Recycling of waste printed circuit boards into ion exchange resin

被引：6
|
作者：
Zhang, Jianqiu [1 ]
Tian, Tao [1 ]
Chen, Jinyang [1 ]
Zu, Jianhua [2 ]
Wang, Yangjun [1 ]
机构：
[1] Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai 200240, Peoples R China
来源：
RSC ADVANCES | 2015年 / 5卷 / 03期
基金：
中国国家自然科学基金;
关键词：
POLY(METHYL METHACRYLATE); AQUEOUS-SOLUTIONS; SULFONATION; DEGRADATION; ADSORPTION; MEMBRANES; TG/DTA/MS;
D O I：
10.1039/c4ra12094a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Recycling the nonmetal components of waste printed circuit boards (WPCBs), mainly thermosetting epoxy resins (TEPRs), is quite difficult because they are insoluble and inflexible. We report a new method to convert TEPRs into ion exchange resin by treatment with sulphuric acid and the equilibrium ion exchange capacity (IEC) of the produced sample is 1.63 meq g(-1). FTIR indicated that TEPRs were modified by sulphuric acid and X-ray photoelectron spectroscopy (XPS) verified that sulfonic acid group (-SO3-) was introduced. The produced ion exchange resin was stable up to 200 degrees C by TG-DTG analysis. The maximum adsorption capacities for Cu(II) and Ca(II) were 23.30 and 56.27 mg g(-1), respectively. The Langmuir model gave a better fit for adsorption than the Freundlich model. The activation energies (E-a) were 21.18 and 48.53 kJ mol(-1) for Cu(II) and Ca(II), respectively, with pseudo-second-order kinetics.
引用
收藏
页码：2080 / 2087
页数：8
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