수산화나트륨의 노출 강도가 PVDF 분리막 성능에 미치는 영향Effects of exposure intensity of sodium hydroxide on PVDF membrane performance
- Other Titles
- Effects of exposure intensity of sodium hydroxide on PVDF membrane performance
- Authors
- 이용수; 강하영; 김우하; 이창규; 김종오
- Issue Date
- Oct-2018
- Publisher
- 대한상하수도학회
- Keywords
- 분리막; 폴리플루오린화비닐리덴; 열화; 막여과저항; 탈불소화; Membrane; Polyvinylidene fluoride; Degradation; Membrane resistance; Defluorination
- Citation
- 상하수도학회지, v.32, no.5, pp.453 - 460
- Indexed
- KCI
- Journal Title
- 상하수도학회지
- Volume
- 32
- Number
- 5
- Start Page
- 453
- End Page
- 460
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/16017
- DOI
- 10.11001/jksww.2018.32.5.453
- ISSN
- 1225-7672
- Abstract
- The impact of sodium hydroxide, which is one of chemicals of clean in place (CIP) for removing membrane fouling, on the PVDF membrane is reviewed with respect to physical/chemical structural change, the permeability affected therefrom.
Based on the cleaning concentration applied in membrane water treatment facilities, defluorination accumulated according to exposure time is confirmed. Through FT-IR and EDS analysis, reduction of F and change of are confirmed as factors that affect the permeability of membrane. Membrane resistance, which affects permeability, is affected by loss of additives for hydrophilicity, rather than defluorination of PVDF material. Therefore, in order to check membrane degradation degree, an accelerated test by NaOH was carried out, loss of additives was confirmed, and then PVDF inherent characteristic was observed.
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