کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11025071 1701032 2018 28 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of pH on the mobility of the herbicide MCPA in a sand-goethite column: 1D and 2D reactive transport modeling
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
Effect of pH on the mobility of the herbicide MCPA in a sand-goethite column: 1D and 2D reactive transport modeling
چکیده انگلیسی
As a new approach, Positron Emission Tomography (PET) was employed to analyze the flow field, using 18F− as a radiotracer. The observed heterogeneity was reproduced in 2D simulations assuming increased permeability and porosity at the periphery of the column. With this flow model, predicted retardation factors for MCPA were in agreement with the experimental data. Thus, this study demonstrates quantitatively that inconsistencies between static (batch) and dynamic (column) systems can be caused by heterogeneities in fluid flow, i.e., not necessarily by non-equilibrium conditions, which are commonly taken into account. This in turn highlights the need to consider realistic flow fields in studies of contaminant transport in natural matrices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Geochemistry - Volume 98, November 2018, Pages 345-350
نویسندگان
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