土著微生物柱浸修复铬渣堆场土壤污染

journal6 ›› 2010, Vol. 31 ›› Issue (3): 90-94.

土著微生物柱浸修复铬渣堆场土壤污染

（1.水污染控制湖南省重点实验室，湖南长沙 410004；2.中南大学冶金科学与工程学院，湖南长沙 410083）

出版日期:2010-05-25 发布日期:2012-04-17
作者简介:许友泽（1985-），男，安徽六安人，湖南省环境保护科学研究院助理研究员，硕士，主要从事重金属污染防治研究.
基金资助:
国家高科技术研究发展计划（863）项目（2006AA06Z374）

Column Leaching and Reduction of Cr (Ⅵ) by Indigeous Microorganism in the Soils Contaminated by Chromium-Containing Slag

(1.Hunan Key Laboratory of Water Pollution Control Technology,Changsha 410004，China;2.School of Metallurgical Science & Engineering,Central South University,Changsha 410083,China)

Online:2010-05-25 Published:2012-04-17

摘要/Abstract

摘要：采用柱浸试验研究土著微生物对铬渣堆场污染土壤中Cr(Ⅵ)的修复.通过单因素实验测定土壤初始Cr(Ⅵ)浓度、浸出液pH值及循环淋溶时间对修复效果的影响，结果表明：加入培养基能完全修复铬渣堆场污染土壤中水溶性Cr(Ⅵ)，柱浸实验结束后，浸出液中Cr(Ⅵ)浓度由初始的700.3 mg/kg降低至检出限以下；土壤中初始Cr(Ⅵ)浓度越低修复效果越好；培养基最佳pH值范围为7.5~8.5；循环淋溶修复效果好于非循环柱浸修复，循环时间越长，修复效果越好，最佳循环时间为全天循环.

关键词： 土著微生物, 柱浸, 铬渣堆场污染土壤, 修复, 六价铬

Abstract: The reduction of Cr(Ⅵ) in chromium-contaminated soils by indigeous microorganism was investigated with column experiments.The effects of initial Cr(Ⅵ) concentration,pH of leachate and circulation leaching time on reduction were investigated by single factor experiment.The results showed that the water soluble Cr(Ⅵ) in soils was completely remediated when culture medium was added,and Cr(Ⅵ) concentration in leachate decreased from 700.3mg/kg to the concentration lower than detectable level after column leaching.Low initial Cr(Ⅵ) concentration resulted in high Cr(Ⅵ) removal effectiveness.The optimum pH range was 7.8~8.5.The circulation leaching had better remediation effectiveness,more circulation time resulted in better removal effectiveness and the optimal circulation time was whole day circulation leaching.

Key words: indigeous microorganism, column leaching, soils contaminated by chromium-containing slag, reduction, Cr(Ⅵ)

许友泽, 向仁军, 柴立元, 杨志辉. 土著微生物柱浸修复铬渣堆场土壤污染[J]. journal6, 2010, 31(3): 90-94.

XU You-Ze, XIANG Ren-Jun, CHAI Li-Yuan, YANG Zhi-Hui. Column Leaching and Reduction of Cr (Ⅵ) by Indigeous Microorganism in the Soils Contaminated by Chromium-Containing Slag[J]. journal6, 2010, 31(3): 90-94.

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