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BENTONITE AND ITS MODIFIED DERIVATES AS ADSORBENTS OF LEAD

Lenka Fusová

First published: 2011-06-20https://doi.org/10.5593/sgem2011/s20.107View metrics

Abstract

The main objective was to study the removal of lead cations from aqueous solutions by sorption onto bentonite and its modificati ons. Modification included natrification by NaCl and intercalation by octadecylamine (ODA) in two different weight ratios. The sorption isotherms were described using the Langmuir and Freundlich models. The adsorptive capacities of the or iginal bentonite increased af ter the intercalation of ODA. Adsorption of Pb ions, calculated by the La ngmuir model, yielded 97.15mg of Pb ions on 1g of bentonite (a sample intercalated by ODA in the weight ratio bentonite:ODA of 1:0.75). This sample was the most suitable for lead adsorp tion. The natrified sample also achieved better values of uptake capacity than the untreated bentonite, however, the contrast was not so obvious. The mechan isms of lead uptake are ion-exchange adsorption onto untreated bentonite and ion exchange plus Pb 2+ octadecylamine complexation on the modified bentonite.

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Publication details

Title
BENTONITE AND ITS MODIFIED DERIVATES AS ADSORBENTS OF LEAD
Authors
Lenka Fusová
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2011 11th International Multidisciplinary Scientific GeoConference
Publisher
Stef92 Technology
Year
2011
Pages
Not available yet
ISSN
1314-2704
ISBN
Not available yet
Language
en
Publication type
Conference Paper
Keywords
adsorptionbentonitemodificationsorption isothermlead
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