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Effects of pH and salt on nanofiltration-a critical review
Luo, Jianquan; Wan, Yinhua
2013-07-01
Source PublicationJOURNAL OF MEMBRANE SCIENCE
Volume438Issue:0Pages:18-28
AbstractNanofiltration (NF), as a powerful tool for separation of small molecules and salts, has attracted growing attention in many applications such as wastewater treatment, water purification, desalination, food processing and bio-separation. It is well known that pH and salt conditions have significant influence on NE performance. In order to manipulate NE process and optimize its efficiency, it is very important to get insights into the effects of pH and salt on nanofiltration. This paper aims at reviewing the reports on NE performance at different pH and salt conditions, focusing on the mechanisms behind various phenomena induced by pH and salt. The effects of pH and salt on NE are mainly reflected in the variations of membrane flux/permeability, solute rejection and fouling behavior, which also depend on both solute type and solution composition. In order to explain these effects, the changes of membrane properties are evaluated by physical, chemical and mathematical characterization methods. Eight mechanisms for pH and salt effects are summarized and several practical advices for NE operation are provided. Besides, some interesting opinions such as dominant-ions, co-ions competition, salting-out induced pore swelling, charge-induced concentration polarization (CP) are reviewed to elucidate some confusing phenomena reported previously. This review intends to not only offer a clear illustration on this special issue but also to provide a guide to optimize NE separation and maintenance. (C) 2013 Elsevier B.V. All rights reserved.
KeywordMembrane Filtration Mechanism Electrostatic Effect Membrane Swelling Nf
SubtypeReview
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
Indexed BySCI
Language英语
WOS KeywordATOMIC-FORCE MICROSCOPY ; WASTE-WATER TREATMENT ; STREAMING POTENTIAL MEASUREMENTS ; ENHANCED FILTRATION SYSTEM ; NF MEMBRANES ; MASS-TRANSFER ; SEPARATION PERFORMANCE ; AQUEOUS-SOLUTIONS ; ORGANIC-MATTER ; FLUX DECLINE
WOS Research AreaEngineering ; Polymer Science
WOS SubjectEngineering, Chemical ; Polymer Science
WOS IDWOS:000319500800003
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13355
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Luo, Jianquan,Wan, Yinhua. Effects of pH and salt on nanofiltration-a critical review[J]. JOURNAL OF MEMBRANE SCIENCE,2013,438(0):18-28.
APA Luo, Jianquan,&Wan, Yinhua.(2013).Effects of pH and salt on nanofiltration-a critical review.JOURNAL OF MEMBRANE SCIENCE,438(0),18-28.
MLA Luo, Jianquan,et al."Effects of pH and salt on nanofiltration-a critical review".JOURNAL OF MEMBRANE SCIENCE 438.0(2013):18-28.
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