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Effect of highly concentrated salt on retention of organic solutes by nanofiltration polymeric membranes
Luo, Jianquan1,2; Wan, Yinhua1; Wan, YH
2011-04-15
Source PublicationJOURNAL OF MEMBRANE SCIENCE
ISSN0376-7388
Volume372Issue:1-2Pages:145-153
AbstractDuring desalination of feed with highly concentrated salt by nanofiltration (NF), predictive modeling was difficult due to the effect of salt on retention of organic solutes. Consequently, a better understanding of salt effect on membrane and organic solutes was required. In this study, four well-known commercially available NF polymeric membranes, NF270, NF-, Desal-5 DL and Nanomax50, were analyzed by a model based on an extended Nernst-Planck equation, using highly concentrated glucose and sodium chloride (NaCl) solutions. The results showed that with increasing salt concentration, the solute-to-pore size ratio (lambda(i)) decreased while the ratio of effective membrane thickness to porosity (Delta x/epsilon) increased, indicating that the effect of salt may include decreasing solutes size, increasing membrane pore size, and increasing effective membrane thickness. Moreover, such salt effect appeared to be independent of membrane and solute types, and the correction model could well predict the retention of charged solutes at high salt concentration because electrostatic repulsion effect between charged solutes and membranes was completely screened by the salt ions. Meanwhile, several hypotheses such as membrane swelling, hydration layer thinning and particle collision were provided to explain the change of model parameters by highly concentrated salt. (C) 2011 Elsevier B.V. All rights reserved.
KeywordDesalination Salt Effect Membrane Swelling Dehydration Nanofiltration
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1016/j.memsci.2011.01.066
Indexed BySCI
Language英语
WOS KeywordATOMIC-FORCE MICROSCOPY ; AMINO-ACID ; DEAD-END ; PERFORMANCE ; SEPARATION ; DESALINATION ; WATER ; ELECTROLYTES ; PURIFICATION ; TEMPERATURE
WOS Research AreaEngineering ; Polymer Science
WOS SubjectEngineering, Chemical ; Polymer Science
WOS IDWOS:000289829200016
Citation statistics
Cited Times:64[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5047
Collection生化工程国家重点实验室
Corresponding AuthorWan, YH
Affiliation1.Chinese Acad Sci, Natl Key Lab Biochem Engn, Inst Proc Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Luo, Jianquan,Wan, Yinhua,Wan, YH. Effect of highly concentrated salt on retention of organic solutes by nanofiltration polymeric membranes[J]. JOURNAL OF MEMBRANE SCIENCE,2011,372(1-2):145-153.
APA Luo, Jianquan,Wan, Yinhua,&Wan, YH.(2011).Effect of highly concentrated salt on retention of organic solutes by nanofiltration polymeric membranes.JOURNAL OF MEMBRANE SCIENCE,372(1-2),145-153.
MLA Luo, Jianquan,et al."Effect of highly concentrated salt on retention of organic solutes by nanofiltration polymeric membranes".JOURNAL OF MEMBRANE SCIENCE 372.1-2(2011):145-153.
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