成功地应用了多黏牙胞杆菌及其代谢产物,从石英或方解石中浮选或絮凝出黄铜矿,以保护环境和富集矿物。吸附研究结果表明,细菌细胞在黄铜矿上的吸附量比在石英和方解石上的吸附量高得多。还研究了矿物与细菌细胞作用前后矿物表面的动电行为。分离出了细菌副产品(如细菌外细胞蛋白质和细菌外细胞多糖) ,并研究了它们对矿物絮凝和浮选过程的影响。矿物与细菌外细胞蛋白质作用后,可从石英和方解石中选择性分离出黄铜矿。细菌外细胞蛋白质絮凝黄铜矿,而分散石英。因此,生物蛋白质可提高石英的疏水性,因此可从黄铜矿中选择性浮选出石英 Bacillus polymyxa and its metabolites have been successfully used to flotate or flocculate chalcopyrite from quartz or calcite to protect the environment and enrich the minerals. Adsorption studies showed that bacterial cells adsorbed more amounts of chalcopyrite than quartz and calcite. The electrokinetic behavior of mineral surfaces before and after mineral and bacterial cells were also studied. Bacterial byproducts (such as bacterial extracellular cellular proteins and bacterial exopolysaccharides) were isolated and their effects on mineral flocculation and flotation were investigated. Chalcopyrite can be selectively separated from quartz and calcite after interaction between minerals and bacterial extracellular proteins. Bacterial outer cell proteins flocculate chalcopyrite while dispersing quartz. Therefore, the biological protein can improve the hydrophobicity of quartz, so the selective flotation of quartz from chalcopyrite