Proceedings of the Korean Society of Soil and Groundwater Environment Conference (한국지하수토양환경학회:학술대회논문집)

Korean Society of Soil and Groundwater Environment (한국지하수토양환경학회)
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Sources and Behaviors of Nitrate and Sulfate in Riverside Alluvial Aquifer

  • Choi Byoung-Young (Department of Earth and Environmental Sciences and the Environmental Geosphere Research Laboratory (EGRL), Korea University) ;
  • Yun Seong-Taek (Department of Earth and Environmental Sciences and the Environmental Geosphere Research Laboratory (EGRL), Korea University) ;
  • Kim Kyoung-Ho (Department of Earth and Environmental Sciences and the Environmental Geosphere Research Laboratory (EGRL), Korea University) ;
  • Kim Kang-Joo (School of Civil and Environmental Engineering, Kunsan National University)
  • Published : 2005.10.01
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Abstract

The ${\delta}^{15}N\;and\;{\delta}^{15}O$ data of nitrate indicates the sources of nitrate in oxic groundwater as a mixture of ammonia or urea-containing fertilizer and manure. The ${\delta}^{34}S_{sulfate}$ values indicate that sulfate Is mainly originated from fertilizers and soil S. In sub-oxic groundwater, the increased ${\delta}^{34}S_{sulfate}$ values evidently indicate that sulfate is gradually removed by microbial mediated sulfate reduction. However, iron reduction does not occur In this study area. Such a reversed redox sequence may occur In the presence of stable iron oxides such as hematite and goethite in alluvlal aquifer.

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