hexavalent chromium (Cr6 ) containing effluents. Since chromium is toxic to all life forms, its removal from effluents is the key … biosorption process for the removal of Cr6 from aqueous solutions using low-cost biomaterial viz. saw dust (SD). Optimum … parameters for maximum biosorption of Cr6 (10 mg/L) were as follows: pH 1-4, contact time 60 min and biomass quantity of 1 g/10 …