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Pb^(2+)的动力学特性  

One Step Co-deposited ZSM-5/PANI/PSS Electroactive Film and Its Kinetics Characteristics of Electrochemical Control Selective Separation for Pb^(2+) Ions

作　　者：乔文磊 杜晓 高凤凤[1] 郑君兰 李莎莎[1] 郝晓刚 QIAO Wen-lei;DU Xiao;GAO Feng-feng;ZHENG Jun-lan;LI Sha-sha;HAO Xiao-gang(Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China;Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, Nanjing University of Science and Technology, Nanjing 210094, China)

机构地区：[1]太原理工大学化学工程系,山西太原030024 [2]南京理工大学化工污染控制与资源化江苏省高校重点实验室,江苏南京210094

出　　处：《电化学》2018年第2期143-153,共11页Journal of Electrochemistry

基　　金：国家自然科学基金项目(No.21776191;No.201706181;No.21478156);中央高校基本科研业务费专项资金(No.30916014102)资助

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Pb^(2+)具有优良的选择分离性能,在10 mg·L-1的Pb^(2+)溶液中电控离子交换法对Pb^(2+)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Pb^(2+)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.A novel electroactive composite film consisting of ZSM-5/polyaniline/polystyrene sulfonate（ZSM-5/PANI/PSS） was prepared by double pulse one step co-deposition method. The ZSM-5/PANI/PSS composite film was characterized by FT-IR, SEM,XRD, and XPS techniques. The highly crystallized nano-ZSM-5 was synthesized by hydrothermal method, which could be evenly dispersed in aqueous solution by ultrasonic treatment. The synthesis condition of composite film was optimized through changing the p H value of solution. The ZSM-5/PANI/PSS composite film showed higher adsorption capacity for Pb^（2＋）ions. Langmuir model was applied to analyze the adsorption process. The adsorption capacity of composite film for Pb^（2＋）ions was 235 mg·g^（-1）. The adsorption kinetics of Pb^（2＋）ions could be described properly by the pseudo-first-order kinetic mode. Furthermore, the pseudo-first-order rate constant was determined to be 0.0227 g·mg^（-1）·min^（-1） in ESIX process, which is higher than that of 0.0117 g·mg^（-1）·min^（-1） in IX process. Therefore, the ZSM-5/PANI/PSS composite film is expected to be a promising material in the field of waste treatment.

关 键 词：电控离子交换 ZSM-5/PANI/PSS 吸附选择性 PB^2+ 吸附动力学 

分 类 号：O646[理学—物理化学]