Synthesis and characterization of PVP/AAc copolymer hydrogel and its applications in the removal of heavy metals from aqueous solution
Synthesis and characterization of PVP/AAc copolymer hydrogel and its applications in the removal of heavy metals from aqueous solution
复制标题
DOI：
10.1016/s0014-3057(03)00150-2
复制
发表时间：
2003-12-01
影响因子：
6
通讯作者：
Hegazy, EA
中科院分区：
文献类型：
--
作者：
Ali, AEH;Shawky, HA;Hegazy, EA
采用辐射诱导共聚法制备了聚乙烯吡咯烷酮/丙烯酸（PVP/AAc）螯合共聚物水凝胶。研究了水凝胶中PVP含量和辐照剂量等制备参数对水凝胶溶胀行为的影响。考察了pH依赖性溶胀。用热重分析仪对制备的水凝胶和金属螯合水凝胶的热稳定性进行了表征。采用间歇平衡技术考察了PVP/AAc螯合水凝胶对水溶液中Fe（III）、Cu（II）、Mn（II）的去除效果。研究了处理时间、pH和初始进料浓度对金属离子去除率的影响。结果表明：金属离子的脱除顺序为：Fe(III) > Cu(II) > Mn（II）。金属离子的去除率随处理时间和培养基pH值的增加而增加。为了重复利用水凝胶，用2n HCl剥离金属离子。(C) 2003 Elsevier Ltd.版权所有。
Chelating poly(vinylpyrrolidone/acrylic acid) (PVP/AAc) copolymer hydrogels were prepared by radiation-induced copolymerization. The effects of preparation parameters such as PVP content in the hydrogel and irradiation dose,on the swelling behavior of the hydrogel were studied. The pH dependent swelling was investigated. The thermal stability of the prepared hydrogel and the metal chelated ones was characterized by TGA. The removal of Fe(III), Cu(II), and Mn(II) from aqueous solution by the prepared PVP/AAc chelating hydrogel was examined by batch equilibration technique. The influence of treatment time, pH, and the initial feed concentration on the amount of the metal ions removed was studied. The results show that the removal of the metal ion followed the following order: Fe(III) > Cu(II) > Mn(II). The amounts of the removed metal ions increased with treatment time and pH of the medium. To re-use the hydrogel, the metal ions were stripped by using 2 N HCl. (C) 2003 Elsevier Ltd. All rights reserved.