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Cho, Jaeweon
도시환경 감각연구소/Sense Laboratory
Research Interests
  • Convergence of Science and Arts; Environment Ethics; Meta-modernism in Semantics Engineering

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Removal and transport mechanisms of arsenics in UF and NF membrane processes

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Title
Removal and transport mechanisms of arsenics in UF and NF membrane processes
Author
Kim, Do HeeKim, Kyoung WoongCho, Jaeweon
Keywords
Arsenic; Convection; Diffusion; J0/k ratio; NF; UF
Issue Date
2006
Publisher
IWA PUBLISHING
Citation
JOURNAL OF WATER AND HEALTH, v.4, no.2, pp.215 - 223
Abstract
In this study, the removal and transport mechanism of ionized and non-ionized arsenics through NF and UF membranes were systemically investigated. The charge repulsion between the membrane surface and arsenic ions was an important mechanism for the rejection of ions by a charged membrane, in addition, the effect of JO/k ratio was dependent on the membrane and ion charge, but the cross-flow velocity was not significantly affected. Both diffusions and convection are proved to affect the transport of arsenic ions. The reflection coefficients (σ) of both UF and NF membranes increased with increasing pH; the reflection coefficients of arsenate were higher than those of arsenite under the same operating conditions. The spiral-wound module exhibited slightly higher arsenate removal than the flat-sheet module under the same operating conditions. © IWA Publishing 2006
URI
https://scholarworks.unist.ac.kr/handle/201301/11887
DOI
10.2166/wh.2006.004
ISSN
1477-8920
Appears in Collections:
UEE_Journal Papers
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