Application of potassium ferrate combined with poly-aluminum chloride for mitigating ultrafiltration (UF) membrane fouling in secondary effluent: Comparison of oxidant dosing strategies

doi:10.1016/j.chemosphere.2021.129862

CORC > 兰州理工大学 > 兰州理工大学

	Application of potassium ferrate combined with poly-aluminum chloride for mitigating ultrafiltration (UF) membrane fouling in secondary effluent: Comparison of oxidant dosing strategies
	Chen, Zhiqiang 1,2; Yang, Boxuan 1; Wen, Qinxue 1; Tang, Yingcai 1
刊名	CHEMOSPHERE
	2021
卷号	274
关键词	Effluent organic matter (EfOM) Organic micropollutants (OMPs) Oxidation Coagulation Wastewater reclamation
ISSN号	0045-6535
DOI	10.1016/j.chemosphere.2021.129862
英文摘要	Coagulation has been widely applied as a pretreatment for ultrafiltration (UF) membrane in wastewater reclamation, however, it is unable to effectively ensure the removal of organic micropollutants (OMPs) and genotoxicity. To solve this problem, oxidant ferrate (VI) ((FeO42-)-O-VI, Fe-VI) was combined with coagulant poly-aluminum chloride (PAC) as the pretreatment of UF to treat secondary effluent, and three oxidant dosing strategies (namely oxidation followed by coagulation (O-Fe-VI-PAC), simultaneous oxidation and coagulation (SeFeVI-PAC), and coagulation followed by oxidation (C-PAC-Fe-VI)) were compared at two oxidant doses. The results showed that C-PAC-Fe-VI pretreatment exhibited the best performance for the removal of DOC (35.9%), UV254 (33.7%), protein (71.8%), and polysaccharide (22.1%). Molecular weight and fluorescence analysis revealed that the removed organics were mainly humic substances. Both the direct UF process and PAC pretreatment showed limited removal of OMPs and genotoxicity, however, the combined pretreatments of Fe-VI and PAC dramatically removed them. The maximum removal efficiency of the fourteen selected OMPs and genotoxicity was obtained under SeFeVI-PAC (59.6% on average) and C-PAC-Fe-VI (84.1%), respectively. With respect to membrane fouling control, the normalized flux reduction showed an apparent regularity of C-PAC-Fe-VI > OeFe(VI)-PAC > SeFeVI-PAC, however, Fe-VI dose should be carefully determined. The addition of Fe-VI delayed the transition of membrane fouling mechanism from pore blockage to cake filtration, especially in C-PAC-Fe-VI pretreatment, which was confirmed by the fluorescence characterization of hydraulic reversible and hydraulic irreversible foulants. To sum up, C-PAC-Fe-VI dosing strategy seems to have more potential in membrane fouling alleviation and effluent quality improvement. (C) 2021 Elsevier Ltd. All rights reserved.
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000642944800089
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148184]
专题	兰州理工大学
作者单位	1.Harbin Inst Technol SKLUWRE, State Key Lab Urban Water Resource & Environm, HIT, Harbin 150090, Peoples R China; 2.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730070, Peoples R China
推荐引用方式 GB/T 7714	Chen, Zhiqiang,Yang, Boxuan,Wen, Qinxue,et al. Application of potassium ferrate combined with poly-aluminum chloride for mitigating ultrafiltration (UF) membrane fouling in secondary effluent: Comparison of oxidant dosing strategies[J]. CHEMOSPHERE,2021,274.
APA	Chen, Zhiqiang,Yang, Boxuan,Wen, Qinxue,&Tang, Yingcai.(2021).Application of potassium ferrate combined with poly-aluminum chloride for mitigating ultrafiltration (UF) membrane fouling in secondary effluent: Comparison of oxidant dosing strategies.CHEMOSPHERE,274.
MLA	Chen, Zhiqiang,et al."Application of potassium ferrate combined with poly-aluminum chloride for mitigating ultrafiltration (UF) membrane fouling in secondary effluent: Comparison of oxidant dosing strategies".CHEMOSPHERE 274(2021).