环境工程学报2017，Vol.11Issue(11)：6163-6168,6.DOI:10.12030/j.cjee.201702022
铬污染土壤的还原稳定化修复
Experimental research onstabilization remediation of chromium contaminated soil
摘要
Abstract
Different proportions of FeSO4 · 7H2O,mixture of FeSO4 · 7H2O and Ca(OH)2 and NaHSO3,were added in the chromium polluted soil collected from an industrial area in Hunan Province.The efficiencies of 3 different stabilizers on the remediation of chromium contaminated soil were compared based on the contents of hexavalent chromium,total chromium and chromium of different forms in soil and leaching liquids.The results show that both FeSO4 · 7H2 Oand NaHSO3 can effectively reduce the leaching concentration of hexavalent chromium and total chromium.When dosing quantity of FeSO4 · 7H2O was 2％,reduction of hexavalent chromium and total chromium in the leaching liquid of the contaminated soil were 99.0％ and 57.5％,respectively.When dosing quantity of NaHSO3 was 0.8％,reduction of hexavalent chromium and total chromium in the leaching liquids of the contaminated soil were 97.7％ and 42.2％,respectively.Compared with the former two stabilizers,stabilization effect of the mixture of FeSO4 · 7H2O and Ca(OH)2 was poor.FeSO4 · 7H2O can transform the active exchangeable and carbonate chromium to the stable organic and residual chromium;NaHSO3 can mainly transform exchangeable and carbonate chromium to the relatively stable manganese-iron combination state,which is the reason why its stabilization efficiency is worse than FeSO4 · 7H2O.关键词
铬/六价铬/稳定化/重金属形态Key words
chromium/hexavalent chromium/stabilization/heavy metal form分类
资源环境引用本文复制引用
张辉,付融冰,郭小品,宋召凤,陈小华..铬污染土壤的还原稳定化修复[J].环境工程学报,2017,11(11):6163-6168,6.基金项目
上海市自然科学基金资助项目(07ZR14090) （07ZR14090）
上海市环保科研重大项目(沪环科(2013-04)) （沪环科(2013-04）
上海市环保科研青年基金项目(沪环科(2015-105)) （沪环科(2015-105）
上海领军人才项目(011) （011）
