The Use of Immobilised Rhizopus oryzae as a Biosorbent for Reactive Dye and Metal Ions

Rhizopus oryzae can biosorb reactive dye, copper, and cadmium ions from aqueous solution. This paper investigates the possibility of further improving this biosorptive performance by immobilising R. oryzae in polyurethane support particles. The immobilisation procedure increased uptake of dye, Cu2+, and Cd2+ by 50,41 and 32% respectively. The biosorption mechanism involved in uptake by the immobilised biomass was marginally better described by the Langmuir adsorption isotherm.