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
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
As a new approach, Positron Emission Tomography (PET) was employed to analyze the flow field, using 18Fâ 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
Journal: Applied Geochemistry - Volume 98, November 2018, Pages 345-350
نویسندگان
Holger Lippold, Lotfollah Karimzadeh, Johannes Kulenkampff, Laurin Wissmeier, Christin Stuhlfauth, Madeleine Stoll, Johanna Lippmann-Pipke,