The biosorption potential of modified sludge biomass (MSB) immobilized by various mechanisms was investigated for removal of Cu(II) and Cr(VI) metals. The sorption efficiency (mg g(-1)) decreased in the order Polyvinylalcohol-carboxymethylcellulose sodium salt-activated carbon (PVA-CMC-AC) > Polyvinyl alcohol-carboxymethylcellulose sodium salt (PVA-CMC) > Polyvinylalcohol (PVA) > calcium alginate (CA) under the optimized operating conditions as pH of 5.0, metal concentration of 0.1 g L-1, adsorbent loading as 0.1 g MSB/100 mL and treatment time of 85 min as established in the work. The equilibrium data fitted well with Langmuir isotherm model and pseudo first order kinetic model. 20% CaCl2 was established as best eluting agent and the regenerated adsorbent can be used in 5 cycles with marginally reduced efficacy. (C) 2016 Elsevier B.V. All rights reserved.