Modeling Adsorption-Desorption Processes of Cd on Montmorillonite
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چکیده
منابع مشابه
Modeling adsorption-desorption processes of Cu on edge and planar sites of montmorillonite.
The effect of the ionic strength on adsorption of Cu on calcium montmorillonite was studied at concentrations ranging from 31 to 516 microM. An adsorption model was employed in the analysis of the data. When the background electrolyte was NaClO4, the ionic exchange was suppressed at 0.5 M concentration, and Cu adsorption took place on edge sites, reaching a plateau at about 24 mmol/kg. A furthe...
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T O M Á S U N D A B E Y T I A , * , † S H L O M O N I R , † T A M A R A P O L U B E S O V A , † G I O R A R Y T W O , † , ‡ E S M E R A L D A M O R I L L O , § A N D C E L I A M A Q U E D A § Seagram Center for Soil and Water Sciences, Faculty of Agricultural, Food and Environmental Quality Sciences, P.O. Box 12, Rehovot 76100, Israel, Tel Hai Academic College, Upper Galilee, 12210 Israel, and ...
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for the equilibrium properties is obtained. The coverage near saturation depends logarithmically on the ratio between the adsorption rate, k+, and the desorption rate, k−, ρeq ∼= 1− 1/ log(k+/k−), when k+/k− 1. A time dependent version of the reversible problem with immediate adsorption (k+ = ∞) is also considered. Both heuristic arguments and numerical simulations reveal a logarithmically slow...
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The rate of reaction of trace metals between soils and solutions is important in predicting trace metal behavior as equilibrium may not be attained. Although chemical equilibrium models are commonly used for soil systems, there has been less progress in developing predictive kinetic models. Kinetics of Zn adsorption/desorption have been modeled based on the linear adsorption isotherm assumption...
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ژورنال
عنوان ژورنال: Clays and Clay Minerals
سال: 1998
ISSN: 0009-8604
DOI: 10.1346/ccmn.1998.0460406