泥炭吸附水中Pb^(2+)的研究

Study on the Adsorption of Pb^(2+) by Peat in Wastewater

试验研究了泥炭对Pb2+的等温吸附特征,并探讨了泥炭的质量浓度,pH值,共存Cu2+对其吸附Pb2+性能的影响。结果表明:其吸附特征符合Freund lich等温吸附;泥炭对Pb2+及存在Cu2+干扰时吸附的最佳pH分别为5,6;最大吸附容量分别为59.41 mg/g,76.38 mg/g,且存在Cu2+干扰时,泥炭对Pb2+的吸附率始终较只存在Pb2+时大,当泥炭量为12 g时,吸附率分别为95.2%、93.5%,说明Cu2+的存在促进了泥炭对Pb2+的吸附。

Adsorption isotherm property of Pb^2＋ by peat was studied,and the effect of the concentration of absorbentmass,value of pH,and Cu^2＋ coexisted on absorbent properties were investigated.The results indicate that,the adsorption fit for Freundlich isotherm,the best effect of adsorption of Pb^2＋ and with Cu^2＋ coexisted was at the pH value of 5and 6 respectively,and the adsorption capacity was 59.41 mg/g,76.38 mg/g respectively;with Cu^2＋ coexisted the effect of adsorption by peat was always higher,and the effect of eli minating was 95.2%,93.5% separately.When the concentration of absorbentmass was 12.0 g/l,which show that Cu^2＋ coexisted facilitated the adsorption of Pb^2＋ by peat.