Sources and biogeochemical behavior of nitrate and sulfate in an alluvial aquifer: Hydrochemical and stable isotope approaches
DC Field | Value | Language |
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dc.contributor.author | Choi, Byoung-Young | - |
dc.contributor.author | Yun, Seong-Taek | - |
dc.contributor.author | Mayer, Bernhard | - |
dc.contributor.author | Kim, Kyoung-Ho | - |
dc.date.accessioned | 2021-09-07T10:55:25Z | - |
dc.date.available | 2021-09-07T10:55:25Z | - |
dc.date.created | 2021-06-18 | - |
dc.date.issued | 2011-07 | - |
dc.identifier.issn | 0883-2927 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/112054 | - |
dc.description.abstract | Based on hydrochemical and environmental isotope data (delta N-18 and delta O-18 of NO3-, and delta S-34 of SO42-) of depth-specific groundwater samples from multi-level samplers, the source(s) and biogeochemical behavior of NO3- and SO42- in a shallow (<25 m below ground level) sandy alluvial aquifer underneath a riverside agricultural area in South Korea were evaluated. The groundwater in the study area was characterized by a large variability in the concentrations of NO3- (0.02 to similar to 35 mg/L NO3-N) and SO42- (0.14 to similar to 130 mg/L). A distinct vertical redox zoning was observed sub-dividing an oxic groundwater at shallow depths (<8-10 m below ground surface) from sub-oxic groundwater at greater depths. The delta N-15 and delta O-18 values indicated that elevated NO3- concentrations in the oxic groundwater are due to manure-derived NO3- and nitrification of urea- and ammonia-containing fertilizers used on agricultural fields. Chemical and isotopic data also revealed that groundwater NO3- concentrations significantly decrease due to denitrification in the lower oxic and sub-oxic groundwater. The delta S-34(sulfate) values of the oxic groundwater ranged from -14.4 parts per thousand to +2.4 parts per thousand. The relationship between delta S-34(sulfate) values and SO42- concentrations with depth showed that increasing SO42- concentrations were caused by S-bearing fertilizers, not pyrite oxidation. Bacterial (dissimilatory) SO42- reduction occurred locally in the sub-oxic groundwater, as indicated by increasing delta S-34(sulfate) values (up to 64.1 parts per thousand) with concomitant decreases of SO42- concentrations. This study shows that isotope data are very effective for discriminating different sources for the waters with high SO42- and low NO3- concentrations in the lower oxic zone. It is also suggested that the use of N- and S-containing fertilizers should be better controlled to limit nitrate and SO42- contamination of shallow groundwater. (C) 2011 Elsevier Ltd. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.subject | AGRICULTURAL AREA | - |
dc.subject | WATER CHEMISTRY | - |
dc.subject | FERTILIZER CHARACTERIZATION | - |
dc.subject | GROUNDWATER RECHARGE | - |
dc.subject | DISSOLVED SULFATE | - |
dc.subject | SCHIST AQUIFER | - |
dc.subject | NITROGEN | - |
dc.subject | SULFUR | - |
dc.subject | DENITRIFICATION | - |
dc.subject | OXYGEN | - |
dc.title | Sources and biogeochemical behavior of nitrate and sulfate in an alluvial aquifer: Hydrochemical and stable isotope approaches | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Choi, Byoung-Young | - |
dc.contributor.affiliatedAuthor | Yun, Seong-Taek | - |
dc.contributor.affiliatedAuthor | Kim, Kyoung-Ho | - |
dc.identifier.doi | 10.1016/j.apgeochem.2011.04.015 | - |
dc.identifier.scopusid | 2-s2.0-79956261472 | - |
dc.identifier.wosid | 000292118400019 | - |
dc.identifier.bibliographicCitation | APPLIED GEOCHEMISTRY, v.26, no.7, pp.1249 - 1260 | - |
dc.relation.isPartOf | APPLIED GEOCHEMISTRY | - |
dc.citation.title | APPLIED GEOCHEMISTRY | - |
dc.citation.volume | 26 | - |
dc.citation.number | 7 | - |
dc.citation.startPage | 1249 | - |
dc.citation.endPage | 1260 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Geochemistry & Geophysics | - |
dc.relation.journalWebOfScienceCategory | Geochemistry & Geophysics | - |
dc.subject.keywordPlus | AGRICULTURAL AREA | - |
dc.subject.keywordPlus | WATER CHEMISTRY | - |
dc.subject.keywordPlus | FERTILIZER CHARACTERIZATION | - |
dc.subject.keywordPlus | GROUNDWATER RECHARGE | - |
dc.subject.keywordPlus | DISSOLVED SULFATE | - |
dc.subject.keywordPlus | SCHIST AQUIFER | - |
dc.subject.keywordPlus | NITROGEN | - |
dc.subject.keywordPlus | SULFUR | - |
dc.subject.keywordPlus | DENITRIFICATION | - |
dc.subject.keywordPlus | OXYGEN | - |
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