کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4574780 1332503 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Adsorption of dissolved organic carbon to mineral soils: A comparison of four isotherm approaches
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Adsorption of dissolved organic carbon to mineral soils: A comparison of four isotherm approaches
چکیده انگلیسی

The partitioning of dissolved organic carbon (DOC) within mineral soils is primarily controlled by adsorption to soil particle surfaces. We compare the theoretical limitations and modeling accuracy of four isotherm approaches to describe DOC partitioning to soil surfaces. We use 52 mineral soil samples to create linear initial mass (IM), non-linear, and Langmuir isotherms, all relating the initial solution concentration (Xi) to the amount of DOC adsorbed or released from soil surfaces. The Langmuir isotherm is also used with final concentration (Xf). The IM isotherm failed to meet theoretical assumptions and provided poor fits to experimental data. The non-linear and Langmuir Xi approaches had good fits to experimental data, and the Langmuir Xi approach had the most robust estimates of desorption capacity. Both Langmuir Xi and Xf isotherms hold the advantage of estimating the maximum adsorption capacity, yet the Xf isotherm is a better reflection of adsorption processes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geoderma - Volume 148, Issue 1, 30 November 2008, Pages 43–50
نویسندگان
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