文献类型：期刊文章

作　　者：郭耀广[1] 黄鹏[1] 张武刚[1] 袁学武[1] 范凤霞[1] 王焕丽[1] 柳建设[1] 王兆慧[1]

机构地区：[1]东华大学环境科学与工程学院,国家环境保护纺织工业污染防治工程技术中心,上海201620

出　　处：《Transactions of Nonferrous Metals Society of China》

基　　金：Projects(41073060,21007009)supported by the National Natural Science Foundation of China;"Chen Guang" project(10CG34)supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation,China;Projects(20100075120010,20100075110010)supported by Research Fund for the Doctoral Program of Higher Education of China

年　　份：2013

卷　　号：23

期　　号：10

起止页码：3068-3075

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2013_2014、EBSCO、EI、IC、INSPEC、JST、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：AThe wastewater source of 4# tailing pond in Dexing copper mine consists of alkaline flotation pulp and acid mine drainage （AMD） from the nearby opencast mine. Therefore, the heavy metals in tailing ore are very likely to be released due to acidification from AMD. The leaching behaviors ofZn, Cu, Fe and Mn in mine tailings from Dexing copper mine were investigated by a series of laboratory batch experiments. The effectcs ofpH, temperature, particle size and contact time on the leachability of such heavy metals were examined. It was evident that Zn, Cu, Fe and Mn were major heavy metals in the tailings while gangue minerals like quartz were major constituents in examined tailings. The tailing dissolution reaction was controlled by the acid, whose kinetics could be expressed according to the heterogeneous reaction models and explained by a shrinking core model with the surface chemical reaction as the rate-controlling step. The leachability of all metals examined depended on pH and contact time. The batch studies indicated that the maximum leaching ratios ofZn, Cu, Fe and Mn at pH 2.0 were 5.4%, 5.8%, l 1.1% and 34.1%, respectively. The dissolubility of all metals examined was positively correlated to the temperatures. The particle size would not change dissolution tendency of those heavy metals, but decrease the concentrations of leached heavy metals.

关 键 词：LEACHING TAILINGS heavy metals  dissolution rate  

分 类 号：X753]