Application of heat-activated peroxydisulfate process for the chemical cleaning of fouled ultrafiltration membranes  

作　　者：Jiaqi Ding Haoliang Xiao Xiaolong Huang Yujia Zou Zhimin Ye Songlin Wang Pengchao Xie Yongsheng Chen Jun Ma 

机构地区：[1]Yangtze River Basin Ecological Environment Monitoring and Scientific Research Center,Yangtze River Basin Ecological Environment Supervision and Administration Bureau,Ministry of Ecological Environment,Wuhan 430010,China [2]School of Environmental Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China [3]Key Laboratory of Water&Wastewater Treatment(HUST),MOHURD,Wuhan 430074,China [4]School of Civil and Environmental Engineering,Georgia Institute of Technology,Atlanta,GA 30332,United States [5]State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China

出　　处：《Chinese Chemical Letters》2023年第10期116-120,共5页中国化学快报（英文版）

基　　金：supported by the Natural Science Foundation of China(Nos.52070081,51578258 and 51878308);the National Key Research and Development Program of China(No.2022YFC3203500)。

摘　　要：Na Cl O has been widely used to restore membrane flux in practical membrane cleaning processes,which would induce the formation of toxic halogenated byproducts.In this study,we proposed a novel heatactivated peroxydisulfate(heat/PDS)process to clean the membrane fouling derived from humic acid(HA).The results show that the combination of heat and PDS can achieve almost 100%recovery of permeate flux after soaking the HA-fouled membrane in 1 mmol/L PDS solution at 50℃ for 2 h,which is attributed to the changes of HA structure and enhanced detachment of foulants from membranes.The properties of different treated membranes are characterized by scanning electron microscopy(SEM),atomic force microscope(AFM),attenuated total reflection Fourier transform infrared spectroscopy(ATRFTIR),and X-ray photoelectron spectroscopy(XPS),demonstrating that the reversible and irreversible foulants could be effectively removed by heat/PDS cleaning.The filtration process and fouling mechanism of the cleaned membrane were close to that of the virgin membrane,illustrating the good reusability of the cleaned membrane.Additionally,heat/PDS which can avoid the generation of halogenated byproducts shows comparable performance to Na Cl O on membrane cleaning and high performance for the removal of fouling caused by sodium alginate(SA),HA-bovine serum albumin(BSA)-SA mixture and algae,further suggesting that heat/PDS would be a potential alternative for membrane cleaning in practical application.

关 键 词：Chemical cleaning PEROXYDISULFATE HEAT Membrane fouling ULTRAFILTRATION 

分 类 号：TQ051.893[化学工程]