| "Fe0/优势脱氯菌"体系降解2,4,6-TCP特性及机制研究 |
| 摘要点击 2746 全文点击 1598 投稿时间：2011-10-31 修订日期：2011-12-27 |
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| 中文关键词 Fe0/优势脱氯菌 2,4,6-TCP 还原脱氯 界面富集 降解路径 |
| 英文关键词 Fe0/enriched-bacteria 2,4,6-trichlorophenol reductive dechlorination interface enrichment degradation pathway |
| 作者 | 单位 | E-mail | | 戴友芝 | 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 | daiyouzhi202@163.com | | 郭丽丽 | 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 | | | 史雷 | 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 | | | 刘智勇 | 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 | | | 高宝钗 | 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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| 中文摘要 |
| 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30mg ·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. |
| 英文摘要 |
| 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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