한국지하수토양환경학회:학술대회논문집 (Proceedings of the Korean Society of Soil and Groundwater Environment Conference)
- 한국지하수토양환경학회 2002년도 총회 및 춘계학술발표회
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- Pages.118-121
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- 2002
Redox Kinetics of Chromium(Ⅵ) in the Presence of Aquifer Materials Amended with Ferrous Iron
- Hwang, Inseong (En3 Col., Ltd) ;
- Batchelor, Bill (Civil Engineering Department, Texas A&M University, College Station, Texas, USA)
- 발행 : 2002.04.01
초록
The kinetics and stoichiometry of the reduction of hexavalent chromium (Cr(Ⅵ)) with ferrous iron (Fe(II)) were examined in systems with and without aquifer solids. Cr(Ⅵ) reduction was rapid in the absence of solids, but demonstrated slower and more complex kinetics in the presence of aquifer solids. The aquifer solids removed Fe(II) from solution and a portion of the reducing capacity of Fe(II) was transferred to the aquifer solids. The solid phases were then able to continue to remove Cr(Ⅵ). This suggests in-situ treatment of Cr(Ⅵ) by Fe(II) injection would be feasible in the aquifer environment. In general, re-oxidation of reduced chromium by molecular oxygen was not observed in our systems over time periods of nearly one year.