摘要
研究了多硫化钙对Cr(Ⅵ)的去除情况,确定了反应的最佳物质的量比和反应时间,并通过砂柱实验模拟了多硫化钙对Cr(Ⅵ)修复情况。结果表明,多硫化钙与Cr(Ⅵ)反应最佳物质的量比为2∶1,最佳反应时间为2 h,反应产物中Cr主要以沉淀的形式存在。动态砂柱实验表明,采用3∶1的比例,既能让Cr(Ⅵ)浓度达标,又能降低修复成本。
The removal of Cr(Ⅵ)with calcium polysulfide is studied,and the optimal molar ratio and reaction time are determined.The remediation effect of Cr(Ⅵ)with calcium polysulfide is simulated by sandcolumn experiment.The results show that the best molar ratio of calcium polysulfide with Cr(Ⅵ)is 2∶1,and the best reaction time is 2 h.Cr in the reaction product mainly existes in the form of precipitation.The dynamic sand column experiment shows that the ratio of 3∶1 can not only make Cr(Ⅵ)concentration reach the standard,but also reduce the remediation cost.
作者
李慧芳
陈文芳
刘自富
陈磊磊
田源
周文
吴超峰
LI Huifang;CHEN Wenfang;LIU Zifu;CHEN Leilei;TIAN Yuan;ZHOU Wen;WU Chaofeng(The First Geological Environment Survey Institute,Henan Bureau of Geology and Mineral Exploration and Development,Zhengzhou 450000,China;Henan Geological Environment Ecological Restoration Engineering Technological Research Center,Zhengzhou 450000,China)
出处
《河南化工》
CAS
2022年第5期26-29,48,共5页
Henan Chemical Industry
基金
河南省自然资源科研项目(豫自然资函〔2019〕373号-8)。
关键词
铬污染
多硫化钙
地下水
chromium pollution
calcium polysulfide
groundwater
