摘要
试验用零价铁(Fe0)和活性炭作为反应介质,设计渗透反应格栅(PRB),对六价铬[Cr()]污染地下水进行了实验室修复研究。试验结果表明:活性炭对Cr有一定的吸附作用;Fe0对Cr()有较强的还原作用;Fe0和活性炭的协同作用有效地增强了Fe0PRB的处理能力;可以使Cr()从20mg/L降低到0.05 mg/L以下。冲洗试验表明,Fe0还原Cr()生成Cr(),Cr()生成Cr(OH)3沉淀,而没有随着水体流动而流失到"下游"水体中。实验结果说明PRB技术治理Cr()污染地下水是可行的。
In this paper,zero valent iron and activated carbon were used to design permeable reactive barrier（PRB） to study the feasibility and the efficiency of PRB technology in the remediation of chromium-polluted groundwater.The results showed that activated carbon absorbed some chromium,zero valent iron strongly reduced Cr（Ⅵ）,and the synergic effects can improve the remediation capacity of Fe^0 PRB,Cr（Ⅵ） decreased from 100 mg/L to less than 0.05 mg/L,which meets the water quality standard for drinking water.Dynamic PRB flushing experiments showed that the Cr^3＋ generated from Cr^6＋ were reduced to form Cr（OH）3 and precipitated other than transported to the ＂downstream＂ water body.Based on the lab experimental results,it is feasible to remediate Cr（Ⅵ）polluted groundwater by Fe0 PRB.
出处
《地下水》
2007年第4期96-99,共4页
Ground water
关键词
PRB
六价铬
零价铁
活性炭
PRB
Hexavalent Chromium
zero valent iron
activated carbon
