Biosorption of Pb2+ by Bacillus cereus Biomass
蜡状芽孢杆菌Bacillus cereus吸附铅的研究

In this paper, the potentiometric titration and the sorption experiments were applied to investigate the biosorption behavior of Pb2+ on Bacillus cereus biomass. It was shown that the biosorption capacities increased with increasing pH from 3 to 7, and the higher concentration of the biomass in solution was favorable to the sorption of Pb2+. Langmuir model simulated the adsorption data of Pb2+ ion very well, and the saturated sorption capacity for Pb2+ ion achieved 36 7mg·g-1 dry biomass. According to the result of the potentiometric titration, the Gran plots for the hydroxide back titration of biomass suspension systems were utilized to derive the specific volume of titrant at the equivalence point (Ce), furthermore, the total surface site concentration was calculated.