Particles and porous tablets based on Fe^0/ZSM-5 composites prepared by ball-milling for heavy metals removal: Dissolved Fe^(2+), pH, and mechanism

作     者：Chunfeng Wang Dan Yao Yang Liu Yanchen Zhu Guanfei Chen Jianxin Zhu 

作者机构：Henan Key Laboratory for Environmental Pollution Control and Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control Ministry of Education School of Environment Henan Normal University Research Center for Eco-Environmental Sciences Chinese Academy of Sciences 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2018年第30卷第10期

页      面：33-42页

核心收录：

学科分类：1007[医学-药学(可授医学、理学学位)] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 10[医学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.51378180 21677162) 

主　　题：Fe0 microparticles Ball-milling ZSM-5 Heavy metal Removal 

摘      要：Novel, low-cost Fe0/ZSM-5-based particles and porous tablets were prepared by a ballmilling method and used for the removal of Pb^2＋ in solution. Solid-phase characterization by scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy（SEMEDS） and transmission electron microscopy（TEM） revealed that the Fe0 microparticles were evenly loaded and tightly immobilized on the surface of ZSM-5 because of the extrusion/welding impact during ball-milling. For different Pb2＋ concentrations, batch experiments indicated that the removal of Pb2＋ increased with the decline of dissolved Fe2＋and p H value in the solution for particles; opposite results were obtained for the tablets. The differences in the contact between both materials and Pb2＋ were the main factor controlling Pb2＋ removal in the solution. Investigation into the effect of initial pH value revealed that high pH reduced the number of electrons released from Fe corrosion. Consequently, low levels of removed Pb2＋ and dissolved Fe2＋ were synchronously observed. Also, simulated electroplating wastewater was treated using the prepared particles and porous tablets,and the removal order of Pb^2＋ 〉 Cr6^＋〉 Cu^2＋≈ Cd^2＋ was observed. The Fe0/ZSM-5 particles and tablets prepared through ball-milling show potential as materials for treatment of Pb2＋ and other toxic metals.