Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
권호 표지
DOI QR코드

DOI QR Code

Removal Characteristics of Cd and Pb by Adsorption on Red Mud

Red mud를 이용한 중금속 Cd 및 Pb의 흡착제거 특성

  • 임수빈 (경성대학교 환경공학과) ;
  • 김재곤 (한국지질자원연구원 지질재해연구실) ;
  • 송호철 (세종대학교 환경에너지융합학과)
  • Received : 2011.01.24
  • Accepted : 2011.05.27
  • Published : 2011.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

The objective of this study is to investigate the removal characteristics of cadmium(Cd) and lead(Pb) by adsorption on red mud and to study the adsorption characteristics of Cd and Pb using red mud activated by acid treatment and calcination. The adsorption of Cd and Pb on red mud was significantly achieved within 1hour and equilibrated after 5 hours. The adsorption capacity of Cd and Pb on red mud increased with increasing pH. The neutralization of red mud by distilled water or acid and the activation of red mud by acid treatment or calcination decreased the adsorption capacity of Cd and Pb on red mud, suggesting that Cd and Pb could be effectively eliminated by adsorption on red mud without any pretreatment or modification. Both Langmuir and Freundlich models were successfully applied to describe the adsorption behavior of Cd and Pb on red mud. The $q_m$ of Langmuir adsorption model and $K_F$ of Freundlich adsorption model were 5.230mg/g and 1.118mg/g for Cd and 22.222mg/g and 7.241mg/g for Pb, respectively.

본 연구에서는 red mud를 흡착제로 이용하여 산성광산배수내 대표적인 유해 중금속인 Cd과 Pb의 흡착특성을 파악하고, 산처리와 소성처리 방식으로 활성화된 red mud에 의한 Cd와 Pb의 중금속 흡착능의 변화를 알아보고자 하였다. Red mud에 대한 Cd과 Pb의 흡착은 반응시간 30분 이내에 대부분 발생하였으며, 5시간 경과 후에는 평형상태에 도달하는 것으로 나타났다. pH가 증가할수록 red mud에 대한 Cd 및 Pb의 흡착은 증가하는 것으로 나타났다. Red mud를 증류수 혹은 산으로 중화 처리하거나 산처리 혹은 소성처리 등과 같은 활성화 처리할 경우 Cd와 Pb에 대한 red mud의 흡착능은 오히려 감소하는 것으로 나타났으므로 red mud를 이용한 Cd와 Pb의 흡착제거는 가공하지 않은 원 상태의 red mud를 이용하는 것이 효과적인 것으로 파악되었다. Red mud에 대한 Cd와 Pb의 흡착거동은 Langmuir 및 Freundlich 등온흡착모델에 모두 잘 적용되었으며, Red mud 흡착제에 대한 Langmuir 등온 흡착식의 $q_m$ 과 Freundlich 등온흡착식의 $K_F$ 상수값은 Cd에 대하여 각각 5.230mg/g와 1.118mg/g이었으며 Pb에 대해서는 각각 22.222mg/g와 7.241mg/g의 값을 나타내고 있었다.

Keywords

Acknowledgement

Supported by : 한국지질자원연구원

References

  1. 김이태, 배우근, 김우정, 정원식(2003), Red mud를 이용한 토양 및 슬러지내 중금속 제거특성, 2003년 추계학술발표회 논문집, 한국지하수토양환경학회, pp. 73-77.
  2. 배재흠, 김정식(1998), 유독성 산업 폐수 처리를 위한 적니의 이용연구, 대한환경공학회지, Vol. 20, No. 4, pp. 543-556.
  3. Altundogan, H.S., Altundogan, S., Tumen, F., Bildik, M.(2000), Arsenic Removal from Aqueous Solutions by Adsorption on Red Mud, Waste Management, Vol. 20, No. 8, pp. 761-767. https://doi.org/10.1016/S0956-053X(00)00031-3
  4. Apak, R., Tutem, E., Jugul, M., Hizal, J.(1998), Heavy Metal Cation Retention by Unconventional Sorbents (Red Muds and Fly Ashes), Water Research, Vol. 32, pp. 430-440. https://doi.org/10.1016/S0043-1354(97)00204-2
  5. Bertocchi, A.F., Ghiani, M., Peretti, R., Zucca, A.(2006), Red Mud and Fly Ash for Remediation of Mine Sites Contaminated with As, Cd, Cu, Pb and Zn, Journal of Hazardous Material, Vol. 134, No. 2, pp. 112-119. https://doi.org/10.1016/j.jhazmat.2005.10.043
  6. Erdem, M., Altundogan, H.S., Tumen, F.(2004), Removal of Hexavalent Chromium by Using Heat-activated Bauxite, Minerals Engineering, Vol. 17, No. 9/10, pp. 1045-1052. https://doi.org/10.1016/j.mineng.2004.04.013
  7. Genc-Fuhrman, H., Tjell, J.C., McConchie, D.(2004), Adsorption of Arsenic from Water Using Activated Neutralized Red Mud, Environmental Science & Technology, Vol. 38, No. 8, pp. 2428-2434. https://doi.org/10.1021/es035207h
  8. Gupta, V.K., Sharma, S.(2002), Removal of Cadmium and Zinc from Aqueous Solutions Using Red Mud, Environmental Science & Technology, Vol. 36, No. 16, pp. 3612-3617. https://doi.org/10.1021/es020010v
  9. Gupta, V.K., Gupta, M., Sharma, S.(2001), Process Development for the Removal of Lead and Chromium from Aqueous Solutions Using Red Mud - an Aluminum Industry Waste, Water Research, Vol. 35, No. 5, pp. 1125-1134. https://doi.org/10.1016/S0043-1354(00)00389-4
  10. Han, S.W., Kim, D.K., Hwang, I.G., Bae, J.H.(2002), Development of Pellet-type Adsorbents for Removal of Heavy Metal Ions from Aqueous Solutions Using Red Mud, Journal of Industrial and Engineering Chemistry, Vol. 8, No. 2, pp. 120-125.
  11. Paramguru, R.K., Rath, P.C., Misra, V.N.(2005), Trends in Red Mud Utilization - A Review, Mineral Processing & Extractive metallurgy review, Vol. 26, No. 1, pp. 1-29.
  12. Santona, L., Castaldi, P., Melis, P.(2006), Evaluation of the Interaction Mechanisms between Red Muds and Heavy Metals. Journal of Hazardous Materials, Vol. 136, No. 2, pp. 324-329. https://doi.org/10.1016/j.jhazmat.2005.12.022
  13. Vaclavikova, M., Misaelides, P., Gallios, G., Jakabsky, S., Hredzak, S.(2005), Removal of Cadmium, Zinc, Copper and Lead by Red Mud, an Iron Oxides Containing Hydrometallurgical Waste. Studies in Surface Science and Catalysis. Vol. 155, pp. 517-525.
  14. Zouboulis, A.I., Kydros, K.A.(1993), Use of Red Mud for Toxic Metals Removal - the Case of Nickel, Journal of Chemical Technology & Biotechnology, Vol. 58, No. 1, pp. 95-101.