• Temperature Effects on the Persulfate Oxidation of Low Volatile Organic Compounds in Fine Soils
  • Jeong, Kwon;Kim, Do-Gun;Han, Dai-Sung;Ko, Seok-Oh;
  • Department of Civil Engineering, Kyunghee University;Department of Civil Engineering, Kyunghee University;Department of Civil Engineering, Kyunghee University;Department of Civil Engineering, Kyunghee University;
  • 과황산나트륨 산화에 의한 토양내 저휘발성 유기오염물 제거 시 온도의 영향 평가
  • 정권;김도군;한대성;고석오;
  • 경희대학교 토목공학과;경희대학교 토목공학과;경희대학교 토목공학과;경희대학교 토목공학과;
Abstract
Batch tests were carried out to evaluate the thermal treatment of low volatile organic compounds in low-permeability soil. The chemical oxidation by sodium persulfate catalyzed by heat and Fe (II) was evaluated. Enhanced persulfate oxidation of n-decane (C-10), n-dodecane (C-12), n-tetradecane (C-14), n-hexadecane (C-16), and phenanthrene was observed with thermal catalyst, indicating increased sulfate radical production. Slight enhancement of the pollutants oxidation was observed when initial sodium persulfate concentration increased from 5 to 50 g/L. However, the removal efficiency greatly decreased as soil/water ratio increased. It indicates that mass transfer of the pollutants as well as the contact between the pollutants and sulfate radical were inhibited in the presence of solids. In addition, more pollutants can be adsorbed on soil particles and soil oxidant demand increased when soil/water ratio becomes higher. The oxidation of the pollutants was significantly improved when catalyzed by Fe(II). The sodium persulfate consumption increased at the same time because the residual Fe(II) acts as the sulfate radical scavenger.

Keywords: Low volatile organic compounds;Sulfate radical;In-situ oxidation;Catalyst;

References
  • 1. 구청완, 고석오, 2005, 토양내 저휘발성 유류오염물 제거를 위한 고온공기 주입/추출 기술 연구, 지하수토양환경, 10(1), 6-12.
  •  
  • 2. 윤여복, 고석오, 박기호, 박민호, 2006, 전기 저항열을 이용한 유류 오염토 복원공정 적용을 위한 토양의 가열특성 연구, 지하수토양환경, 11(1), 45-53(2006).
  •  
  • 3. Anipsitakis, G.P. and Dionysiou, D.D., 2004, Radical generation by the interaction of transition metals with common oxidants, Environ. Sci. Technol., 38, 3705-3712.
  •  
  • 4. Block, P.A., Brown, R.A., and Robinson, D., 2004, Novel activation technologies for sodium persulfate in situ chemical oxidation, Proceedings of the Fourth International Conference on the Remediation of Chlorinated and Recalcitrant Compounds. California, U.S.A.
  •  
  • 5. Brown, R.A., 2003, In situ chemical oxidation: Performance, practice, and pitfalls, AFCEE Technology Transfer Workshop. San Antonio, TX, U.S.A.
  •  
  • 6. Dahmani, M.A., Huang, K., and Hoag, G.E., 2006, Sodium persulfate oxidation for the remediation of chlorinated solvents (USEPA Superfund Innovative Technology Evaluation Program), Water, Air, & Soil Pollution, 6(1/2), 127-141.
  •  
  • 7. Huling, S.G. and Pivetz, B.E., 2006, In-Situ Chemical Oxidation, EPA/600/R-06/072, Office of Research and Development, National Risk Management Research Laboratory, U.S. EPA.
  •  
  • 8. Liang, C., Huang, C.F., Mohanty, N., Lu, C.J., and Kurakalva, R.M., 2007, Hydroxypropyl-${\beta}$-cyclodextrin-mediated iron-activated persulfate oxidation of trichloroethylene and tetrachloroethylene, Ind. Eng. Chem. Res., 46(20), 6466-6479.
  •  
  • 9. Liang C., Lee, I.-L., Hsu, I.-Y., Liang, C.-P., and Lin, Y.-L., 2008, Persulfate oxidation of trichloroethylene with and without iron activation in porous media, Chemosphere, 70, 426-435.
  •  

This Article