铬污染土壤药剂稳定化研究  

Study on Chemical Stabilization of Chromium Contaminated Soil

作　　者：翟苏辉 高炳娜 Zhai Suhui;Gao Bingna(Dongguan Borun Environmental Protection Technology Co.,Ltd.,Dongguan 523000;Shijiazhuang Zhaoxian Environmental Monitoring Center,Shijiazhuang 050000,China)

机构地区：[1]东莞博润环保科技有限公司,广东东莞523000 [2]石家庄市赵县环境监控中心,河北石家庄050000

出　　处：《广东化工》2021年第7期142-142,139,共2页Guangdong Chemical Industry

摘　　要：本文以外源添加重铬酸钾的方式制备模拟铬污染土壤,采用硫酸亚铁和碳酸钙对铬污染土壤进行稳定化研究。试验结果表明:当Fe^(2+)与Cr^(6+)化学计量比为6时,硫酸亚铁对六价铬的还原率达到99.51%;与对照相比,FeSO_(4)可使Cr浸出毒性降低95.94%,硫酸亚铁与碳酸钙联用后Cr浸出毒性降低99.49%~99.86%,且在碳酸钙添加量超过3%时Cr浸出毒性基本保持不变。In this study, experimental soils are synthesized by adding K2 Cr2 O7. Using FeSO4-CaCO3 to stabilize contaminated soil with chromium. The results showed that when the stoichiometric ratio of Fe^(2+) to Cr^(6+) was 6, the reduction rate of ferrous sulfate to hexavalent chromium reached 99.51 %;FeSO_(4) can reduce the leaching toxicity of Cr to 95.94 %, and the leaching toxicity of Cr can be reduced by 99.49 %~99.86 % after the combination of ferrous sulfate and calcium carbonate,and the leaching toxicity of Cr remains basically unchanged when the addition of calcium carbonate is more than 3 %.

关 键 词：铬污染 土壤修复 稳定化 浸出毒性 

分 类 号：X5[环境科学与工程—环境工程]