Removal of Nickel from simulated wastewater using granular dead anaerobic sludge

Abstract

The possibility of using sewage sludge for treatment of water contaminated with nickel ions was investigated. Batch tests were conducted to evaluate the equilibrium sorption properties of the granular dead anaerobic sludge in nickel-containing aqueous solutions. Contact time, initial pH, initial concentration, sorbent dosage and agitation speed were found to be the most factors influenced on the treatment process. The best values of these parameters that will achieved removal efficiency of nickel (=99.5%) were 1h, 5, 50 mg/L, 0.2 g/100 ml and 300 rpm respectively. The results signified that the Langmuir isotherm model is a suitable for the sorption data of nickel by sewage sludge under the studied conditions.