Removal Mechanisms of BTEX Compounds by RO/NF Membrane Processes

RO/NF막 공정을 이용한 BTEX 물질의 제어 특성 평가

  • Jang, Hyuewon (Hazardous Substances Research Center, Korea Institute of Science and Technology) ;
  • Park, Chanhyuk (Water Environment and Remediation Research Center, Korea Institute of Science and Technology) ;
  • Hong, Seungkwan (Department of Civil and Environmental Engineering, Korea University) ;
  • Yoon, Yeomin (CH2M HILL KOREA) ;
  • Jung, Jin-Young (Hazardous Substances Research Center, Korea Institute of Science and Technology) ;
  • Chung, Yun-Chul (Hazardous Substances Research Center, Korea Institute of Science and Technology)
  • 장혜원 (한국과학기술연구원 유해물질연구센터) ;
  • 박찬혁 (한국과학기술원 수질환경 및 복원연구센터) ;
  • 홍승관 (고려대학교 공과대학 사회환경시스템공학과) ;
  • 윤여민 ;
  • 정진영 (한국과학기술연구원 유해물질연구센터) ;
  • 정윤철 (한국과학기술연구원 유해물질연구센터)
  • Received : 2006.06.22
  • Accepted : 2006.08.01
  • Published : 2006.09.30

Abstract

A series of bench-scale membrane filtration experiments were performed to systematically investigate the removal mechanisms of reverse osmosis (RO) and nanofiltration (NF) membranes for BTEX (benzene, toluene, ethylene, xylene), trichloroethylene (TCE) and tetrachloroethylene (PCE). The molecular weight of these organic compounds ranged from 78 to 166 dalton. The rejection of organic compounds by RO/NF membranes varied significantly from 59.6 to 99.2% depending on solute and membrane types. Specifically, experimental results demonstrated that the removal efficiency of RO/NF membranes increased as solute molecular characteristics such as W/L (molecular width/length) ${\times}$ $M_W$ (molecular weight) and octanol-water partition coefficient increased. This observation suggested that the rejection of small organic compounds by RO/NF membranes was determined by the combined effect of physical (molecular size and shape) and chemical (hydrophobicity) properties.

Keywords

Acknowledgement

Grant : 생물학적 유해물질 제어기술 개발

Supported by : 한국과학기술연구원

References

  1. 환경부, 환경백서 2004, pp. 589-600 (2004)
  2. Agenson, K. O., Oh, J. and Urase, T., Retention of a Wide Variety of Organic Pollutants by Different Nanofiltration/ Reverse Osmosis Membranes: Controlling Parameters of Process, Journal of Membrane Science, 225, pp. 91-103 (2003) https://doi.org/10.1016/j.memsci.2003.08.006
  3. Bellona, C., Drewers, J. E., Xu, P. and Amy, G., Factors Affecting the Rejection of Organic Solutes during NF/RO Treatment - A Literature Review, Water Research, 38, pp. 2795-2809 (2004) https://doi.org/10.1016/j.watres.2004.03.034
  4. Kimura, K., Toshima, S., Amy, G. and Watanabe, Y., Rejection of Neutral Endocrine Disrupting Compounds (EDCs) and Pharmaceutical Active Compounds (PhACs) by RO Membranes, Journal of Membrane Science, 245, pp. 71-78 (2004) https://doi.org/10.1016/j.memsci.2004.07.018
  5. Kiso, Y., Kon, T., Kitao, T. and Nishmura, K., Rejection Properties of Alkyl Phthaltes with Nanofiltration Membranes, Journal of Membrane Science, 182(1-2), pp. 205-214 (2001) https://doi.org/10.1016/S0376-7388(00)00567-6
  6. Kosutic, K. and Kunst, B., Removal of Organics from Aqueous Solutions by Commercial RO and NF Membranes of Characterized Porosities, Desalination, 142(1), pp. 47-56 (2002) https://doi.org/10.1016/S0011-9164(01)00424-6
  7. Lee, S. W., Lee, J. M. and Jahng, D. J., Degradation of BTEX and Trichloroethylene by Pseudomonas Putida F1 and Burkholderia Cepacia G4, Korean J. Biotechnol. bioeng, 13(5), pp. 561-568 (1998)
  8. Nader, M. and Al-Bastaki, Treatment of Synthetic Industrial Wastewater with UV/$TiO_2$ and RO using Benzene as a Model Hydrocarbon, Desalination, 156(1-3), pp. 193-197 (2003) https://doi.org/10.1016/S0011-9164(03)00341-2
  9. Nghiem, L. D., Schafer, A. I. and Elimelech, M., Removal of Natural Hormones by Nanofiltration Membranes: Measurement, Modeling, and Mechanisms, Environmental Science and Technology, 38, pp. 1888-1896 (2004) https://doi.org/10.1021/es034952r
  10. Yoon, Y., Westerhoff, P., Snyder, S. A. and Wert, E. C., Nanofiltration and Ultrafiltration of Endocrine Disrupting Compounds, Pharmaceuticals and Personal Care Products, Journal of Membrane Science, 270(1-2), pp. 88-100 (2006) https://doi.org/10.1016/j.memsci.2005.06.045
  11. Yoon, Y., Westerhoff, P., Yoon, J. and Snyder, S. A., Removal of 17b-Estradiol and Fluoranthene by Nanofiltration and Ultrafiltration, Journal of Environmental Engineering- ASCE, 130(12), pp. 1460-1467 (2004) https://doi.org/10.1061/(ASCE)0733-9372(2004)130:12(1460)