Preparation of Calcium Cross-linked Nano-Fe3O4 Modified Zeolite Microspheres for Cu^2+ Adsorption from Wastewater  

作　　者：WEI Junchong LONG Xuejun WANG Jia TANG Zheng WANG Tingting KANG Hanyu LIANG Shuang WEI Junchong;龙学军;王佳;TANG Zheng;WANG Tingting;KANG Hanyu;LIANG Shuang(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;School of Environmental Engineering,Wuhan Textile University,Engineering Research Centre for Clean Production of Textile Dyeing and Printing,Ministry of Education,Wuhan 430200,China;China Forum of Environmental Journalists,Shanxi 710000,China;Wuhan Radioactive and Dangerous Solid Waste Pollution Management Center,Wuhan 430015,China;School of Resource and Environmental Sciences,Wuhan University,Wuhan 430079,China)

机构地区：[1]School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China [2]School of Environmental Engineering,Wuhan Textile University,Engineering Research Centre for Clean Production of Textile Dyeing and Printing,Ministry of Education,Wuhan 430200,China [3]China Forum of Environmental Journalists,Shanxi 710000,China [4]Wuhan Radioactive and Dangerous Solid Waste Pollution Management Center,Wuhan 430015,China [5]School of Resource and Environmental Sciences,Wuhan University,Wuhan 430079,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2020年第6期1021-1030,共10页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Science Foundation of Hubei Province of China(2015CFB706)。

摘　　要：Artificial zeolite was modified by nano-Fe3O4 for development of functional adsorbents.Subsequently,adsorbents such as calcium cross-linked nano-Fe3O4 microspheres (Ca-MS),calcium cross-linked nano-Fe3O4 modified zeolite microspheres (Ca-MZS) and iron cross-linked nano-Fe3O4 modified zeolite microspheres (Fe-MZS) were prepared and compared for their adsorption performance.The effects of adsorbent dosage,solution pH,initial concentration and ion content on the removal of Cu^2+ from wastewater are investigated,and the adsorption kinetics and isotherms for the adsorbent materials were analyzed.The experimental results indicate that for the initial concentration of Cu^2+ of 30 mg/L,the adsorption is noted to be most stable.The optimal initial pH for adsorbing Cu^2+ is observed to be 5.5.At an optimal dosage of Ca-MZS of 900 mg/L,the adsorption capacity is measured to be 28.25 mg/g,along with the removal rate of 72.49%.The addition of Na+ and K+ affects the adsorption of Cu^2+.For the Na^+ and K^+ concentration of 0.2 mmol/L,the Cu^2+ removal rate by Ca-MZS drops to 11.94% and 22.12%,respectively.As compared with the adsorbents such as Natural Zeolite (NZ),Ca-MS and Fe-MZS,Ca-MZS demonstrates the best removal effect in solution,where the removal rate reaches 84.27%,with the maximum adsorption capacity of 28.09 mg/g.The Cu^2+ adsorption kinetics of Ca-MZS is observed to follow the Elovich kinetic model,with the adsorption isotherm data fitting the Freundlich isotherm model by using the non-linear method.

关 键 词：ADSORBENT modified zeolite CU^2+ NANO-FE3O4 MICROSPHERES 

分 类 号：X703[环境科学与工程—环境工程] TQ424[化学工程]