Y分子筛颗粒负载纳米铁同步去除水中Cu(Ⅱ)和Cr(Ⅵ)的性能及机理  

Simultaneous Removal of Cu(Ⅱ)and Cr(Ⅵ)Using Nano Iron Loading on Granular Y Molecular Sieve from Aqueous Solution:Performance and Mechanism

作　　者：程顺 刘红[1,2] 张靖[1,2] 范先媛[1,2] CHENG Shun;LIU Hongh;ZHANG Jing;FAN Xianyuan(College of Resource and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan University ofScience and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学资源与环境工程学院,武汉430081 [2]武汉科技大学,冶金矿产资源高效利用与造块湖北省重点实验室,武汉4300813

出　　处：《硅酸盐学报》2022年第1期244-253,共10页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目(41230638);湖北省环保厅科研项目(2017HB08)。

摘　　要：以具备阳离子交换性能的Y分子筛颗粒为载体,设计合成了Y分子筛颗粒负载纳米铁材料,用于同步去除水中Cu(Ⅱ)和Cr(Ⅵ)污染。结果表明:Y分子筛颗粒负载纳米铁后,对Cu(Ⅱ)-Cr(Ⅵ)体系中Cu(Ⅱ)的吸附量由46.6 mg/g提升至67.6 mg/g,并具备去除Cr(Ⅵ)的能力(13.2 mg/g)。溶液中共存的Cu(Ⅱ)会显著促进负载材料对Cr(Ⅵ)的去除。负载材料对Cu(Ⅱ)的去除机理包括Y分子筛的阳离子交换作用和零价铁的还原作用,Cr(Ⅵ)的去除主要归结于零价铁的还原作用,同时Cu(Ⅱ)的还原产物可促进负载材料对Cr(Ⅵ)的去除。Granular Y molecular sieve loaded with iron nanoparticles with cation exchange performance was synthesized for simultaneous removal of Cu(Ⅱ)and Cr(Ⅵ)from aqueous solution.The results show that the adsorption capacity of Cu(Ⅱ)increases from 46.6 mg/g to 67.6 mg/g,and the adsorption capacity of Cr(Ⅵ)is 13.2 mg/g when using granular Y molecular sieve loaded with iron nanoparticles.The removal of Cr(Ⅵ)by the loaded material is improved due to the coexistence of Cu(Ⅱ).The removal mechanism of Cu(Ⅱ)by the loaded material involves the cation exchange of Y molecular sieve and the reduction of Fe(0).The removal of Cr(Ⅵ)is mainly attributed to the reduction of Fe(0),and the reductive products of Cu(Ⅱ)can promote the removal of Cr(Ⅵ)by the loaded material.

关 键 词：分子筛 纳米铁 吸附 阳离子交换 金属离子 

分 类 号：X703[环境科学与工程—环境工程]