Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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The Characteristics of Adsorption Treatment of Cr(VI)-containing Wastewater using Kudzu as the Adsorbent

칡을 이용(利用)한 크롬페수(廢水) 흡착(吸着) 처리(處理) 특성(特性)

  • Seo, Myung-Soon (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Kim, Dong-Su (Department of Environmental Science and Engineering, Ewha Womans University)
  • 서명순 (이화여자대학교 환경공학과) ;
  • 김동수 (이화여자대학교 환경공학과)
  • Published : 2008.06.27
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Abstract

The kudzu has been investigated as an adsorbent for treatment of Cr(VI)-containing wastewater. The specific surface of kudzu was analyzed to be $189.91m^2/g$ and its major composition were found to be nitrogen and oxygen. It was observed that adsorption reaction for Cr(VI) on kudzu meets 1st order in kinetics and Langmuir Model in equilibrium. As the pH of wastewater was increased, the adsorbed amount of Cr(VI) onto kudzu was increased due to the pre-combination of $OH^-$ with adsorbent and the efficiency of adsorption was found to be 60% when real electroplating Cr(VI)-containing wastewater was applied.

칡을 크롬폐수 처리에 있어 흡착제로서 활용하는 방안에 대한 연구를 수행하였다. 칡은 대부분 질소와 산소로 이루어져 있고 칡의 비표면적은 약 $189.91m^2/g$으로 나타났다. 칡에 대한 Cr(VI) 의 흡착은 8시간 이내에 이루어졌으며 칡에 대한 Cr(VI)의 흡착은 Langmuir Model을 따르는 것으로 파악되었다. 또한, 흡착제의 크기가 작을수록 Cr(VI)에 대한 초기 흡착반응이 빠르게 진행되고 평형 농도 또한 낮게 나타나는 것을 관찰할 수 있었고 반응 초기 시간에 따른 칡에 대한 Cr(VI)의 흡착은 1차 반응을 비교적 잘 따르는 것으로 파악되었다. 한편, 염기성 상태에서의 Cr(VI)은 수중의 $OH^-$와 결합하여 흡착반응에 유리한 형태로 전환되어 칡에 대한 흡착을 도모하는 것으로 검토되었으며 실제 도금폐수의 Cr(VI)의 처리에 칡을 흡착제로 적용한 결과 약 60%의 Cr(VI)이 흡착 제거되는 것으로 파악되었다.

Keywords

References

  1. Cotruvo, J. A. and Craig, D. V., 1990: Rationale for water quality standards and goals, In: Pontius, F.W. (Ed.), Water Quality and Treatment. American Water Works Association, McGraw Hill Inc., New York, U.S.A
  2. Eary, L. E. and Rai, D., 1989: Kinetics of chromate reduction by ferrous ions derived from hematite and biotite at $25^{\circ}C$, American Journal of Science, 289, pp. 180-213 https://doi.org/10.2475/ajs.289.2.180
  3. Allen, S. J., 1996: Types of adsorbent materials. In: MaKay, G. (Ed.), Use of Adsorbents for the Removal of Pollutants from Wastewater. CRC Press, Boca Raton, pp. 59-97
  4. Brown, P. A., Gill, S. A., and Allen, S. J., 2000: Metal removal from wastewater using peat, Water Res, 34(16), pp. 3907-3916 https://doi.org/10.1016/S0043-1354(00)00152-4
  5. Frank, W. L. and McMullen, M. D., 1996: Removing chromium from groundwater and process wastewater, The National Environmental Journal March-April, pp. 36-36
  6. Johnson, P. D. et al., 2002: Peanut hull pellets as a single use adsorbent for the capture of Cu(II) fromwastewater, Waste Manage, 22, pp. 471-480 https://doi.org/10.1016/S0956-053X(01)00036-8
  7. MaKay, G. and Porter, J. F., 1997: Equilibrium parameters for the sorption of copper, cadmium, and zinc ions onto peat, J. Chem. Technol. Biotechnol, 69, pp. 309-320 https://doi.org/10.1002/(SICI)1097-4660(199707)69:3<309::AID-JCTB724>3.0.CO;2-W
  8. Alderman, D. H., 1998: A vine for postmodern times: an update on kudzu at the close of the twenty century, Southeast Geography, 38, pp. 167-179 https://doi.org/10.1353/sgo.1998.0006
  9. Harrington, T. B. et al, 2003: Kudzu (Pueraria Montana) community responses to herbicides, burning, and high density loblolly pine, Weed Science, 51, pp. 965-974 https://doi.org/10.1614/02-142