Last data updates: 19 June 2015
Ho, Y.S. and McKay, G. (2002), Application of kinetic models to the sorption of copper(II) on to
peat. Adsorption Science & Technology, 20 (8), 797-815.
Document type: Article Language: English Cited References: 46 Times Cited: 110 Times self cited: 2
Abstract: A comparison of the kinetics of the sorption of copper(II) on to peat from aqueous
solution at various initial copper(II) concentrations and peat doses was made. The Elovich model
and the pseudo-second order model both provided a high degree of correlation with the
experimental data for most of the sorption process. There was a small discrepancy at the initial
stages of sorption which suggested that film diffusion or wetting of the peat may be involved in
the early part of the sorption process. Models evaluated included the fractional power equation,
the Elovich equation, the pseudo-first order equation and the pseudo second order equation. The
kinetics of sorption were followed based on the sorption capacity of copper(II) on peat at various
time intervals. Results show that chemical sorption processes may be rate-limiting in the sorption
of copper(II) on to peat during agitated batch contact time experiments. The rate constant, the
equilibrium sorption capacity and the initial sorption rate were calculated. From these parameters,
an empirical model for predicting the concentrations of metal ions sorbed was derived.
KeyWords Plus: Soil Organic-Matter, Humic-Acid, Aqueous-Solutions, Ion-Exchange,
Heavy-Metals, Adsorption, Removal, Carbon, Parameters, Kaolinite
Addresses:
McKay G, Hong Kong Univ Sci & Technol, Dept Chem Engn, Clear Water Bay, Kowloon, Hong
Kong, Peoples R China
Hong Kong Univ Sci & Technol, Dept Chem Engn, Kowloon, Hong Kong, Peoples R China
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