Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Effect of Calcium Sources for the Treatment of Wastewater Containing High Fluoride

고농도의 불소함유폐수 처리시 칼슘원에 따른 영향

  • Kim, Seung-Ha (Department of Environmental Engineering, Chungbuk National University) ;
  • Kim, Keum-Yong (Department of Environmental Engineering, Chungbuk National University) ;
  • Ryu, Hong-Duck (Department of Environmental Engineering, Chungbuk National University) ;
  • Lee, Sang-Ill (Department of Environmental Engineering, Chungbuk National University)
  • Received : 2010.08.31
  • Accepted : 2011.05.20
  • Published : 2011.05.31
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Abstract

As production of LCD increases, it has become necessary to find an economically efficient way of treating LCD wastewater with high concentration of fluoride. This study focuses on the calcium sources : $CaCl_2$, $Ca(OH)_2$ and $CaCO_3$ for the treatment of the LCD wastewater including high concentration of fluoride. Of course considering removal efficiency and economical aspect, study is continued. Then this study have objective giving aid to field. Consequently, each calcium source's removal efficiency was measured in various pH, calcium dosage, reaction time, and mixing intensity. The optimum operational conditions for $CaCl_2$ were found to be pH of 7, calcium dosage of 0.4[Ca]/[F] (mol / mol), 1 hr of operation and 200 rpm of mixing intensity. For $Ca(OH)_2$, they were pH of 7, calcium dosage of 30 mL/L, 1 hr of operation, and 200 rpm of mixing intensity. While $CaCO_3$ had operational conditions of pH of 4, calcium dosage of 30 mL/L, 1 hr operation and 200 rpm of mixing intensity. But it is recommended to use calcium sources according to various field conditions.

본 연구는 고농도의 불소가 함유된 LCD 폐수를 처리하는데 있어, 칼슘원에 따른 제거 효율과 경제성에 부합되는 조건을 도출하여 실제 현장에 적용하는데 목적이 있다. 이를 위하여 칼슘원으로 $CaCl_2$, $Ca(OH)_2$ 및 $CaCO_3$를 이용하여 각각 pH, 칼슘주입량, 반응시간 및 교반속도의 변화에 따른 특성을 관찰하였다. 그 결과 $CaCl_2$의 경우 pH 7, 칼슘주입량 0.4[Ca]/[F] (mol / mol), 1시간, 200 rpm으로 결정되었고, $Ca(OH)_2$의 경우 pH 7, 칼슘주입량 30 mL/L, 1시간, 200 rpm으로 결정하였으며, $CaCO_3$의 경우 pH 4, 칼슘주입량 30 mL/L, 1시간, 200 rpm으로 적용하는 것이 최적조건이라고 판단되었다. 그러나 현장의 상황에 따라 적용 조건의 변경이 가능하다.

Keywords

References

  1. 황달연, "고농도 불소 산업폐수 처리방법에 관한 연구" 금오공과대학교, 석사학위논문(2006).
  2. 환경부, "수질환경보전법 시행규칙 전부개정령," 환경부령 제262호(2007).
  3. 이종열, 김상식, 강신현, "불소함유 폐수의 처리방법," 대한민국특허공보 제3997호, 대한민국특허청, 서울, pp. 67-72 (1995).
  4. L. Fang, K. N. Ghimire, M. Kuriyama, K. lnoue, and K. Maakino., "Removal of floride using some Lanthanum(III)-loaded adsorbenrs with different functional groups and polymer matrices" J. Chem. Technol. Biotechnol., 78, 1038-1047(2003). https://doi.org/10.1002/jctb.902
  5. 나재식, "소석회와 희토류 흡착제를 이용한 불소 제거 연구," 신기술연구소논문집, 제28집, 1999년 10월.
  6. N.V.R. M. Rao and C. S. Bhaskaran., "Studies on defluoridation of water," J. Fluorine Chem., 41, 17-24(1988). https://doi.org/10.1016/S0022-1139(00)83012-2
  7. Haron, M. J., Yunus, W., Wasay, S. A. and Uchiumi, A., "Sorption of fluoride ions from aqueous solutions by a yttrium-loaded poly (Hydroxamic acid) resin," The International of environmental studies, 48(3/4), 245-,(1995). https://doi.org/10.1080/00207239508710994
  8. 이윤택, "불소 함유 산업 폐수의 재사용을 위한 처리 공정 개발" 금오공과대학교, 석사학위논문(2001).
  9. Povorov, A. A., Pavlova, V. F., Nacheva, L. L., Erokhina, L. V. and Kolomiytseva, O. N., "Hydrofluoric acid recovery integrated membrane technology from galss production concentrated washing water," Desalination, 149, 115-120 (2002). https://doi.org/10.1016/S0011-9164(02)00741-5
  10. 김영임, "칼슘 침전법에 의한 불소 및 인산 폐수 처리에 관한 연구" 이화여자대학교, 석사학위논문(2003).
  11. 김승하, 김금용, 임채성, 이상일, "후속되는 struvite 결정화 반응을 고려한 불소 제거," 한국수처리학회지, 17(3), 141-150(2009).
  12. 김영임, 김동수, "칼슘 침전법에 의한 불소 처리에 관한 연구," 한국물환경학회지, 23(3), 371-376(2007).
  13. 변혜정, 최원호, 박주양, "시멘트 페이스트를 이용한 혼합 불산폐수처리," 대한환경공학회지, 29(8), 909-914(2007).
  14. Agyei, N. M., Strydom, C. A. and Potgieter, J.H., "The Removal of Phosphate Ions from Aqueous Solution by Fly Ash, Slag, Ordinary Portland Cement and Related Blends," Cem. Concrete Res., 32, 1889-1897(2002). https://doi.org/10.1016/S0008-8846(02)00888-8
  15. Raichur, A. M. and Basu, M. J., "Adsorption of Fluoride onto Mixed Rare Earth Oxides," Sep. purification Technol., 24, 121-127(2001). https://doi.org/10.1016/S1383-5866(00)00219-7
  16. 이진숙, 김동수, "폐굴껍질을 흡착제로 한 불소폐수 처리 특성에 관한 연구칼슘 침전법에 의한 불소 처리에 관한 연구," 한국물환경학회지, 23(2), 222-227(2007).

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