DOI: 10.1016/j.watres.2018.12.067
Scopus记录号: 2-s2.0-85060308281
论文题名: Polyamidoamine dendrimer grafted forward osmosis membrane with superior ammonia selectivity and robust antifouling capacity for domestic wastewater concentration
作者: Bao X. ; Wu Q. ; Shi W. ; Wang W. ; Yu H. ; Zhu Z. ; Zhang X. ; Zhang Z. ; Zhang R. ; Cui F.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 1
结束页码: 10
语种: 英语
英文关键词: Ammonia selectivity
; Antifouling capacity
; Domestic wastewater concentration
; Forward osmosis
; Polyamidoamine dendrimer
Scopus关键词: Ammonia
; Chlorine compounds
; Contact angle
; Dendrimers
; Electrostatics
; Grafting (chemical)
; Hydrophilicity
; Metal ions
; Metals
; Molecules
; Protonation
; Surface diffusion
; Wastewater treatment
; Antifouling
; Domestic wastewater
; Electrostatic attractions
; Electrostatic repulsion
; Forward osmosis
; Forward osmosis membrane
; Forward osmosis membranes
; Polyamidoamine dendrimers
; Membranes
; antifouling agent
; dendrimer
; polyamidoamine
; ammonia
; ammonium compound
; antifouling
; composite
; concentration (composition)
; membrane
; polymer
; wastewater
; wastewater treatment
; aqueous solution
; Article
; chemical structure
; contact angle
; controlled study
; covalent bond
; hydrophilicity
; isoelectric point
; osmosis
; pH
; phase separation
; priority journal
; sulfonation
; surface property
; waste water
; waste water management
; water permeability
; zeta potential
英文摘要: Developing a forward osmosis (FO) membrane with superior ammonia selectivity and robust antifouling performance is important for treating domestic wastewater (DW) but challenging due to the similar polarities and hydraulic radii of NH 4 + and water molecules. Herein, we investigated the feasibility of using polyamidoamine (PAMAM) dendrimer to simultaneously enhance the ammonia rejection rate and antifouling capacity of the thin-film composite (TFC) FO membrane. PAMAM dendrimer with abundant, easily-protonated, terminal amine groups was grafted on TFC-FO membrane surface via covalent bonds, which inspired the TFC-FO membrane surface with appreciable Zeta potential (isoelectric point: pH = 5.5) and outstanding hydrophilicity (water contact angle: 39.83 ± 0.57°). Benefiting from the electrostatic repulsion between the protonated amine layer and NH 4 + -N as well as the concentration-induced diffusion resistance, the introduction of PAMAM dendrimer endowed the grafted membrane with a superior NH 4 + -N rejection rate of 98.23% and a significantly reduced the reverse solute flux when using NH 4 Cl solutions as feed solution. Meanwhile, the perfect balance between the electrostatic repulsion to positively-charged micromoleculer ions (metal ions and NH 4 + -N) and the electrostatic attraction to negatively-charged macromolecular organic foulants together with the hydrophilic nature of amine groups facilitated the enhancement of the grafted membranes in antifouling capacity and hence the NH 4 + -N selectivity (rejection rate of 91.81%) during the concentration of raw DW. The overall approach of this work opens up a frontier for preparation of ammonia-selective and antifouling TFC-FO membrane. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122000
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Urban Water Resource and Environment, School of Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China; College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400044, China
Recommended Citation:
Bao X.,Wu Q.,Shi W.,et al. Polyamidoamine dendrimer grafted forward osmosis membrane with superior ammonia selectivity and robust antifouling capacity for domestic wastewater concentration[J]. Water Research,2019-01-01