A Tiered Approach of Washing and Stabilization to Decontaminate and Recycle Dredged River Sediment

세척과 안정화기술을 적용한 오염 준설토의 처리 및 재활용 시스템 개발

  • Kim, Young-Jin (Department of Civil and Environmental Engineering, Seoul National University) ;
  • Nam, Kyoung-Phile (Department of Civil and Environmental Engineering, Seoul National University) ;
  • Lee, Seung-Bae (Department of Civil and Environmental Engineering, Seoul National University) ;
  • Kim, Byeong-Kyu (Research & Development Center, Halla Engineering & Construction Corp.) ;
  • Kwon, Young-Ho (Research & Development Center, Halla Engineering & Construction Corp.) ;
  • Hwang, In-Seong (Department of Environmental Engineering, Pusan National University)
  • 김영진 (서울대학교 건설환경공학부) ;
  • 남경필 (서울대학교 건설환경공학부) ;
  • 이승배 (서울대학교 건설환경공학부) ;
  • 김병규 (한라건설 기술연구소) ;
  • 권영호 (한라건설 기술연구소) ;
  • 황인성 (부산대학교 사회환경시스템공학부)
  • Received : 2010.03.10
  • Accepted : 2010.04.27
  • Published : 2010.04.30

Abstract

Although the demands for the dredging work have been increasing due to social and industrial reasons including national plan for restoration of four major rivers, environmental standards or management guidelines for the dredged river sediment are limited. The suggested environmental standard for the beneficial use of dredged river sediment consists of two levels, recyclable and concern, and includes eight contaminants such as metals and organic contaminants. The systematic approach to remediate dredged river sediment is also suggested. The system consists of both washing and stabilization processes with continuous multi particle separation. In the early stage, the sediments are separated into two particle sizes. The coarse-grained sediment over 0.075 mm, generally decontaminated with less trouble, follows normal washing steps and is sent for recycling. The fine-grained sediments under 0.075 mm are separated again at 0.025 mm. The particles bigger than this second separation point are treated in two ways, advanced washing for highly contaminated sediments and stabilization for less. The lab test results show that birnessite and apatite are most effective stabilizing agents among tested for Cd and Pb. The most fine residues, down-sized by continuous particle separation, are finally sent for disposal. The system is tested for metals in this study, but is expected to be effective for organic contaminants included in the environmental standard, such as PAH and PCE. The feasibility test on the field site will be followed.

Keywords

References

  1. 국토해양부, 2009, 4대강살리기 마스터플랜.
  2. 김건하, 정우혁, 2007, 오염퇴적물 관리방향 및 처리공법, 지하수토양환경, 12(3), 1-9.
  3. 박준범 ,김세종, 2007, 국내 오염퇴적토사 준설의 현황, 대한토목학회지, 55(4), 58-65.
  4. 박준범, 김세종, 2007, 해상 오염준설토사의 처리, 처분 및 재활용 방안, 대한토목학회지, 55(4), 66-74.
  5. 신원식, 김좌관, 이남주, 김영훈, 황인성, 2006, 낙동강 및 호소퇴적물이 수체에 미치는 영향, 낙동강물환경연구소
  6. 윤길림, 이찬원, 정우섭, 2008, 준설토 유효활용을 위한 한국형 환경기준개발, 한국지반공학회논문집, 24(5), 5-13.
  7. 이창희, 유혜진, 1998, 호소 및 하천 오염퇴적물 관리방안, 한국환경정책.평가연구원.
  8. 이창희, 유혜진, 2000, 수저퇴적물 환경기준 개발에 관한 연구, 한국환경정책.평가연구원.
  9. 황경엽, 박성열, 정제호, 김영훈, 백원석, 신원식, 이남주, 황인성, 2007, 낙동강 퇴적물 내 중금속존재 형태 및 용출가능성, 상하수도학회지, 21(1), 113-122.
  10. 환경부, 2009, 토양보전기본계획.
  11. 환경부, 2007, 폐기물관리법.
  12. Detzner, H.D., Strom, Hafenbau, 1995, The Hamburg Project METHA: large scale separation, dewateringand reuse of polluted sediments, European Water Pollution Control, 5(5), 38-42.
  13. DGE, 2002, Dutch-German Exchange on Dredged Material - Part 2 Treatment and Confined Disposal of Dredged Material.
  14. Lee, S., An, J. Kim, Y-J., and Nam, K., 2009, Bìmessite as an immobilizing agent in heavy metals contaminated sediments, SETAC Conference, New Orleans, LA, USA, p. 19-23.
  15. NOAA, 1999, Sediment Quality Guìdelines Developed for the National Status and Trends Program.
  16. Palermo, M.R., Schroeder, P.R., Estes, T.J., and Francingues, N.R., 2008, Technical Guidelines for Enviromnental Dredging of Contaminated Sediments, U.S. Army Engineer Research and Development Center, Vìcksburg, MS, ERDC/EL TR-08-29.
  17. Tessier, A., Campbell, P.G.C., and Bisson, M., 1979, Sequential extraction procedure for the speciation of particulate trace metal, Anal chem, 51(7), 844-850. https://doi.org/10.1021/ac50043a017
  18. US Federal Register, 1973, Ocean dumping: Final regulations and criteria, 38(198).
  19. USACE, 2000, Dredging and dredged materials disposal, US Army Corps Engineers, Washington, DC., EMI110-2-5025.
  20. USEPA, 1998, EPA's Contaminated Sediment Management Strategy, USEPA, Office of Water, Washington DC, EPA 823/R-98/001.
  21. USEPA, 2005, Contaminated Sediment Remedìation Guidance for Hazardous Waste Sites, USEPA, Office of Solid Waste and Emergency Response, Washington DC, EPA-540-R-05-012.
  22. Wenning, R.J., Stern, E.A., Jones, K.W., and Douglas, W.S., 2001, The WDRA program and emerging decontamination technologies for contaminated sediments, Contaminated Soil Sediment and Water.