Recycling of Mud Derived from Backwash Wastewater Coagulation as Magnetic Sodalite Sphere for Zn^(2+) Adsorption  

作　　者：Suiyi Zhu Manhong Ji Hongbin Yu Zhan Qu Jiakuan Yang Mingxin Huo Yi Wang 

机构地区：[1]School of Environment,Northeast Normal University,Changchun,130024,China [2]School of Environmental Science&Engineering,Huazhong University of Science and Technology,Wuhan,430074,China

出　　处：《Journal of Renewable Materials》2021年第9期1599-1607,共9页可再生材料杂志（英文）

基　　金：This work was supported by the National Key Research and Development Program of China(Grant No.2019YFE0117900);the National Natural Science Foundation of China(Grant Nos.52070038 and 51878134);the Science and Technology Program of Jilin Province(Grant No.20190303001SF).

摘　　要：Herein,we reported a method to prepare magnetic sodalite sphere by using the mud from backwash wastewater after polyaluminum chloride(PAC)coagulation.The results showed that approximately 100%of Fe in the wastewater was precipitated as flocculent iron mud(FM)by adding PAC.FM was converted to spherical magnetic sodalite(FMP)with a diameter of 3μm via a facile alkali hydrothermal method without adding Al/Si resources or reductant.The product FMP had the saturated magnetization of 10.9 emu g^(-1) and high Zn^(2+)adsorption capacity of 50.6 mg g^(-1).Without coagulation with PAC,the removal rate of Fe from the wastewater was only 92.7%,and the precipitated mud(RM)was converted to irregular particles(RMP),which had weak magnetic response and low capacity of Zn^(2+)adsorption comparing with FMP.With the method,the Fe in backwash wastewater was effectively recycled,and the generated sludge was converted to well-formed sodalite sphere without generating any secondary waste.

关 键 词：Backwash wastewater COAGULATION magnetic sodalite Mössbauer ADSORPTION 

分 类 号：X70[环境科学与工程—环境工程]