主链含双酚酸钠链节的聚芳醚砜对水中Pb^(2+)、Cu^(2+)、Cd^(2+)的同步吸附性能  

Synchronous adsorption properties of Pb^(2+),Cu^(2+)and Cd^(2+) by poly arylene ether sulfone containing diphenolic sodium linkage from aqueous solution

作　　者：武兴华[1] 马得旺[1] 王大鸷[1] 徐同宽[1] 张绍印[1] 

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2016年第3期190-194,共5页Journal of Dalian Polytechnic University

基　　金：辽宁省自然科学基金资助项目(201202012);住房和城乡建设部科学技术计划项目(2014-K4-034);辽宁省教育厅科学研究项目(L2011079)

摘　　要：利用主链含双酚酸钠链节的聚芳醚砜(PAES-C-Na)吸附剂处理同时含Pb^(2+)、Cu^(2+)、Cd^(2+)的水溶液,并通过火焰原子吸收分光光度计测试溶液中金属离子浓度;研究了溶液pH、吸附剂量、初始浓度以及吸附时间等因素对同步吸附的影响,且同步吸附行为采用伪一阶和伪二阶动力学方程进行模拟。结果表明,PAES-C-Na吸附共存金属离子主要是通过表面的羧基功能基团与金属离子之间的离子交换和静电作用实现,同步吸附动力学实验表明PAES-C-Na对金属离子的吸附采用伪二阶动力学方程拟合效果最好,即金属离子的同步吸附以化学吸附为速率控制步骤,其吸附量由大到小顺序为Pb^(2+)(26.02 mg/g)、Cu^(2+)(20.52mg/g)、Cd^(2+)(12.21mg/g)。Poly arylene ether sulfone containing diphenolic sodium linkage （PAES-C-Na） was used to remove Pb^2＋, Cu^2＋, Cd^2＋ from aqueous solution, and the effects of pH, adsorbent dosage, initial concentration and contact time were investigated. The adsorption process was. simulated by the pseudo-first-order and the pseudo-second-order equations. The adsorption of coexist metal ions onto PAES-C-Na mainly depended on combined actions of ion-exchange and electrostatic between metal ions and functional groups （carboxyl）. Kinetic analysis of synchronous adsorption indicated that the adsorption of metal ions onto PAES-C-Na fitted a pseudo-second-order model. The descending order of adsorption capacities was as follow. Pb^2＋（26.02 mg/g）, Cu^2＋ （20.52 mg/g）, Cd^2＋（12.21 rag/g）.

关 键 词：聚芳醚砜 吸附 金属离子 羧基 静电作用 

分 类 号：TQ319[化学工程—高聚物工业]