摘要
在有 Acidithiobacillus ferrooxidans 和 Acidithiobacillus caldus 的生物调节以后的黄铜矿的表面性质的改变被希腊语的第六个字母潜力，吸附研究，英尺红外系列和接触角度测量评估。希腊语的第六个字母潜力学习在细菌的处理以后的黄铜矿的等电位的点(IEP ) 向纯房间的 IEP 移动的表演，显示黄铜矿表面上的房间的吸附。与细菌的房间对待的黄铜矿的英尺红外系列显示出房间的存在功能的组意味着房间吸附。由于黄铜矿表面上的元素的硫和中间的铜硫醚的形成，接触角度和黄铜矿的表面 hydrophobicity 在起始的 bioleaching 阶段增加。由 Acidithiobacillus ferrooxidans 的黄铜矿 bioleaching 有更高的铜抽取，它同意在黄铜矿表面上吸附的 Acidithiobacillus ferrooxidans 是多于 Acidithiobacillus caldus 的大部分的事实。结果在 bioleaching 黄铜矿支持硫化物氧化的直接机制。
The alteration of surface properties of chalcopyrite after biological conditioning with Acidithiobacillusferrooxidans and Acidithiobacillus caldus was evaluated by Zeta-potential, adsorption studies, FT-IR spectra and contact angle measurement. The Zeta-potential studies show that the iso-electric point（IEP） of chalcopyrite after bacterial treatment moves towards the IEP of pure cells, indicating the adsorption of cells on chalcopyrite surface. The FT-IR spectra of chalcopyrite treated with bacterial cells show the presence of the cell functional groups signifying cells adsorption. Due to the formation of elemental sulfur and intermediate copper sulphides on chalcopyrite surface, the contact angle and surface hydrophohicity of chalcopyrite increase at the initial bioleaching stage. Chalcopyrite bioleaching by Acidithiobacillus ferrooxidans has higher copper extraction, which agrees with the fact that Acidithiobacillus ferrooxidans adsorbed on chalcopyrite surface is much more than Acidithiobacillus caldus. The results support the direct mechanism of sulfide oxidations in bioleaching chalcopyrite.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2008年第6期1421-1426,共6页
Transactions of Nonferrous Metals Society of China
基金
Project(2004CB619204)supported by the National Basic Research Program of China
Projects(50621063 50674102)supported by the National Natural Science Foundation of China
关键词
黄铜矿
生物浸取
微生物
吸附作用
表面性质
chalcopyrite
microorganism
bioleaching
adsorption
surface properties
