Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Removal of Natural Organic Matter (NOM) by Carbon Nanotubes Modified PVDF Membrane

탄소나노튜브(CNT)-PVDF 막을 이용한 자연용존유기물 제거

  • Cho, Hyun-Hee (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Cha, Min-Whan (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Park, Jae-Woo (Department of Civil and Environmental Engineering, Hanyang University)
  • 조현희 (한양대학교 건설환경공학과) ;
  • 차민환 (한양대학교 건설환경공학과) ;
  • 박재우 (한양대학교 건설환경공학과)
  • Published : 2012.01.30
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Abstract

In this research, the application of carbon nanotubes (CNTs) modified PVDF (polyvinylidene fluoride) membrane was tested as a simply and beginning attempt to overcome membrane fouling because CNTs importantly affect the transport of natural organic matter (NOM). Suwannee River fulvic acid (SRFA) as the representative of NOM was selected and its sorption results with single-walled CNT (SWCNT), multi-walled CNT (MWCNT), and oxidized MWCNT (O-MWCNT) were obtained through the batch experiment. SRFA sorption isotherms had a strong nonlinearity and its sorption capacity followed the order O-MWCNT < MWCNT < SWCNT. The adsorbed mass of SRFA on each CNT decreased as a function of pH due to their charge repulsion. For the CNT-PVDF membrane filtration experiments, the suspended CNT solution (10 mg/40 mL) was incorporated into $0.45{\mu}m$-PVDF membrane and 5 mg/L of SRFA solution was monitored using UV detector connected with high pressure pump after passing through CNT-PVDF membrane. The SRFA removal efficiency by MWCNT-PVDF membrane was the strongest among other modified membranes. This suggests that the CNT modified microfiltration (MF) membrane might effectively and selectively apply to treat the contaminated water including organic compounds in the presence of NOM.

Keywords

References

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