Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
권호 표지

Treatment of Cu-EDTA by using Photocatalytic Oxidation Process - Comparison between UV Lamp and Solar Light -

광산화 공정을 이용한 Cu-EDTA 처리 - 인공 자외선램프와 태양광의 처리경향 비교 -

  • Shin, In-Soo (Division of Civil and Environmental Engineering, Kwandong University) ;
  • Choi, Bong-Jong (Division of Civil and Environmental Engineering, Kwandong University) ;
  • Lee, Seung-Mok (Division of Civil and Environmental Engineering, Kwandong University) ;
  • Yang, Jae-Kyu (LG Environmental Strategy Institute)
  • Received : 2004.10.11
  • Accepted : 2004.11.15
  • Published : 2005.01.30
Download PDF
⟨ Previous Next ⟩

Abstract

Effect of the pH, molar ratio of Cu(II)/EDTA, concentration of Cu(II)-EDTA and ionic strength on the photocatalytic oxidation(PCO) of Cu(II)-EDTA in solar light was studied in this work. Experimental results in this work were compared with previous results obtained with UV-lamp. In the kinetics, Cu(II)-EDTA decomposition was favorable below neutral pH. The removal of Cu(II) and DOC was favorable as $TiO_2$ dosage increased. The initial rate for the decomplexation of Cu(II)-EDTA linearly increased as the concentration of Cu(II)-EDTA increased. The removal of Cu(II) and DOC was not much affected by variation of ionic strength with $NaClO_4$ as a background ion while much reduction was observed in the presence of background ions having higher formal charges. The removal trend of Cu(II) and DOC with variation of ionic strength and concentration of Cu(II)-EDTA in solar light was similar with that in UV light. Variation of the molar ratio of Cu(II)/EDTA showed a negligible effect on the removal of both Cu(II) and DOC. However, removal of both Cu(II) and DOC was two-times greater than that previous results obtained with UV light.

Keywords

Acknowledgement

Supported by : 한국과학재단

References

  1. 김근한, 신인수, 최봉종, 이승복, 양재규, $TiO_2$에 의한 Cu(II)-EDTA 흡착에서 음이온물질 및 pH 영향, 대한환경공학회지, 25(5), pp. 644-649 (2003)
  2. 신인수, 최봉종, 이승목, 양재규, $TiO_2$ 광촉매반응을 이용한 구리함유 폐수처리 연구, 대한환경공학회지, 25(10), pp.1225-1232 (2003)
  3. 오정무, 태양에너지 이용에 관한 현황 및 전망, 화학공학, 18(14), pp. 301-307 (1980)
  4. 윤경식, 광전기화학과 태양에너지의 변호, 화학공업과 기술, 6(3), pp.43-52 (1988)
  5. Boston. J. R., The Photochemical Conversion and Storage of Solar Energy: An Historical Perspective, Solar Eng. Mat. Solar Cells, 38, pp. 543-554 (1995) https://doi.org/10.1016/0927-0248(94)00208-8
  6. Chang, W. and Lin, W. Y., Bactericidal Activity of $TiO_2$ Photocatalyst in Aqueous Media: Toward a Solar-Assisted Water Disinfection System, Environ. Sci. Technol., 28(5), pp. 934-938 (1994) https://doi.org/10.1021/es00054a027
  7. Cho, I. H., Kim, H. Y. and Zoh, K. D., Detoxification of Trichlchloroethylene(TCE) using Solar Light/$TiO_2$ in a UV Concentrating Radiation System, J. Water Environment and Technology, 1(1), pp. 37-42 (2003) https://doi.org/10.2965/jwet.2003.37
  8. Davis, A. P. and Green, D. L., Photocatalytic Oxidation of Cadmium-EDTA with Titanium Dioxide, Environ. Sci. Technol., 33(4), pp. 609-617 (1999) https://doi.org/10.1021/es9710619
  9. Foster, N. S., Noble, R. D. and Koval, C. A., Reversible Photoreductive Deposition and Oxidative Dissolution of Copper Ions in Titanium Dioxide Aqueous Suspensions, Environ. Sci. Technol., 27(2), pp. 350-356 (1993) https://doi.org/10.1021/es00039a016
  10. Noguelra, R. F. and Jardin, W. F., Decontamination using Solar Light, Solar Energy, 56(5), pp. 471-477 (1996) https://doi.org/10.1016/0038-092X(96)00036-9
  11. Riley, R. G., Zachara, J. M. and Wobber, F. J., Chemical Contaminants on DOE Lands and Selection of Contaminant Mixtures for Subsurface Science Research, U.S. Department of Energy, DOE/ER-0547T (1992)
  12. Robero, A.V., Caprio, A., and Insola, R., Advanced Oxidation Processes(AOP) for Water Purification and Recovery, Catalysis Today, 53, pp. 51-59 (1999) https://doi.org/10.1016/S0920-5861(99)00102-9
  13. Yang, J. K. and Davis, A. P., Photocatalytic Oxidation of Cu(II)-EDTA with Illuminated $TiO_2$: Kinetics, Environ. Sci. Technol., 34(17), pp. 3789-3795 (2000) https://doi.org/10.1021/es990874p