$O_3/H_2O_2$를 이용한 고급산화공정에서 초기 $H_2O_2$ 농도에 따른 1,4-dioxane의 제거 특성 연구

A Study on the Degradation Characteristics of 1,4-dioxane at Different Initial $H_2O_2$ Concentration with Advanced Oxidation Process using Ozone and Hydrogen Peroxide

  • 박진도 (울산대학교 생명화학공학부) ;
  • 서정호 (울산과학대학 환경생활화학과) ;
  • 이학성 (울산대학교 생명화학공학부)
  • Park, Jin-Do (School of Chemical Engineering and BioEngineering, University of Ulsan) ;
  • Suh, Jung-Ho (Dept. of Environmental & Life Chemistry, Ulsan College) ;
  • Lee, Hak-Sung (School of Chemical Engineering and BioEngineering, University of Ulsan)
  • 발행 : 2005.10.31

초록

본 연구는 1,4-dioxane을 함유한 폐수를 $O_3/H_2O_2$ 고급산화공정에서 1,4-dioxane의 제거율 및 생물학적분해 가능성을 실험하였다. 산화공정에 사용한 반응기는 bubble column 형태이며, 초기 pH 및 과산화수소의 초기농도를 달리하여 14-dioxane의 제거특성을 실험하였다. $H_2O_2$의 초기농도는 $40{\sim}120\;mg/L$로 조절하였으며, 초기 pH는 6과 9로 조절하여 산화반응에 의한 1,4-dioxane의 제거율 및 $BOD_5$, TOC 등을 분석하였다. 실험 결과 동일한 초기 pH에서 $H_2O_2$의 초기농도가 높을수록 1,4-dioxane의 제거율은 증가하였다. 오존의 소비량과 과산화수소의 초기농도 사이에는 직선적인 제거율을 나타내었으며, 이러한 이유는 높은 초기 $H_2O_2$ 농도에서 hydroxyl radical($OH{\cdot}$) 및 hydroperoxy ions(${HO_2}^-$)의 생성을 가속화 시킨 것에 기인한다고 판단되었다. $O_3/H_2O_2$ 고급산화공정에서 과산화수소의 초기농도는 1,4-dioxane의 제거와 생물학적 분해가능성을 높이는 것으로 관찰되었다.

Advanced oxidation process involving $O_3/H_2O_2$ was used to eliminate 1,4-dioxane and to enhance the biodegradability of dioxane-contaminated water. Oxidation process was carried out in a bubble column reactor under different pH and $H_2O_2$ concentrations. The removal efficiencies of 1,4-dioxane were investigated at hydrogen peroxide concentration between 40 and 120 mg/L. At the same pH, removal efficiencies of 1,4-dioxane increased with increasing initial $H_2O_2$ concentration. There was a linear relationship between initial concentration of $H_2O_2$ and the amount of consumed $O_3$. It was observed that the high $H_2O_2$ concentration accelerated the generation of hydroperoxy ions(${HO_2}^-$) and hydroxyl radicals($OH{\cdot}$). Hydrogen peroxide enhanced the decomposition of 1,4-dioxane and the biodegradability of the solution.

키워드

참고문헌

  1. Annual Industrial Wasters Technical and Regulatory Conference, Conference Proceeding 7th Biological treatment of 1,4-dioxnaein wastewarter from an intergrated polyethlene terephthalate(PET) Sandy, T.;Grady, C.P. Jr.;Meininger, S.;Boc, R.
  2. Environ. Sci. Technol. v.32 Mechanism of the degradation of 1,4-dioxane in di8lute aqueous solution using the UV/hydrogen peroxide process Stefan, M.I.;Bolton, J.R. https://doi.org/10.1021/es970633m
  3. 1,4-dioxane Priority Existing Chemical No. 7 National Industrial Chemicals Nofification and Assessment Scheme (NICNAS)
  4. 대한환경공학회지 v.26 no.11 정수처리시스템에서 1,4-dioxane의 제거방안 임재림;이경혁;채선하;김순홍;안효원
  5. Water Research v.38 A study on the relationship between biodegradability enhancement and oxidation of 1,4-dioxzne using ozone and hydrogen peroxide Suh, J.H.;Mohseni, M. https://doi.org/10.1016/j.watres.2004.03.002
  6. OZONE : SCIENCE AND ENGINEERING v.1 Ozanation of water : Selectivity and Rate of Oxidation of Solutes Hoigne, J.;Bader, H. https://doi.org/10.1080/01919517908550834
  7. Standard methods for the examination of water and wastewater Clesceri, L.S.;Greenberg, A.E.;Eaton, A.D.
  8. Anal. Chem. v.66 $H_2O_2$ determination by 13-method and by $KMnO_4$ titration Klassen, M.V.;Marchington, D.;McGowan, H.C. https://doi.org/10.1021/ac00090a020
  9. Water Res. v.19 no.8 Rate constants of reactions of ozone with organic and inorgnic compounds in water 3. Inorganic compounds and radicals Hoigne, J.;Bader, H.;Haag, W.R.;Staehelin, J. https://doi.org/10.1016/0043-1354(85)90368-9
  10. Chemosphere v.35 no.11 Light assisted 1,4-Dioxane degradation Maurino, V.P.;Minero, C.C.;Pelizzetti, E.;Vincenti, M. https://doi.org/10.1016/S0045-6535(97)00322-6
  11. Environ. Sci. Technol. v.32 Mechanism of the degradation of 1,4-dioxane in dilute aqueous solution using the UV/hydrogen peroxide process Stefan, M.I.;Bolton, J.R. https://doi.org/10.1021/es970633m
  12. 대한환경공학회지 v.25 no.2 1,4-dioxane의 고도 산화 및 생화학적 분해 특성 연구 이병렬;김창균;서형준
  13. J. Phys. Chem. Ref., Data v.17 Critical review of rate constants for reactions of hydrated electrons, hydrogen atoms and hydroxyl radical in aqueous solution Buxton, G.V.;Greenstock, C.L.;Helman, W.P.;Ross, A.B. https://doi.org/10.1063/1.555805
  14. Reactivity of th hydroxyl radical in aqueous solution NSRDS-NBS-46 Leon, M. Dorfman;Gerald, E. Adams
  15. 水道協會雜誌 v.53 no.4 放射線.オソン倂用酸化法による水巾の 酸の 除法 新井英彦;宮田定次郎;新井陸正;作本彰久
  16. 대한환경공학회지 v.7 no.1 반회분식 반응기에서 오존산화에 의한 Cyanide와 Phenol의 제거정수 박영규;이철희;이봉도