DOI: 10.1016/j.watres.2017.12.072
Scopus记录号: 2-s2.0-85040023626
论文题名: Trace organic contaminant rejection by aquaporin forward osmosis membrane: Transport mechanisms and membrane stability
作者: Xie M. ; Luo W. ; Guo H. ; Nghiem L.D. ; Tang C.Y. ; Gray S.R.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 132 起始页码: 90
结束页码: 98
语种: 英语
英文关键词: Aquaporin membrane
; Forward osmosis
; Membrane stability
; Trace organic contaminant
; Transport mechanism
Scopus关键词: Diffusion
; Ethanol
; Heat treatment
; Impurities
; Organic solvents
; Pore size
; Stability
; Surface chemistry
; Thermodynamic stability
; Aquaporins
; Forward osmosis
; Membrane stability
; Trace organic contaminants
; Transport mechanism
; Membranes
; alcohol
; aquaporin
; aquaporin
; composite
; diffusion
; ethanol
; lipid
; membrane
; organic pollutant
; osmosis
; pollutant transport
; pore space
; solute transport
; solvent
; trace element
; Article
; controlled study
; heat treatment
; membrane structure
; membrane transport
; molecular size
; molecular weight
; osmosis
; priority journal
; provocation test
; solute
; solution and solubility
; static electricity
; stereospecificity
; surface property
; thermostability
; artificial membrane
; devices
; osmosis
; water management
; Aquaporins
; Membranes, Artificial
; Osmosis
; Static Electricity
; Water Purification
英文摘要: We investigated transport mechanisms of trace organic contaminants (TrOCs) through aquaporin thin-film composite forward osmosis (FO) membrane, and membrane stability under extreme conditions with respect to TrOC rejections. Morphology and surface chemistry of the aquaporin membrane were characterised to identify the incorporation of aquaporin vesicles into membrane active layer. Pore hindrance model was used to estimate aquaporin membrane pore size as well as to describe TrOC transport. TrOC transport mechanisms were revealed by varying concentration and type of draw solutions. Experimental results showed that mechanism of TrOC transport through aquaporin-embedded FO membrane was dominated by solution-diffusion mechanism. Non-ionic TrOC rejections were molecular-weight dependent, suggesting steric hindrance mechanisms. On the other hand, ionic TrOC rejections were less sensitive to molecular size, indicating electrostatic interaction. TrOC transport through aquaporin membrane was also subjected to retarded forward diffusion where reverse draw solute flux could hinder the forward diffusion of feed TrOC solutes, reducing their permeation through the FO membrane. Aquaporin membrane stability was demonstrated by either heat treatment or ethanol solvent challenges. Thermal stability of the aquaporin membrane was manifested as a relatively unchanged TrOC rejection before and after the heat treatment challenge test. By contrast, ethanol solvent challenge resulted in a decrease in TrOC rejection, which was evident by the disappearance of the lipid tail of the aquaporin vesicles from infrared spectrum and a notable decrease in the membrane pore size. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112989
Appears in Collections: 气候减缓与适应
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作者单位: Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, PO Box 14428, Melbourne, Victoria 8001, Australia; Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China; Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong; Strategic Water Infrastructure Laboratory, School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
Recommended Citation:
Xie M.,Luo W.,Guo H.,et al. Trace organic contaminant rejection by aquaporin forward osmosis membrane: Transport mechanisms and membrane stability[J]. Water Research,2018-01-01,132