氧化亚铁硫杆菌协同闪锌矿-MnO2的发电浸出  

Electrogenerative leaching for sphalerite-MnO2 in presence of A. ferrooxidans

作　　者：王少芬[1] 肖利[2] 方正[2] 邱冠周[3] 

机构地区：[1]长沙理工大学化学与环境工程学院,长沙410076 [2]中南大学化学化工学院,长沙410083 [3]中南大学资源加工与生物工程学院,长沙410083

出　　处：《中国有色金属学报》2008年第E01期42-46,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目（2004CB619204）;国家自然科学基金资助项目（50374077）;长沙理工大学资助项目

摘　　要：采用双电池系统研究了常规发电浸出过程和微生物协同发电浸出过程，考察了阳极、阴极极化，发电量、Zn^2＋和Fe^2＋的浸出率与时间的关系。结果表明，微生物协同发电浸出的浸出率和发电量比常规发电浸出的显著提高。其中，Zn^2＋的浸出率提高近60％，发电量增加约134％。采用电化学三电极系统研究了阳极和阴极的自腐蚀。结果表明，闪锌矿和MnO2的原电池作用在整个系统中占主导作用；微生物协同发电浸出过程中氧化亚铁硫杆菌（A.f菌）能氧化闪锌矿离解生成的单质硫，反应72h时，生物发电比例达31．72％。A dual cell system was used to study the electrogenerafive leaching for sphalerite-MnO2 in the presence of or in the absence of Acidithiobacillus ferrooxidans （A. ferrooxidans）. The polarization of anode and cathode, and the relationship between the electric quantity and some factors such as the dissolved Zn^2＋, Fe^2＋, the time, were studied. The results show that the dissolved Zn^2＋ content in the presence of A. ferrooxidans is nearly 60% higher than that in the absence ofA. ferrooxidans; the electrogenerative quantity in the former is about 134% larger than that in the latter. A three-electrode system was applied to study anodic and cathodic self-corrosion current, which was inappreciably compared with the galvanic current between sphalerite and MnO2. The accumulated sulfur on the surface of sulfides produced in the leaching process could be oxidized by A. ferrooxidans, and the ratio of biologic electric quantity reaches 31.72% within 72 h.

关 键 词：氧化亚铁硫杆菌 发电浸出 闪锌矿 

分 类 号：TF111.3[冶金工程—冶金物理化学]