弗雷德盐去除锑矿矿坑废水中的锑  

Removal of antimony in mine drainage by Friedel′s salts

作　　者：王宁宁 胡容 曹建新[1,2] 章兴华 陆洋 Wang Ningning;Hu Rong;Cao Jianxin;Zhang Xinghua;Lu Yang(School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China;Guizhou,Academy of Testing and Analysis;Key Laboratory for Green Chemical and Clean Energy Technology of Guizhou Province)

机构地区：[1]贵州大学化学与化工学院,贵州贵阳550025 [2]贵州省绿色化工与清洁能源技术重点实验室 [3]贵州省分析测试研究院

出　　处：《无机盐工业》2018年第5期54-58,共5页Inorganic Chemicals Industry

基　　金：贵州省省长专项资金项目(黔省专合[2009]72号);贵州省高层次人才特助经费资助(TZJF[2009]18号)

摘　　要：用盐-(羟)氧化物法合成了弗雷德盐,应用其层间阴离子交换反应特性对贵州省东峰锑矿矿坑废水中的锑做了去除实验。用弗雷德盐除锑,可在中性及碱性区域始终保持对锑的去除率≥97%,矿坑废水中的残余锑量为24.4~32μg/L,低于GB 30770—2014《锡、锑、汞工业污染物排放标准》中0.3 mg/L一个数量级。在中性及碱性条件下弗雷德盐是以层间Cl-对废水中的阴离子Sb(OH)_6^-进行交换。A Ca-Al layered double hydroxide（Friedel′s salt） was synthesized with the oxide-salt decomposition and co-precipitation method.The interlayer anionic exchange characteristics of Friedel′s salt was applied to carry out an experiment for removing antimony in drainage of Guizhou Province Dongfeng Mine.In the case of the neutral and alkaline conditions,the removal rate of antimony in drainage always kept over 97%,and the residual antimony concentrations in the treatment drainage were as low as 24.4-32 μg/L,which was an order of magnitude lower than 0.3 mg/L in the Emission Standards of Pollutants for Stannum,Antimony and Mercury Industry（GB 30770—2014）.In both neutral and alkaline conditions,the main mechanisms of antimony removal by Friedel′s salt were the ion exchange of interlayer Cl-with Sb（OH）6--.

关 键 词：弗雷德盐 矿坑废水 除锑 离子交换 

分 类 号：TQ135.31[化学工程—无机化工]