泥炭对重金属废水中Cu^2＋、Pb^2＋最佳吸附条件的研究

泥炭中富含有机质与腐植酸，其中含有大量的极性基团，对金属离子有较强的吸附性能。本试验通过对泥炭吸附重金属废水中Cu^2＋、Pb^2＋种离子的吸附条件进行研究，得出最佳吸附条件为：当重金属离子浓度为30mg／L时，泥炭投加量分别为7g／L和5g／L，最佳吸附pH值分别为5和8，吸附时间均为30min．且离子浓度越高，表观吸附量越大，但除金属率越低。最佳条件下Cu^2＋、Pb^2＋的表观吸附量分别为4．24mg／g和6．00mg／g，除铜率和除铅率分别为98．8％和999％。

Study on Optimum Conditions of Peat Adsorbing Cu2+ and Pb2+ in Heavy Metal Water

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 Cu^2＋ and Pb^2＋ 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 Cu^2＋, and 6.00 mg/g and 99.9% for Pb^2＋, respectively.