کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4575488 1629555 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Competitive sorption of metal ions onto a north-eastern France soil. Isotherms and XAFS studies
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Competitive sorption of metal ions onto a north-eastern France soil. Isotherms and XAFS studies
چکیده انگلیسی

This paper reports on the sorption of Cu(II), Cr(III), and Zn(II) by a north-eastern France soil from single and ternary metal solutions, as a function of pH, time, and metal concentrations. Isothermal sorption batch experiments led to macroscopic and indirect results. The use of extended X-ray absorption fine structure (EXAFS) spectroscopy allowed us to obtain molecular scale information about the species and the structural environment of metals on the soil surface. The sorption capacities for single and ternary metal decreased in the order Cr3+ > Cu2+ > Zn2+. In absence of any interfering metals, the adsorption capacities were 0.22 mmol/g Cr3+, 0.21 mmol/g Cu2+, and 0.08 mmol/g Zn2+. In the case of ternary systems, a decrease in the sorbed amount of 40%, 60%, and 62% for chromium, copper, and zinc, respectively, was observed. EXAFS spectra underlined a metal sorption onto goethite–humate complexes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geoderma - Volume 139, Issues 1–2, 15 April 2007, Pages 180–189
نویسندگان
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