Biosorption of zinc and cadmium by Klebsiella pneumonia KM609983 isolated from Sohag, Egypt

Abstract

Biosorption experiments for zinc (Zn+2 ) and cadmium (Cd+2 ) were investigated in this study using living
and lyophelized biomass of a bacterial strain isolated from waste water of Rawafeih Al-Kusairdrainat,
Sohag governorate in Egypt. It was identified as Klebsiella pneumonia KM609983. The experimental
adsorption data were fitted towards the models postulated by Langmuir and Freundlich isotherms
equations. The maximum biosorption capacities for zinc and cadmium obtained by using lyophelized and
living cells were 243.9 and 227.3mg/g, respectively, indicating higher efficiency of lyophilized cells to
heavy metals compared to living cells.