不同修复方法对铬污染土壤中六价铬修复效果研究  

Remediation Effect of Different Remediation Methods on Hexavalent Chromium in Chromium-contaminated Soil

作　　者：董芬 Dong Fen(Science Enviromental Protection Co.,Ltd.,Changsha 410000,China)

机构地区：[1]赛恩斯环保股份有限公司,湖南长沙410000

出　　处：《广东化工》2021年第8期230-231,共2页Guangdong Chemical Industry

摘　　要：以湖南省某铬污染场地中的污染土壤为讨论对象,对其在实验室中进行模拟修复,探讨化学固定修复工艺、菌液单次淋洗+化学固定修复工艺、菌液循环淋洗+化学固定修复工艺对土壤中Cr(Ⅳ)的修复效果。结果表明,化学固定工艺总药剂用量需要达到19%以上;经菌液单次淋洗后,再使用化学药剂,总药剂用量需要4.5%;而使用菌液淋洗循环淋洗5天,再使用化学药剂,总药剂用量仅需2.2%。菌液可有效淋洗出土壤中的Cr(VI),降低了土壤中Cr(VI)的含量,也大大降低了化学药剂的使用量。The contaminated soil of a chromium-contaminated site in Hunan Province was restored in a laboratory. The reduction of chemical fixation remediation process、single bacterial leaching combined with chemical fixation remediation process、bacterial circulating leaching combined with chemical fixation remediation process on Cr(IV) in soil. The results show that the total dosage of chemical fixation process needs to be more than 19 %;after single bacterial leaching,the total dosage of chemical agent needs to be 4.5 %;while the total dosage of chemical agent only needs to be 2.2 % when bacterial circulating leaching is used for 5 days. The bacteria liquid can effectively leach out Cr(VI) in the soil, reduce the content of Cr(VI) in the soil, and greatly reduce the use of chemical agents.

关 键 词：铬污染土壤 微生物修复 化学修复 六价铬 药剂用量 

分 类 号：X5[环境科学与工程—环境工程]