铜镉渣中Cd的生物浸出技术  

Investigation on Bio-leaching of Cd from Cu/Cd smelting slag

作　　者：成应向[1,2] 王强强[1,2,3] 钟振宇[1,2] 许友泽[1,2] 

机构地区：[1]湖南省环境保护科学研究院,长沙410004 [2]水污染控制技术湖南省重点实验室,长沙410004 [3]温州市环境保护设计研究院,温州325000

出　　处：《环境化学》2013年第2期259-266,共8页Environmental Chemistry

基　　金：湖南省科研机构技术创新发展专项基金支持项目(2010TF1012)资助

摘　　要：以课题组分离纯化后的Bacillus spp.菌属为原始菌种,经扩大培养后用于浸出铜镉渣中的有价金属Cd,通过摇瓶实验考察浸出时间、矿浆浓度、培养基pH值及浸出温度对Cd浸出率的影响,并初步探索Bacillusspp.菌属浸出铜镉渣中有价金属的浸出机制.研究结果表明,该Bacillus spp.菌属能够有效浸出铜镉渣中的Cd,浸出效果受浸出时间、矿浆浓度、培养基pH及浸出温度的影响.最佳浸出条件为,浸出时间为5 d、矿浆浓度为4%、培养基pH为3、浸出温度为30℃;在最优条件下Cd浸出率高达99%;在最优浸出条件下对铜镉渣Zn也具有良好的浸出效果,浸出率可达95%以上,但对Pb、Cu、As等金属的浸出效果不佳.The bacteria Bacillus spp.were used for Cd leaching from Cu/Cd smelting slag after group separation and purification.The effects of leaching time,pulp density,medium pH value and leaching temperature on Cd leaching rate were investigated through the experiments of shake flask.The preliminary exploration of leaching mechanism were performed.The results show that Cd in the Cu/Cd smelting slag could be effectivey leached by Bacillus spp.Leaching time,pulp density,medium pH and the leaching temperature affected bio-leaching rate.The bio-leaching rate of Cd in the Cu/Cd smelting slag under the optimized conditions（pH3,temperature 30 ℃,4% pulp density and a leaching time of 5 d）was 99%.The bio-leaching rate of Zn in the Cu/Cd smelting slag was over 95% under the same conditions.However,metal leaching of Pb,Cu,As were ineffective.

关 键 词：铜镉渣 微生物浸出 CD 

分 类 号：X705[环境科学与工程—环境工程]