聚甲基丙烯酸修饰壳聚糖微球的制备及其对Zn²⁺和Cu²⁺的吸附

聚甲基丙烯酸修饰壳聚糖微球的制备及其对Zn 2+ 和Cu 2+ 的吸附 Preparation of Chitosan Microspheres Grafted by Poly（Methacrylic Acid） and Its Adsorption Behavior of Zn 2+ and Cu 2+ 金惠 JIN Hui1 1 first-author 孙小梅 SUN Xiaomei1 1 邢云 XING Yun2 2 李步海 LI Buhai1 1 2 中南民族大学化学与材料科学学院/分析化学国家民委重点实验室 中南民族大学化学与材料科学学院/分析化学国家民委重点实验室 College of Chemistry and Materials Science,South-Central University for Nationalities/ Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission College of Chemistry and Materials Science,South-Central University for Nationalities/ Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission 武汉大学化学与分子科学学院 武汉大学化学与分子科学学院 College of Chemistry and Molecular Sciences,Wuhan University College of Chemistry and Molecular Sciences,Wuhan University 以过硫酸钾为引发剂,通过热引发聚合合成了聚甲基丙烯酸修饰壳聚糖微球（PMAA-GLA-CTS）.用红外光谱和X射线光电子能谱表征了产物的结构,并考察了它对水溶液中Zn2+和Cu2+的吸附行为.结果表明,其吸附等温线符合Langmuir方程;pH 4.0时,对Zn2+和Cu2+的最大吸附容量分别为99.1,67.8 mg/g.用二级吸附动力学模拟反应过程有很好的线性相关性,据此确定该吸附过程为化学吸附.以0.2 mol/L的HCl为解吸剂,Zn2+和Cu2+的二次再生率分别为98.0%和96.0%. The thermal initiation graft copolymerization of methacrylic acid onto chitosan was carried out in aqueous medium by using potassium persulfate as initiator.The structure of the mocrospheres was characterized by FT-IR and XPS,and the adsorption behavior of the modified microspheres for Zn2+ and Cu2+ was investigated.The equilibrium process conforms to the Langmuir isotherm.The maximum adsorption capacities for Zn2+ and Cu2+ are 99.1 mg/g and 67.8 mg/g at pH 4.0,respectively.The kinetic simulation shows good correlation coeffcients for pseudo-second-order kinetic model,confirming that the soption rate is controlled by chemical adsorption.The regeneration of the adsorbent can be carried out by treating the loaded microspheres with 0.2 mol/L HCl.The regeneration rate for Zn2+ and Cu2+ can be achieved to 98.0% and 96.0%,respectively. 壳聚糖微球 α-甲基丙烯酸 接枝共聚 吸附 chitosan α-methacrylic acid graft copolymerization adsorption 10.14188/j.1671-8836.2010.03.005 O645.16 国家民委院校科研基金资助项目（MJY00004） 2010-03-01 2021-04-01 3 56