کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4578666 1630069 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of nitrate attenuation characterization methods at the Uranium mill tailing site in Monument Valley, Arizona
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Comparison of nitrate attenuation characterization methods at the Uranium mill tailing site in Monument Valley, Arizona
چکیده انگلیسی
Several methods for characterizing the occurrence and rate of nitrate attenuation were tested at a field site near Monument Valley, Arizona. Spatial and temporal nitrate concentration data collected from a transect of monitoring wells located along the plume centerline were analyzed to evaluate the overall rates of natural attenuation. The occurrence and rate of denitrification was evaluated through microcosm experiments, nitrogen isotopic fractionation analysis, and solute-transport modeling. First-order denitrification-rate coefficients calculated with each method were comparable. In addition, the composite natural attenuation rate coefficient was similar to the denitrification-rate coefficients, which suggests that microbially induced decay primarily controls nitrate attenuation at the site. This research highlights the benefits associated with a multiple-method approach for the characterization of natural attenuation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hydrology - Volume 378, Issues 1–2, 15 November 2009, Pages 72-81
نویسندگان
, , , , ,