In-situ Remediation of Contaminated Soil with Chlorinated Organic Compounds using Natural Activity

利用自然活性对含氯有机化合物污染的土壤进行原位修复

• 批准号: 17206089
• 负责人: INOUE Chihiro
• 金额: $ 32.12万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17206089/
• 关键词: Soil Remediation; Chlorinated Organic Compounds; Dechlorination Reaction; Pyrite; Iron Sulfide; Microorganisms; MNA; Dioxin; 有機塩素系化合物

The purpose of this study was to develop remediation system for contaminated soils with chlorinated organic compounds using effectively with dechlorination reactions with natural minerals and microorganisms. Main research results are as follows.1. Dechlorination reaction of TCE with pyrite progressed well in aerobic condition rather than in anaerobic condition. TCE was converted to carbon dioxide and chlorine ion via organic acids. Pyrite was oxidized and converted to sulfate and iron ion. Reaction rate of this reaction depended on the oxygen concentration.2. TCE dechlorination with sulfide minerals such as iron sulfide, chalcopyrite and so on progressed in anaerobic condition. Pyrite gave maximum reaction rate in the experiment.3. TCE was completely dechlorinated to ethane by anaerobic microbial consortium obtained from sulfate reducing environment. It was found that control of methane producing bacteria was important factor for the TCE decomposition by this consortium.4. Long-term data for the attenuation of chlorinated organic compounds in groundwater in several contaminated sites were collected and analyzed. Main factor of the attenuation was revealed by the analysis.5. Behavior of chlorinated organic compounds such as TCE in the contaminated site was predicted using transport model containing adsorption to soil particles, diffusion in groundwater and decomposition with microbial and mineralogical reaction of the compounds.6. From these results, soil remediation process contaminated with chlorinated organic compounds was basically designed. The combined process consists of mixing of pyrite with the contaminated soil and activation of degrading bacteria in the microbial community.7. Chlorinated aromatic compounds such as chlorobenzenes were also decomposed by pyrite in aerobic and anaerobic systems. These results indicate the possibility of decomposition of dioxins and their derivatives by pyrite in aqueous system.

本研究的目的是开发有效利用天然矿物和微生物进行脱氯反应的氯代有机化合物污染土壤的修复体系。主要研究成果如下：1.研究成果。TCE与黄铁矿的脱氯反应在好氧条件下进行得很好，而不是在厌氧条件下。TCE通过有机酸转化为二氧化碳和氯离子。黄铁矿被氧化转化为硫酸盐和铁离子。该反应的反应速率取决于氧气的浓度。利用硫化铁、黄铜矿等硫化矿物在厌氧条件下进行TCE脱氯。黄铁矿在实验中反应速率最大。从硫酸盐还原环境中获得的厌氧菌群可将TCE完全脱氯为乙烷。研究发现，产甲烷细菌的控制是该菌群降解三氯乙烯的重要因素。收集和分析了几个污染场地地下水中氯有机化合物衰减的长期数据。通过分析，揭示了影响衰减的主要因素。利用迁移模型预测了TCE等氯化有机化合物在污染场地的行为，该模型包含了TCE对土壤颗粒的吸附、在地下水中的扩散以及化合物与微生物的分解和矿物反应。根据这些结果，初步设计了含氯有机物污染的土壤修复工艺。该组合工艺包括黄铁矿与受污染土壤的混合和微生物群落中降解菌的激活。在好氧和厌氧系统中，黄铁矿也能分解氯代苯等氯代芳香族化合物。这些结果表明，在水相体系中，二恶英及其衍生物可能被黄铁矿分解。

项目成果

黄鉄鉱によるクロロプロパン・クロロプロペンの脱塩素反応

利用黄铁矿进行氯丙烷和氯丙烯的脱氯反应

• 发表时间: 2006
• 期刊: 資源・素材学会秋季大会講演要旨集
• 作者: 狐塚勝司;原淳子;須藤孝一;井上千弘
• 通讯作者: 井上千弘

長期間継代培養した嫌気微生物群によるTCEの無害化

厌氧微生物长期传代对TCE的解毒作用

• 发表时间: 2006
• 期刊: 平成18年度日本生物工学会大会講演要旨集
• 作者: 伊勢孝太郎;須藤孝一;井上千弘
• 通讯作者: 井上千弘

Long-term Anaerobic Subculture Obtained from a TCE-contaminated Site

从 TCE 污染场地获得的长期厌氧亚培养物

• 发表时间: 2006
• 期刊: Proceedings of the Society for Biotechnology, Japan Annual Meeting 2006
• 作者: Qi;ZHANG;Jyun;HATAKEYAMA;Lu;ZHOU;Yu;GUO;Makoto;SAKURAI;Hideo;KAMEYAIVIA;S. Sato et. al.;金森敏幸;T. Morikawa et. al.;Keigo Matsuda;M. Kitsunezuka et. al.;K. Ise et. al.
• 通讯作者: K. Ise et. al.

Dechlorination of Chlorinated Organic Compounds with Sulfide Minerals

用硫化矿物脱氯有机氯化物

• 发表时间: 2005
• 期刊: Proceedings of 11th Symposium on Groundwater and Soil Contamination and Remediation
• 作者: T.;Kanamori;J. Hara et. al.
• 通讯作者: J. Hara et. al.

Long-Term Persistence of Cyclodiene Pesticide in Soil

环二烯农药在土壤中的长期残留

• 发表时间: 2007
• 期刊: 4th International Workshop on Water Dynamics, AIP Conference Proceedings 898
• 作者: 原田浩平;他;J. Hara and Y. Kawabe
• 通讯作者: J. Hara and Y. Kawabe