Study on adsorption of lead by biochar prepared from sludge of municipal wastewater treatment plant

Abstract

In general, with the increase of pyrolysis temperature, the adsorption effect of the prepared biochar to Pb2+ is better.Under the same experimental conditions at 25°C, the adsorption capacity of biochar prepared by pyrolysis of sludge at 600°C was highest which was 611.8 mg/g. The adsorption kinetics of Pb2+ in solution by BC600 is better fitted to the first order kinetic equation. With the increase of pH value of solution, the adsorption capacity of lead increased from 441.3 mg/g to 650.6 mg/g.