Leptosririllumferrooxidans-sulfide mineral interactions with reference to bioflotation nad bioflocculation  

作　　者：A. VILINSKA K. HANUMANTHA RAO 

机构地区：[1]Division of Mineral Processing, Lulea University of Technology, SE-971 87 LULEA, Sweden

出　　处：《中国有色金属学会会刊：英文版》2008年第6期1403-1409,共7页Transactions of Nonferrous Metals Society of China

基　　金：The financial support from the EU BioMinE project （contract No. IP NMP2-CT-2005-500329） is gratefully acknowledged.

摘　　要：铁的离子的粘附黄铁矿和黄铜矿矿物质上的成年 Leptospirillum ferrooxidans 房间通过吸附，希腊语的第六个字母潜力和弥漫的反射英尺红外被调查大小。当絮凝行为被 Turbiscan 大小检验时，矿物质 floatability 上的细菌的种类的影响被 Hallimond 筹款测试决定。矿物质等电位的点(pH 6.5 ? 7.5 ) 在和细菌的房间的相互作用向房间转移了等电位的点以后(pH 3.3 ) ，在矿物质上显示房间吸附的化学性质出现。与细菌的房间对待的矿物质的英尺红外系列显示出所有房间的存在功能的组意味着房间吸附。黄铜矿上的细菌的房间吸附与黄铁矿相比是更高的，它同意了房间与黄铁矿比较的黄铜矿筹款和显著絮凝行为上的更大的萧条效果。The adhesion of ferrous ions grown Leptospirillumferrooxidans cells on pyrite and chalcopyrite minerals was investigated through adsorption, Zeta-potential and diffuse reflectance FT-IR measurements. The influence of bacterial species on minerals floatability was determined by Hallimond flotation tests while the flocculation behaviour was examined by Turbiscan measurements. The minerals iso-electric point （pH 6.5-7.5） after interaction with bacterial cells shifted towards cells iso-electric point （pH 3.3）, indicating the chemical nature of cells adsorption on mineral surfaces. The FT-IR spectra of minerals treated with bacterial cells showed the presence of all the cell functional groups signifying cells adsorption. The bacterial cells adsorption on chalcopyrite was higher compared with pyrite, which agreed with cells greater depression effect on chalcopyrite flotation and pronounced flocculation behaviour in comparison with pyrite.

关 键 词：细菌 硫矿 絮凝 浮选 

分 类 号：TF18[冶金工程—冶金物理化学]