | cleaning point, and the volatile organic chlorine compound contained in a groundwater is collected. It is desirable to ensure that it can be decomposed.

有機酸としてはクエン酸および／またはリンゴ酸が望ましい。供給ポイントから汚染領域への有機酸の供給は、有機酸の溶液を用いて行えばよい。   The organic acid is preferably citric acid and / or malic acid. The organic acid may be supplied from the supply point to the contaminated area using an organic acid solution.

供給ポイントから汚染領域への二酸化炭素の供給は、二酸化炭素を含む気体、例えば、排気ガスを少なくとも０．１ＭＰａ以上の圧力をかけて行うことが望ましいが、二酸化炭素を溶解した廃水を用いてもよい。   The supply of carbon dioxide from the supply point to the contaminated area is preferably performed by applying a gas containing carbon dioxide, for example, exhaust gas under a pressure of at least 0.1 MPa, or even using waste water in which carbon dioxide is dissolved. Good.

浄化ポイントには揮発性有機塩素化合物の脱塩素化作用を有する鉄、マグネシウム、アルミニウム、亜鉛、これらの金属の少なくとも１つを含む合金から選ばれる少なくとも１つの粉末を浄化剤として配置することが望ましい。浄化剤の配置の態様は特段限定されるものではなく、例えば、浄化剤となる金属粉末を含む汚泥を配置することで行えばよい。また、浄化剤となる金属粉末を充填した鉄管を複数本一箇所に密に埋設し、その周囲に鋼矢板からなる遮水壁を設けて揮発性有機塩素化合物を含む地下水を鉄管埋設箇所に誘導して行ってもよいし、浄化剤となる金属粉末を充填した鉄管を所定間隔で埋設して行ってもよい。   Desirably, at least one powder selected from iron, magnesium, aluminum, zinc, and an alloy containing at least one of these metals having a dechlorination action of a volatile organic chlorine compound is disposed as a purification agent at the purification point. . The arrangement | positioning aspect of a cleaning agent is not specifically limited, For example, what is necessary is just to carry out by arrange | positioning the sludge containing the metal powder used as a cleaning agent. In addition, multiple iron pipes filled with metal powder as a purifier are buried in one place, and a water-impervious wall made of steel sheet piles is provided around them to guide groundwater containing volatile organic chlorine compounds to the place where the steel pipe is buried Alternatively, an iron pipe filled with a metal powder serving as a purifier may be buried at a predetermined interval.

なお、浄化ポイントにさらに活性炭を配置したり、砂礫を混合したりすることで、浄化ポイントにおける揮発性有機塩素化合物の分解を効率よく行うことができる。   In addition, by further disposing activated carbon at the purification point or mixing gravel, the volatile organic chlorine compound at the purification point can be efficiently decomposed.

本発明は、地下水流を利用した簡易かつ効率的な揮発性有機塩素化合物で汚染された土壌の浄化方法を提供することができる点において産業上の利用可能性を有する。   INDUSTRIAL APPLICABILITY The present invention has industrial applicability in that it can provide a simple and efficient method for purifying soil contaminated with volatile organochlorine compounds using groundwater flow.

本発明の揮発性有機塩素化合物で汚染された土壌の浄化方法の概略を説明するための図である。It is a figure for demonstrating the outline of the purification method of the soil contaminated with the volatile organochlorine compound of this invention.

Claims (7)

揮発性有機塩素化合物で汚染された土壌の浄化方法であって、汚染領域の地下水流の上流側に透水層下部に至るまでの有機酸および／または二酸化炭素供給ポイントを設け、下流側に透水層下部に至るまでの浄化ポイントを設け、地下水流により、有機酸および／または二酸化炭素供給ポイントから有機酸および／または二酸化炭素を汚染領域に到達させて揮発性有機塩素化合物を汚染領域から遊離させ、汚染領域から遊離した揮発性有機塩素化合物を浄化ポイントに到達させて分解することを特徴とする浄化方法。   A method for remediating soil contaminated with volatile organochlorine compounds, wherein an organic acid and / or carbon dioxide supply point is provided upstream of the groundwater flow in the contaminated area to reach the bottom of the permeable layer, and the permeable layer is provided downstream. A purification point leading to the lower part is established, and the organic acid and / or carbon dioxide is made to reach the contaminated area from the organic acid and / or carbon dioxide supply point by the groundwater flow to release the volatile organochlorine compound from the contaminated area, A purification method comprising decomposing a volatile organic chlorine compound liberated from a contaminated area by reaching a purification point. 有機酸がクエン酸および／またはリンゴ酸であることを特徴とする請求項１記載の洗浄方法。   The cleaning method according to claim 1, wherein the organic acid is citric acid and / or malic acid. 二酸化炭素を含む気体を少なくとも０．１ＭＰａ以上の圧力をかけて供給することを特徴とする請求項１記載の浄化方法。   The purification method according to claim 1, wherein a gas containing carbon dioxide is supplied at a pressure of at least 0.1 MPa. 二酸化炭素を含む気体が排気ガスであることを特徴とする請求項３記載の浄化方法。   The purification method according to claim 3, wherein the gas containing carbon dioxide is exhaust gas. 浄化ポイントに浄化剤として鉄、マグネシウム、アルミニウム、亜鉛、これらの金属の少なくとも１つを含む合金から選ばれる少なくとも１つの粉末を配置することを特徴とする請求項１乃至４のいずれかに記載の浄化方法。   5. The powder according to claim 1, wherein at least one powder selected from iron, magnesium, aluminum, zinc, and an alloy containing at least one of these metals is disposed as a purification agent at the purification point. Purification method. 浄化ポイントにさらに活性炭を配置することを特徴とする請求項５記載の浄化方法。   6. The purification method according to claim 5, further comprising disposing activated carbon at the purification point. 浄化ポイントに砂礫を混合することを特徴とする請求項５記載の浄化方法。   6. The purification method according to claim 5, wherein gravel is mixed at the purification point.
JP2006102460A 2006-04-03 2006-04-03 Method of cleaning soil contaminated by volatile organic chlorine compound Pending JP2007275710A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006102460A JP2007275710A (en) 2006-04-03 2006-04-03 Method of cleaning soil contaminated by volatile organic chlorine compound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006102460A JP2007275710A (en) 2006-04-03 2006-04-03 Method of cleaning soil contaminated by volatile organic chlorine compound

Publications (1)

Publication Number Publication Date
JP2007275710A true JP2007275710A (en) 2007-10-25

Family

ID=38677778

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006102460A Pending JP2007275710A (en) 2006-04-03 2006-04-03 Method of cleaning soil contaminated by volatile organic chlorine compound

Country Status (1)

Country Link
JP (1) JP2007275710A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108654364A (en) * 2018-06-06 2018-10-16 青岛阿蒂特兰环保科技有限公司 Remove the method and its product soil-repairing agent of volatile organic matter in air

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000002676A1 (en) * 1998-07-10 2000-01-20 Hazama Corp. Method for purifying polluted soil and cleaning agent for soil purification
JP2004283693A (en) * 2003-03-20 2004-10-14 Fudo Constr Co Ltd Underground purification structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000002676A1 (en) * 1998-07-10 2000-01-20 Hazama Corp. Method for purifying polluted soil and cleaning agent for soil purification
JP2004283693A (en) * 2003-03-20 2004-10-14 Fudo Constr Co Ltd Underground purification structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108654364A (en) * 2018-06-06 2018-10-16 青岛阿蒂特兰环保科技有限公司 Remove the method and its product soil-repairing agent of volatile organic matter in air

Similar Documents

Publication Publication Date Title
JP5250975B2 (en) Soil and / or groundwater purification method
JP4766719B1 (en) Disposal method of leachate at final disposal site
JP5368201B2 (en) Method and apparatus for treating chemical contamination
JP4167052B2 (en) Purification method for organic compound contamination
JP2009148702A (en) Soil cleaning method
JP6626249B2 (en) In situ chemical immobilization of metal contaminants
JP2007275710A (en) Method of cleaning soil contaminated by volatile organic chlorine compound
JP2006341195A (en) Method of clarifying organic contaminant
JP5612820B2 (en) Purification method for organic chlorine chemical contamination
JP2005139328A (en) Remover of organochlorine compound and method for removing organochlorine compound
JP2006198476A (en) Method for making contaminated deposit harmless
JP2012135738A (en) Method for suppressing generation of hydrogen sulfide gas, and generation inhibitor for hydrogen sulfide gas
JP3725749B2 (en) Iron fine particle slurry and production method thereof, soil purification agent, and soil purification method
JP2004337777A (en) Method for removing contamination with chemical substance
JP2004261738A (en) Purification method for underground water polluted by cyanogen
KR20180043825A (en) A purification treatment method for a harmful substance-containing liquid and a purification treatment device for a harmful substance-containing liquid
JP5208599B2 (en) Purification of groundwater containing nitrate nitrogen
JP2015112512A (en) Sewage treatment method
JP4218564B2 (en) Method for purification of contaminated aquifer using purification agent for water containing pollutant
TW200626505A (en) Sewage treatment-recycling system and method thereof
JP4027209B2 (en) Purification method for contamination by chemical substances
JP2011156455A (en) In-situ purification method for contaminated underground water
JP4670029B2 (en) Soil purification method
JP2005349266A (en) Method for treating contaminated soil
JP2019162594A (en) Contaminated water purification method

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080125

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090402

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20101210

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110111

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110208

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20110830