Econ. Environ. Geol. 2013; 46(1): 39-50

Published online February 28, 2013

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Characteristics of Fe Reduction Process of Shallow Groundwater in a Reclaimed Area, Kim-je

Ji-Hoon Kim1, Tae-Jin Cheong1, Jong-Sik Ryu2 and Rak-Hyeon Kim3*

1Petroleum and Marine Research Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, 305-350, Korea
2Division of Earth and Environmental Sciences, Korea Basic Science Institute, Chungbuk, 363-883, Korea
3Department of Soil and Groundwater, Environmental Management Corporation, Incheon, 404-708, Korea

Correspondence to :

Rak-Hyeon Kim

acezeta@korea.com

Received: March 22, 2012; Accepted: February 15, 2013

Abstract

The study area is located on the western coastal region of Korea, partly had been reclaimed lands. Groundwaters of the coastal area show lower Eh and DO values (Eh: 0.57 V→0.13 V, DO; 9.7 mg/l→1.3 mg/l), and higher Fe concentrations (> 20 mg/l) than those of the inner land (< 0.3 mg/l), indicating that the redox condition of groundwater changes from oxic into suboxic/anoxic conditions as it flows from the inland toward the coastal area. In addition, Fe speciation of groundwater from the coastal area demonstrates that the most dissolved Fe exist as Fe2+, reflecting that groundwater is under the anoxic condition to sufficiently occur Fe reduction. According to the result of Fe extraction with the sediment samples from three wells (A, B, C), the sediments provide enough Fe3+ to occur the Fe reduction in the groundwater. Integrated all results of the groundwater and sediment, we infer that the Fe reduction to occur in groundwater is associated with the reclamation processes of the study area.

Keywords reclaimed lands, groundwater, suboxic/anoxic conditions, Fe speciation

Article

Econ. Environ. Geol. 2013; 46(1): 39-50

Published online February 28, 2013

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Characteristics of Fe Reduction Process of Shallow Groundwater in a Reclaimed Area, Kim-je

Ji-Hoon Kim1, Tae-Jin Cheong1, Jong-Sik Ryu2 and Rak-Hyeon Kim3*

1Petroleum and Marine Research Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, 305-350, Korea
2Division of Earth and Environmental Sciences, Korea Basic Science Institute, Chungbuk, 363-883, Korea
3Department of Soil and Groundwater, Environmental Management Corporation, Incheon, 404-708, Korea

Correspondence to:

Rak-Hyeon Kim

acezeta@korea.com

Received: March 22, 2012; Accepted: February 15, 2013

Abstract

The study area is located on the western coastal region of Korea, partly had been reclaimed lands. Groundwaters of the coastal area show lower Eh and DO values (Eh: 0.57 V→0.13 V, DO; 9.7 mg/l→1.3 mg/l), and higher Fe concentrations (> 20 mg/l) than those of the inner land (< 0.3 mg/l), indicating that the redox condition of groundwater changes from oxic into suboxic/anoxic conditions as it flows from the inland toward the coastal area. In addition, Fe speciation of groundwater from the coastal area demonstrates that the most dissolved Fe exist as Fe2+, reflecting that groundwater is under the anoxic condition to sufficiently occur Fe reduction. According to the result of Fe extraction with the sediment samples from three wells (A, B, C), the sediments provide enough Fe3+ to occur the Fe reduction in the groundwater. Integrated all results of the groundwater and sediment, we infer that the Fe reduction to occur in groundwater is associated with the reclamation processes of the study area.

Keywords reclaimed lands, groundwater, suboxic/anoxic conditions, Fe speciation

    KSEEG
    Apr 30, 2024 Vol.57 No.2, pp. 107~280

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