摘要
目前常用的铬渣处理方法存在铬形态不稳定、残留的酸溶性Cr(Ⅵ)易淋出等问题,该研究以添加还原剂的偏高岭土基矿物聚合物来直接处理铬渣,探索铬渣的一步解毒/固化及无害化利用。实验中将铬渣和偏高岭土混合用于制备矿物聚合物,加入Na_2S、Na_2SO_3、FeSO_4和FeCl_2作还原剂,改变还原剂的添加比例,对比制备的偏高岭土/铬渣基矿物聚合物固化体的浸出性毒性实验中Cr的浓度,选择最佳还原剂种类及比例。并在最佳还原剂的基础上,探索铬渣的最大处理量。
At present,the commonly used chromium residue treatment method has the problems of unstable form of chromium,acid soluble Cr(Ⅵ).In this study,chromium residue was treated directly by adding a reducing agent,and a step of detoxification/solidification and harmless utilization of chromium residue was explored.In the experiment,chromium residue and metakaolin were mixed to prepare geopolymer.Adding Na2S,Na2SO3,FeSO4 and FeCl2 as reducing agents,changing the proportion of reducing agents added,the concentration of Cr in the leachate toxicity experiments of the prepared metakaolin/chromium residue based geopolymer was compared,to select the best type and proportion of reducing agent.On the basis of the best reducing agent,the maximum treatment quantity of chromium residue is explored.
作者
刘明阳
董秋花
陈洁渝
熊晶
贺小敏
宋国强
LIU Mingyang;DONG Qiuhua;CHEN Jieyu;XIONG Jing;HE Xiaomin;SONG Guoqiang(Hubei Environment Monitoring Centre,Wuhan 430072,China;Wuhan Institute for Food and Cosmetic Control,Wuhan 430012,China;Institute of Materials Science and Chemical Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2019年第2期191-195,共5页
Environmental Science & Technology
基金
项目湖北省土壤风险评估成因研究(鄂财建发[2017]12号)
