Biosorption of Bacillus circulans and Bacillus mucilaginosus on the Surface of Diaspore, Kaolinite and Quartz

摘要

The effects of biosorption time and cell concentration on adsorption amount on the surface of diaspore, kaolinite and quartz were studied by using two kinds of silicate bacteria - Bacillus circulans and Bacillus mucilaginosus, and three kinds of silicate minerals. The experimental results show that two kinds of silicate bacteria absorb more easily on the surface of diaspore than on that of kaolinite and quartz, and the adsorption amount of the strain of B·M is always higher than that of the strain of B·C on the surface of diaspore, kaolinite and quartz. The possible reason is that the pH_(PZC) of diaspore is higher than that of kaolinite and quartz, and the strain of B·M probably produce more metabolites charged negatively than that of B·C in incubation process.