Lead and Cadmium removal from aqueous solution using an industrial gypsum by-product

Abstract : The valorization of gypsum (by-product of phosphoric acid production) into useful product seems to be of important interest. In this study, the adsorption of lead (II) and cadmium (II) in an aqueous solution using both commercial gypsum (CG) and industrial gypsum by-product (IG) as adsorbents, has been investigated. The use of highly-purity CG allows the understanding of the adsorption phenomenon. The use of an IG as received from an industrial site allows the evaluation of its reactivity compared to pure CG. The adsorption experiments were carried out at ambient conditions for 24 h and the pH was recorded along the reaction. FTIR analyses were performed in order to examine the modification in the sulfate bound arrangement in the case of use of lead and/or cadmium. The obtained results have shown that the retention capacity of lead (II) and cadmium (II) by IG was similar that those obtained in the case of CG. However, gypsum by-product may be used as an alternative material to remove heavy metals in wastewaters. (C) 2014 The Authors. Published by Elsevier Ltd.
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Amalhay, M. SYMPHOS 2013 - 2ND INTERNATIONAL SYMPOSIUM ON INNOVATION AND TECHNOLOGY IN THE PHOSPHATE INDUSTRY, May 2013, Unknown, Unknown Region. 83, p. 415-422, 2014, Procedia Engineering. 〈http://www.sciencedirect.com/science/article/pii/S1877705814011436〉. 〈10.1016/j.proeng.2014.09.050〉
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https://hal.archives-ouvertes.fr/hal-01611990
Contributeur : Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Soumis le : vendredi 6 octobre 2017 - 13:32:35
Dernière modification le : jeudi 17 mai 2018 - 15:30:16

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Mohamed Raii, Doan Pham Minh, Francisco Javier Escudero Sanz, Ange Nzihou. Lead and Cadmium removal from aqueous solution using an industrial gypsum by-product. Amalhay, M. SYMPHOS 2013 - 2ND INTERNATIONAL SYMPOSIUM ON INNOVATION AND TECHNOLOGY IN THE PHOSPHATE INDUSTRY, May 2013, Unknown, Unknown Region. 83, p. 415-422, 2014, Procedia Engineering. 〈http://www.sciencedirect.com/science/article/pii/S1877705814011436〉. 〈10.1016/j.proeng.2014.09.050〉. 〈hal-01611990〉

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