The Biosorption of Lead Ions onto Mucor rouxii Chun Chiu Li, Kim Hung Lam and Waihung Lo* Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong. * Corresponding author; E-mail: email@example.com Abstract The removal of lead from aqueous solutions by adsorption on filamentous fungal biomass was studied. Batch biosorption experiments were performed to screen a series of selected filamentous fungal strains for effective lead removal at different metal and biomass concentrations. The biosorption of lead ions was strongly affected by pH. The fungal biomass exhibited the highest lead adsorption capacity at pH 6. The biosorption of lead ions was not significantly inhibited by the concentrations of anions and organics. Equilibrium isotherms for the biosorption of lead on fungal biomasss were developed and the equilibrium data fitted well to the Langmuir isotherm model. The kinetics of lead biosorption was well simulated by a pseudo-second order rate equation. The biomass of Mucor rouxii showed specific selectivity for lead over other metal ions such as zinc, nickel and copper. This fungal strain may be applied to develop potentially cost-effective biosorbents for removing lead from effluents. References 1. Lo, W.; Chua, H.; Lam, K.H. and Bi, S.P., Chemosphere, 1999, 39, 2723-2736. 2. Volesky, B. and Holan, Z.R., Biotech. Prog., 1995, 11, 235-250.