聚苯乙烯-L-半胱氨酸树脂的合成及其对Pb^(2+)、Hg^(2+)的吸附研究

Synthesis and Its Adsorption Properties for Pb^(2+)、Hg^(2+) in Solution on Polystyrene Supported L-cysteine

氯甲基聚苯乙烯微球与L-半胱氨酸(L-Cys)胺解反应合成聚苯乙烯-L-半胱氨酸树脂,通过红外光谱表征了树脂结构,测定了其树脂的比表面和孔结构等数据,研究了该树脂在不同温度下对Pb^(2+)、Hg^(2+)的吸附等温线,利用热力学函数关系计算出了吸附焓、自由能和熵。结果表明其合成的Cys树脂对水溶液中Pb^(2+)、Hg^(2+)离子有较好的吸附性能。

A novel polystyrene microsphere supported L-Cys was synthesized via the the amination reaction of L- eysteine with chloromethylated polystyrene （CMHCPS）. The obtained resin was characterized by Fourier transformation infrared speetra. The surface area and pore structure of the resin were determined. The adsorption isotherms of Pb^2＋ ,Hg^2＋ in solution at different temperatures were studied.Isothermal adsorption enthalpy, Gibbs free energy and entropy were calculated according to thermodynamic equations. The results showed that the polymer microsphere had strong adsorption to Pb^2＋,Hg^2＋ in solution.