Model-Based Integration and Analysis of Biogeochemical and Isotopic Dynamics in a Nitrate-Polluted Pyritic Aquifer

Y.C. Zhang, H. Prommer, C.P. Slomp, H.P. Broers, B. van der Grift, H.F. Passier, J. Greskowiak, M.E. Boettcher, P. van Capellen

    Research output: Contribution to JournalArticleAcademicpeer-review

    Abstract

    Leaching of nitrate from agricultural land to groundwater and the resulting nitrate pollution are a major environmental problem worldwide. Its impact is often mitigated in aquifers hosting sufficiently reactive reductants that can promote autotrophic denitrification. In the case of pyrite acting as reductant, however, denitrification is associated with the release of sulfate and often also with the mobilization of trace metals (e.g., arsenic). In this study, reactive transport modeling was used to reconstruct, quantify and analyze the dynamics of the dominant biogeochemical processes in a nitrate-polluted pyrite-containing aquifer and its evolution over the last 50 years in response to changing agricultural practices. Model simulations were constrained by measured concentration depth profiles. Measured
    Original languageEnglish
    Pages (from-to)10415-10422
    JournalEnvironmental Science and Technology
    Volume47
    Issue number18
    DOIs
    Publication statusPublished - 2013

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