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Concentration polarization in concentrated saline solution during desalination of iron dextran by nanofiltration
Luo, Jianquan1,2; Ding, Luhui2; Su, Yi1; Wei, Shaoping3; Wan, Yinhua1; Wan, YH
2010-11-01
Source PublicationJOURNAL OF MEMBRANE SCIENCE
ISSN0376-7388
Volume363Issue:1-2Pages:170-179
AbstractDesalination of iron dextran solution containing a high salt content (approximate to 18% NaCl(w/v)) by nanofiltration (NF) was examined using three commercial nanofiltration membranes (NF270, Desal-5 DL, Nanomax50). With these NF membranes, iron dextran was almost completely rejected, while salt rejection was so small (R(obs) approximate to -2 to 1.5%) that salt ions could pass through the membranes easily. No irreversible fouling was found for each membrane used and a distinct transmembrane pressure (TMP) drop appeared during diafiltration at a flux of 15.5 Lm(-2) h(-1) (20 degrees C). And the weakening of concentration polarization (CP) of iron dextran was thought to be the possible reason for TMP drop. It was found that with the decrease of salt concentration, the viscosity of solution decreased, thus enhancing the back transport of iron dextran molecules. As a result, the concentration of iron dextran at membrane surface and filtration resistance could be reduced. However, this effect showed a little hysteresis due to the high viscosity of the feed, the pump pulse or pause would counteract the hysteresis by promoting the molecule to redisperse. Flux history had a strong influence on CP of iron dextran because of shear-enhanced diffusion. Furthermore, the effect of flux, stirring speed, and temperature on CP of iron dextran was also examined in "total recirculation" experiments. These results from the laboratory-scale tests could serve as valuable guide for process design in industrial production. (C) 2010 Elsevier B.V. All rights reserved.
KeywordNanofiltration Iron Dextran Concentration Polarization Back Diffusion
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1016/j.memsci.2010.07.033
Indexed BySCI
Language英语
WOS KeywordMEMBRANE FILTRATION ; FERMENTATION BROTH ; LIMITING FLUX ; ORGANIC-MATTER ; CAKE FORMATION ; ULTRAFILTRATION ; SEPARATION ; RETENTION ; DECLINE ; SALTS
WOS Research AreaEngineering ; Polymer Science
WOS SubjectEngineering, Chemical ; Polymer Science
WOS IDWOS:000282794100018
Citation statistics
Cited Times:33[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/5583
Collection生化工程国家重点实验室
Corresponding AuthorWan, YH
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Univ Technol Compiegne, EA TIMR 4297, F-60205 Compiegne, France
3.Guangxi Res Inst Chem Ind, Nanning 530001, Peoples R China
Recommended Citation
GB/T 7714
Luo, Jianquan,Ding, Luhui,Su, Yi,et al. Concentration polarization in concentrated saline solution during desalination of iron dextran by nanofiltration[J]. JOURNAL OF MEMBRANE SCIENCE,2010,363(1-2):170-179.
APA Luo, Jianquan,Ding, Luhui,Su, Yi,Wei, Shaoping,Wan, Yinhua,&Wan, YH.(2010).Concentration polarization in concentrated saline solution during desalination of iron dextran by nanofiltration.JOURNAL OF MEMBRANE SCIENCE,363(1-2),170-179.
MLA Luo, Jianquan,et al."Concentration polarization in concentrated saline solution during desalination of iron dextran by nanofiltration".JOURNAL OF MEMBRANE SCIENCE 363.1-2(2010):170-179.
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