Studies on Biosorption Equilibrium and Kinetics of Cu(II) by Bacillus cereus B-11

摘要

The Cu(II) biosorption characteristics of Bacillus cereus B-11 biomass was examined as a function of initial pH, contact time, and initial metal ion concentration. The pseudo-second-order kinetic model was found to be well-suited for the entire adsorption process of Cu(II) on B-l 1. Langmuir and Freundlich models were applied to describe the biosorption isotherm of the copper ions by B-11 biomass. Langmuir model fitted the equilibrium data was better than the Freundlich isotherm. The maximum binding capacity of Cu(II) according to the Langmuir isotherm was 88.14 mg/g at pH 6.5 and shaker speed was 150 rpm at 27 °C and for 60 min. The present study indicates that B-l 1 biomass may be used as an inexpensive, effective, and easily cultivable biosorbent for the removal of Cu(II) ions from environmental and industrial wastewater.