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Sorption kinetics of Pb2+, Cu2+ and Zn2+ ions by natural zeolites from Maramures County (northern Romania): potential application in wastewater reuse

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Author(s): Irina Smical

Journal: Aquaculture, Aquarium, Conservation & Legislation
ISSN 1844-8143

Volume: 4;
Issue: 4;
Start page: 481;
Date: 2011;
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Keywords: kinetics | natural zeolite tuff | adsorption | heavy metals | water reuse

ABSTRACT
The sorption kinetics of Pb2+, Cu2+ and Zn2+ ions by natural zeolite tuff from MaramureĊŸCounty (northern Romania) was studied using agitated batch laboratory apparatus at two temperaturelevels of 25 0C and 50 0C. The sorption kinetics of studied heavy metals ions by the natural zeolitic tuffwas established by fitting of experimental data using various models applied in the kinetic studies ofheavy metals sorption onto ions exchangers (pseudo-order 1, pseudo-order 2 and Weber-Morris). Fromall of these the best results were recorded for the pseudo-order 1 model use. The interaction betweenmetal ions and adsorbent surface is made on a single adsorption site and the adsorption mechanism isa diffusive one through the adsorbent pores.
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