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- 2018
一步共沉积法制备ZSM-5/PANI/PSS电活性膜及其电控选择性分离重金属Pb2+的动力学特性
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Abstract:
摘要 本文采用双脉冲一步共沉积法制备了ZSM-5/聚苯胺/聚苯乙烯磺酸钠(ZSM-5/PANI/PSS)电活性膜，通过FT-IR、XRD和SEM对ZSM-5/PANI/PSS电活性膜进行了表征. 由水热法合成纳米级ZSM-5颗粒，经超声处理将ZSM-5分散，有利于合成均匀的ZSM-5/PANI/PSS电活性膜. 实验结果表明该电活性膜对Pb2+具有优良的选择分离性能，在10 mg﹒L-1的Pb2+溶液中电控离子交换法对Pb2+的去除率是传统离子交换法的2.3倍，且前者的平衡吸附量是后者的2.5倍. 吸附过程满足Langmuir等温吸附方程，ZSM-5/PANI/PSS电活性膜对Pb2+的交换量高达235 mg·g-1. 吸附过程为准一级动力学吸附，电控离子交换过程的准一级吸附速率常数(0.0227 g·mg-1·min-1)明显高于传统离子交换(0.0117 g·mg-1·min-1). 该电活性膜在电控离子交换处理废水领域具有很好的应用前景
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