Zhang Bing, Wang Shixing, Fu Likang, Zhang Libo
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, Yunnan, China.
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China.
Polymers (Basel). 2018 Apr 14;10(4):437. doi: 10.3390/polym10040437.
A new adsorbent was prepared via modified poly(glycidyl methacrylate) with 8-aminoquinoline (AQ-PGMA) for the recovery of Pd(II) from solution. The practical application values of AQ-PGMA, including efficiency, selectivity and reusability for the recovery of Pd(II), are proved by the various experiment parameters. The parameters include HCl concentration, adsorption time, initial Pd(II) concentration, coexisting ions and reused cycles. The prepared AQ-PGMA showed a high adsorbing capacity for Pd(II) (up to 267.90 mg/g) when the concentration of HCl is higher than 0.4 mol/L. The analysis of the adsorption process indicated that the adsorption kinetics followed a pseudo-second-order kinetic model and the adsorption isotherms obeyed the Hill model. The Hill model showed that one adsorption site on the AQ-PGMA could combine 1.45 Pd(II). In addition, the obtained adsorbent demonstrated good regenerative ability and satisfying selectivity for the recovery of Pd(II). The adsorption mechanism was dominated by the chelation and ion exchange reactions between amines/hydroxyl groups and Pd(II). The experiments confirmed that AQ-PGMA was efficient for recovery of Pd(II) from highly acidic aqueous solutions.
通过用8-氨基喹啉改性聚甲基丙烯酸缩水甘油酯（AQ-PGMA）制备了一种新型吸附剂，用于从溶液中回收钯（II）。各种实验参数证明了AQ-PGMA在回收钯（II）方面的实际应用价值，包括效率、选择性和可重复使用性。这些参数包括盐酸浓度、吸附时间、初始钯（II）浓度、共存离子和重复使用次数。当盐酸浓度高于0.4 mol/L时，制备的AQ-PGMA对钯（II）表现出高吸附容量（高达267.90 mg/g）。吸附过程分析表明，吸附动力学遵循准二级动力学模型，吸附等温线符合希尔模型。希尔模型表明，AQ-PGMA上的一个吸附位点可以结合1.45个钯（II）。此外，所获得的吸附剂对钯（II）的回收表现出良好的再生能力和令人满意的选择性。吸附机制主要由胺基/羟基与钯（II）之间的螯合和离子交换反应主导。实验证实，AQ-PGMA对于从高酸性水溶液中回收钯（II）是有效的。
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