Recycling of waste printed circuit boards into ion exchange resin
Recycling of waste printed circuit boards into ion exchange resin
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DOI：
10.1039/c4ra12094a
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发表时间：
2015
期刊：
影响因子：
3.9
通讯作者：
Jianqiu Zhang;Tao Tian;Jinyang Chen;J. Zu;Yangjun Wang
中科院分区：
文献类型：
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作者：
Jianqiu Zhang;Tao Tian;Jinyang Chen;J. Zu;Yangjun Wang
回收废旧印刷电路板（wpcb）的非金属成分，主要是热固性环氧树脂（tepr），是相当困难的，因为它们是不溶的和不灵活的。我们报道了一种用硫酸处理将tepr转化为离子交换树脂的新方法，所得样品的平衡离子交换容量（IEC）为1.63 meq g−1。FTIR表明tepr被硫酸修饰，x射线光电子能谱（XPS）证实了引入了磺酸基团（-SO3−）。经TG-DTG分析，制备的离子交换树脂在200℃下稳定。对Cu（II）和Ca（II）的最大吸附量分别为23.30 mg g−1和56.27 mg g−1。Langmuir模型比Freundlich模型更适合于吸附。Cu（II）和Ca（II）的活化能Ea分别为21.18和48.53 kJ mol−1，具有准二级动力学。
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 °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 (Ea) were 21.18 and 48.53 kJ mol−1 for Cu(II) and Ca(II), respectively, with pseudo-second-order kinetics.