Study on Optimum Conditions of Peat Adsorbing Cu~(2+) and Pb~(2+) in Heavy Metal Water
An Ying, Sun Liping(Department of Environmental and Municipal Engineering, Tianjin Institute of Urban Construction, Tianjin, 300384)
Because of enriching with organic matter and humic acid, which contain lots of polarity groups, peat has strong adsorption on metal cations. This paper mainly discussed the adsorption conditions of Cu2+ and Pb2+ in water, and obtained the optimum conditions. When the concentration of the ion was 30 mg/L, peat addition was 7 g/L and 5 g/L, respectively, and the best adsorption pH value was 5 and 8, respectively, and the adsorption times were both 30 minutes. With the concentration of the ion increasing, the apparent adsorption capacities increased, but the removal rates for the ions decreased. The apparent adsorption capacity and removal rate were 4.24 mg/g and 98.8% for Cu2+, and 6.00 mg/g and 99.9% for Pb2+, respectively.
【CateGory Index】： X703