Title: Sorption of heavy metals by modified chelating ion exchangers

Authors: Valentin Nenov, Bogdan Bonev

Addresses: Department of Water Treatment, University ''Prof. As. Zlatarov'' Bourgas, bul. ''prof. Jakimov'' N1, Bourgas 8010, Bulgaria. ' Department of Water Technology Inorganic Technology and Silica, University ''Prof . As. Zlatarov'' Bourgas, bul. ''prof. Jakimov'' N1, Bourgas 8010, Bulgaria

Abstract: Satisfactory sorption capacity towards heavy metals of several physically modified chelating resins at low pH is reported. It was found that the linear sorption isotherms are the most appropriate for describing the sorption of Ni and Pb. The data obtained revealed that the chelating resins studied are able to remove selectively copper from a complex synthetic solution containing Fe, Mn and Pb. The regeneration of Lewatit TP 208 by 10% H2SO4 in batch conditions proved to be effective through three consecutive runs of loading-regeneration.

Keywords: heavy metals; linear sorption isotherms; ion exchangers; modified chelating resins; adsorption; nickel; lead; copper.

DOI: 10.1504/IJETM.2010.031538

International Journal of Environmental Technology and Management, 2010 Vol.12 No.2/3/4, pp.343 - 358

Published online: 10 Feb 2010 *

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