Removal of Lead ions From Industrial Wasterwater by Mucor rouxii

Document Sample
Removal of Lead ions From Industrial Wasterwater by Mucor rouxii Powered By Docstoc
					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:


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.


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.