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Influence of solution chemistry on the surface heterogeneity of reverse osmosis membrane

Authors
Kim, YoungjinLee, SangyoupHong, Seungkwan
Issue Date
4월-2012
Publisher
DESALINATION PUBL
Keywords
Membrane surface characterization; Dynamic hysteresis; RO membrane; Chemical heterogeneity
Citation
DESALINATION AND WATER TREATMENT, v.43, no.1-3, pp.308 - 313
Indexed
SCIE
SCOPUS
Journal Title
DESALINATION AND WATER TREATMENT
Volume
43
Number
1-3
Start Page
308
End Page
313
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/108838
DOI
10.1080/19443994.2012.672212
ISSN
1944-3994
Abstract
The chemical heterogeneity of reverse osmosis membrane surface and its impacts on membrane fouling were investigated using dynamic hysteresis, which is a newly developed surface analytical technique. Based on dynamic hysteresis measurements, it has been demonstrated that the chemical heterogeneity of membrane surface was greatly influenced by solution-pH and ionic strength. Significant variation of dynamic hysteresis was observed as solution pH changed, implying the alteration of membrane surface heterogeneity. Interestingly, there existed the interplay between chemical and physical surface heterogeneity with respect to solution ionic strength. At low ionic strength, dynamic hysteresis mostly reflected chemical surface heterogeneity, while physical surface heterogeneity played more dominant role in the change of dynamic hysteresis with increasing ionic strength. This implies that membrane fouling due to chemical surface heterogeneity of the membrane is less remarkable in seawater desalination compared to wastewater and brackish water treatments. In addition, mechanisms and factors affecting chemical and physical surface heterogeneity and their interplay with respect to solution chemistry including pH, ionic strength and divalent cation concentration are discussed and elucidated.
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Graduate School > Department of Environmental Engineering > 1. Journal Articles
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Hong, Seung kwan
공과대학 (건축사회환경공학부)
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