| "Fe0/优势脱氯菌"体系降解2,4,6-TCP特性及机制研究 |
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| 引用本文： | 戴友芝,郭丽丽,史雷,刘智勇,高宝钗."Fe0/优势脱氯菌"体系降解2,4,6-TCP特性及机制研究[J].环境科学,2012,33(8):2741-2746. |
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| 作者姓名： | 戴友芝 郭丽丽 史雷 刘智勇 高宝钗 |
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| 作者单位： | 湘潭大学环境科学与工程系, 重金属污染控制湖南省高校重点实验室, 湘潭 411105;湘潭大学环境科学与工程系, 重金属污染控制湖南省高校重点实验室, 湘潭 411105;湘潭大学环境科学与工程系, 重金属污染控制湖南省高校重点实验室, 湘潭 411105;湘潭大学环境科学与工程系, 重金属污染控制湖南省高校重点实验室, 湘潭 411105;湘潭大学环境科学与工程系, 重金属污染控制湖南省高校重点实验室, 湘潭 411105 |
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| 基金项目： | 国家自然科学基金项目(20977072) |
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| 摘 要： | 采用批处理实验方式,对"Fe0/优势脱氯菌"体系降解2,4,6-TCP过程进行研究,探讨了零价铁与微生物的协同作用及其机制.结果表明,Fe0对微生物具有促进生长和界面富集的作用,"Fe0/优势脱氯菌"体系菌浓度(D600表示)是单独优势脱氯菌体系的约1.7倍,反应96 h铁表面有大量细菌附着生长,其形态呈现短杆状或类球状;Fe0腐蚀产生的OH-对体系酸化起平衡调节作用,在pH值7.0、Fe0浓度5 g.L-1、2,4,6-TCP浓度30 mg.L-1的初始条件下,体系pH值稳定在7.8左右,有利于2,4,6-TCP还原脱氯反应的进行和优势脱氯菌的生长;2,4,6-TCP的主要降解路径为2,4,6-TCP→2,4-DCP→4-CP.
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| 关 键 词： | Fe0/优势脱氯菌 2 4 6-TCP 还原脱氯 界面富集 降解路径 |
| 收稿时间： | 2011/10/31 0:00:00 |
| 修稿时间： | 2011/12/27 0:00:00 |
Characteristics and Mechanism of 2,4,6-TCP Degradation by the "Fe0/Enriched-Bacteria" System |
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| DAI You-zhi,GUO Li-li,SHI Lei,LIU Zhi-yong and GAO Bao-chai.Characteristics and Mechanism of 2,4,6-TCP Degradation by the "Fe0/Enriched-Bacteria" System[J].Chinese Journal of Environmental Science,2012,33(8):2741-2746. |
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| Authors: | DAI You-zhi GUO Li-li SHI Lei LIU Zhi-yong and GAO Bao-chai |
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| Institution: | Hunan Province Key Laboratory of Heavy Metal Pollution Control, Department of Environmental Science and Engineering, Xiangtan University, Xiangtan 411105, China;Hunan Province Key Laboratory of Heavy Metal Pollution Control, Department of Environmental Science and Engineering, Xiangtan University, Xiangtan 411105, China;Hunan Province Key Laboratory of Heavy Metal Pollution Control, Department of Environmental Science and Engineering, Xiangtan University, Xiangtan 411105, China;Hunan Province Key Laboratory of Heavy Metal Pollution Control, Department of Environmental Science and Engineering, Xiangtan University, Xiangtan 411105, China;Hunan Province Key Laboratory of Heavy Metal Pollution Control, Department of Environmental Science and Engineering, Xiangtan University, Xiangtan 411105, China |
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| Abstract: | The synergistic mechanism of 2,4,6-trichlorophenol(TCP) degradation using a combination of Fe0and anaerobic dechlorinating bacteria with batch processing was investigated. Experimental results showed that under the conditions of pH 7.0,Fe0 5 g ·L-1 and 2,4,6-TCP 30mg ·L-1,the growth and interface enrichment of enriched-bacteria could be promoted by Fe0,the cell mass (expressed by D600) of Fe0/enriched-bacteria was about 1.7 times as high as that of the individual predominant groups of dechlorinating bacteria. After 96 h reaction, large amount of bacteria attached to the iron surface, with short rod or coccus-like morphology. The pH value of the system was maintained at 7.8, which could be beneficial to the reductive dechlorination reaction and the growth of the enriched-bacteria. The major pathway of 2,4,6-TCP degradation in the Fe0/enriched-bacteria system was 2,4,6-TCP to 2,4-DCP and then to 4-CP. |
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| Keywords: | Fe0/enriched-bacteria 2 4 6-trichlorophenol reductive dechlorination interface enrichment degradation pathway |
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