• 제목/요약/키워드: 폴리플루오린화비닐리덴

검색결과 1건 처리시간 0.018초

수산화나트륨의 노출 강도가 PVDF 분리막 성능에 미치는 영향 (Effects of exposure intensity of sodium hydroxide on PVDF membrane performance)

  • 이용수;강하영;김우하;이창규;김종오
    • 상하수도학회지
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    • 제32권5호
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    • pp.453-460
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    • 2018
  • 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, 10% of accumulated defluorination was confirmed up to 166g.hr/L which reflects the exposure time. However, membrane resistance was confirmed to be reduced by about 10%. 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.