Membrane fouling reduction through electrochemically regulating flocs aggregation in an electro-coagulation membrane reactor

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Membrane fouling reduction through electrochemically regulating flocs aggregation in an electro-coagulation membrane reactor
	Zhao, Kai ; Sun, Jingqiu ; Hu, Chengzhi ; Qu, Jiuhui
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2019-09-01
卷号	83 页码:144-151
关键词	Electrocoagulation Ultrafiltration Membrane fouling Electric field Cake layer
ISSN号	1001-0742
英文摘要	Coupling coagulation and applied electric field is an efficient method to regulate cake layer porosity and hydrophilicity for alleviating ultrafiltration membrane (UF) fouling. However, the Al/Fe flocs aggregation behavior are induced from electric field and determine the cake layer structure, which has not been studied comparatively yet. Herein, the anti-fouling performance in an efficient electro-coagulation membrane reactor (ECMR, in which UF membrane modules are placed between electrodes) was investigated with Al/Fe anode and various electrochemical parameters from the viewpoint of regulating flocs aggregation. Both the cake layers formed from Al and Fe flocs under an electric field were more porous and hydrophilic in comparison with that formed without electric fields, resulting in an enhanced water flux under higher electric field strength. Comparing with Fe flocs, Al flocs had a faster growth rate and larger size, facilitating membrane pore block resistant, which was more pronounced in a higher current density. Furthermore, the cake layer formed from Al flocs was more porous than that formed from Fe flocs. Therefore, the anti-fouling performance of ECMR with Al anode was superior to that of ECMR with Fe anode. When the electric field strength increased from 0 to 10 V/cm, the normalized specific flux was improved from 71.2% to 89.4% for ECMR (Al) and from 48.1% to 70.1% for ECMR (Fe) at 30 min. (c) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42660]
专题	生态环境研究中心_环境水质学国家重点实验室
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Kai,Sun, Jingqiu,Hu, Chengzhi,et al. Membrane fouling reduction through electrochemically regulating flocs aggregation in an electro-coagulation membrane reactor[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2019,83:144-151.
APA	Zhao, Kai,Sun, Jingqiu,Hu, Chengzhi,&Qu, Jiuhui.(2019).Membrane fouling reduction through electrochemically regulating flocs aggregation in an electro-coagulation membrane reactor.JOURNAL OF ENVIRONMENTAL SCIENCES,83,144-151.
MLA	Zhao, Kai,et al."Membrane fouling reduction through electrochemically regulating flocs aggregation in an electro-coagulation membrane reactor".JOURNAL OF ENVIRONMENTAL SCIENCES 83(2019):144-151.