Column sorption of Cr(VI) from electroplating effluent using formaldehydecross-linked Saccharomyces cerevisiae

摘要

Pellets of Saccharomyces cerevisiae, cross-linked by 13 % (w/v) formaldehyde, were used in fixed-bed columns to remove Cr(VI) from electroplating rinse effluent at varied influent pHs (2.5-7.5). The Cr uptake at 60 % saturation of the biomass was 6.3 mg/g at an optimum pH of 2.5. Desorption of the bound metal was partially achieved by washing the column biomass with a combined solution of 1 % (w/v) formaldehyde and 1 M HNO3.