土著微生物修复Cr(Ⅵ)污染土壤还原后有效铬分析及其稳定性的初步实验研究  

Experimental Study on Reduction Remediation of Chromium(Ⅵ)-Contaminated soil by Aboriginal Microbe

作　　者：常文越[1] 陈晓东[1] 王磊[1] 徐佳玲[2] 

机构地区：[1]沈阳环境科学研究院,沈阳110016 [2]东北大学资源与土木工程学院,沈阳110004

出　　处：《环境保护科学》2008年第2期78-79,98,共3页Environmental Protection Science

摘　　要：通过铬(Ⅵ)污染土壤中筛选出的土著微生物对六价铬污染土壤的还原实验结果,对还原前后土壤中有效铬的含量进行了分析,并对还原后土壤进行了不同条件下的暴露,检测了土样中六价铬浸出毒性,结果表明,经过土著微生物还原后的土壤中,水溶性态铬与可交换态铬都得到了显著的降低,而且土壤浸出液中的六价铬也在不断地降低,说明微生物对六价铬的还原不仅能显著降低其毒性,而且还原产物还具有一定的稳定性。Based on the result of reduction experiment with aboriginal microbe screened from Cr（ Ⅵ ）--contaminated soil, the effective Chromium contamination before and after the reduction in the soil is analyzed. The toxicity of the Cr（ Ⅵ ） leachate in the soil is detected under different exposure conditions. The results show that after the reduction of aboriginal microbe, water--soluble form and exchangeable form of chromium in the soil have been lessened significantly, and so has Cr （Ⅵ ） in soil leachate,which indicates that the microbe can not only significantly lessen the toxicity,but also remains stable to some extent in reduction outcome.

关 键 词：土著菌 铬(Ⅵ)形态 稳定性 

分 类 号：X53[环境科学与工程—环境工程] S153.6[农业科学—土壤学]