Study on Biosorption of Copper (II) Ion by Cladosporium sp
DONG Xinjiao,YU Linwei,ZHU Cong(Dept. of Biological & Environmental Science, Wenzhou Normal College, Wenzhou325003,China)
A strain of anti-cupric bacterium identified Cladosporium sp.was screened from electroplating sludge and pretreated with various concentrations of chemical reagents. The factors affecting the adsorption ability of the fungi and the pretreated fungi on Cu2+, such as initial pH, speed of shaker-bed and the contacting time were studied. The results show that the pretreated biomass with 0.2 mol/L NaOH has the maximum adsorption capacity. The uptake of copper was significantly affected by the initial pH of the solution and speed of shaker-bed. The optimal condition of native fungi and pretreated fungi was pH 4.0 and 5.0 respectively, speed of shaker-bed 100r/min. The adsorption was well accord with Langmuir isotherm under the concentration of Cu2+ 10～150mg/L. In the process of biosorption, pH changed in a certain pattern.