马丙共聚物吸附剂的制备及吸附性能的ICP-AES法研究

以马来酸酐和丙烯酰胺为功能单体，N,N-亚甲基双丙烯酰胺为交联剂，过硫酸铵为引发剂合成了马来酸酐、丙烯酰胺共聚物吸附剂P(MA-AM)。用傅里叶变换红外光谱(FTIR)和热重分析对共聚物进行了表征，并采用电感耦合等离子体原子发射光谱(ICP-AES)法研究了共聚物的吸附性能和选择性;结果表明，在pH 3.5时，P(MA-AM)对Fe3+具有很高的选择性，1 h达吸附平衡，其饱和吸附量为78.81 mg·g-1;Fe3+的吸附过程符合准二级反应动力学模型，吸附模型可以用Freundlich等温吸附来描述，该吸附为吸热过程。

Synthesis of Maleic Anhydride-Acrylamide Copolymer and Study of Its Adsorption Properties by ICP-AES

A novel adsorbent was prepared with maleic anhydride and acrylamide as functional monomer, N,N-methylenebisacrylamide as cross-linking agent, and ammonium persulfate as initiator through aqueous polymerization reaction. The adsorbent was characterized by Fourier transmission infrared spectra (FTIR) and Thermogravimetry (TG). The adsorption properties and selectivity properties were investigated by inductively coupled plasma atomic emission spectrum (ICP-AES). The result indicated that the optimum acidity was pH 3.5 and the reaction attained equilibrium at 1 h under stirring. The polymer adsorbent exhibited high selectivity for Fe3+ and its saturated adsorption capacity was 78.81 mg·g-1. The adsorption kinetics was well described by pseudo-second kinetic equation, and the adsorption of the copolymer for Fe3+ accorded with Freundlich isothermal model. The adsorption process was found to be endothermic.