Hierarchically Active Poly(vinylidene fluoride) Membrane Fabricated by In Situ Generated Zero-Valent Iron for Fouling Reduction

doi:10.1021/acsami.9b22147

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	Hierarchically Active Poly(vinylidene fluoride) Membrane Fabricated by In Situ Generated Zero-Valent Iron for Fouling Reduction
	He, Zijun ; Mahmud, Sakil ; Zhao, Shuaifei ; Yang, Yang ; Zhu, Lijing ; Zhao, Yubao ; Zeng, Qingyi ; Xiong, Zhu ; Hu, Chun
刊名	ACS APPLIED MATERIALS & INTERFACES
	2020
卷号	12 期号:9 页码:10993-11004
关键词	FENTON-CATALYTIC EFFICIENCY HOLLOW-FIBER MEMBRANES SODIUM-HYPOCHLORITE WATER-TREATMENT NANOFILTRATION MEMBRANES SURFACE NANOPARTICLES DEGRADATION PERFORMANCE FILTRATION
DOI	10.1021/acsami.9b22147
英文摘要	Sodium hypochlorite (NaClO) solution is a typical cleaning agent for membrane fouling. However, it can damage membrane chemical structures and produce toxic disinfection byproducts, which in turn reduces the membrane performance. This study focuses on the fabrication of active membranes thereby overcoming the limitations of chemical cleaning. A hierarchical active poly(vinylidene fluoride) membrane with polydopamine/polyethyleneimine (PEI) co-supported iron nanoparticle (Fe NP) catalysts was successfully constructed and denoted as a Fe-HP-membrane. The Fe-HP-membrane exhibited excellent advanced oxidation activity with maximum flux recoveries (similar to 85% with bovine serum albumin [BSA] and similar to 95% with humic acid [HA] solutions). After the static experiment of similar to 30 days, the BSA proteins and HA successfully desorbed from the membrane surface. Especially, with a trace amount of hydrogen peroxide (H2O2) flowing over the surface of the Fe-HP-membrane, highly exposed active Membrane cleaning showed that the "outside-to-in" active surfaces generated considerable amounts of (OH)-O-center dot radicals at the interface of BSA or HA and the fouled membrane. As a result, the unwanted foulants were successfully removed from the membrane interface, enabling multiple use of the Fe-HP-membrane. Therefore, backwashing with a small amount of H2O2 (0.33 wt %) covered similar to 20% of the flux. In contrary, backwashing with NaClO (1 wt %) can only achieve a flux recovery of similar to 10% after six consecutive BSA filtration cycles. The Fe-HP-membrane exhibited better HA foulant removal (a flux recovery of similar to 51%) after backwashing with H2O2 than using NaClO (a flux recovery of similar to 43%). Our findings demonstrate a new platform for water treatment and regeneration of fouled membranes.
学科主题	Science & Technology - Other Topics ; Materials Science
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/19891]
专题	2020专题
作者单位	1.Xiong, Z (corresponding author), Guangzhou Univ, Minist Educ, Key Lab Water Qual & Conservat Pearl River Delta, Guangzhou 510006, Guangdong, Peoples R China. 2.Xiong, Z (corresponding author), Guangzhou Univ, Minist Educ, Inst Environm Res Greater Bay, Guangzhou 510006, Guangdong, Peoples R China.
推荐引用方式 GB/T 7714	He, Zijun,Mahmud, Sakil,Zhao, Shuaifei,et al. Hierarchically Active Poly(vinylidene fluoride) Membrane Fabricated by In Situ Generated Zero-Valent Iron for Fouling Reduction[J]. ACS APPLIED MATERIALS & INTERFACES,2020,12(9):10993-11004.
APA	He, Zijun.,Mahmud, Sakil.,Zhao, Shuaifei.,Yang, Yang.,Zhu, Lijing.,...&Hu, Chun.(2020).Hierarchically Active Poly(vinylidene fluoride) Membrane Fabricated by In Situ Generated Zero-Valent Iron for Fouling Reduction.ACS APPLIED MATERIALS & INTERFACES,12(9),10993-11004.
MLA	He, Zijun,et al."Hierarchically Active Poly(vinylidene fluoride) Membrane Fabricated by In Situ Generated Zero-Valent Iron for Fouling Reduction".ACS APPLIED MATERIALS & INTERFACES 12.9(2020):10993-11004.