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DOI: 10.5593/sgem2017/11/S04.097

ASSESSMENT OF HEAVY METALS LEACHING FROM DIFFERENT TYPES OF WASTE MIXED WITH MOLASSES

O.C. Modoi ,N. Ajtai, C. Roba, C. Ciobotariu, T. Mihaiescu
Tuesday 12 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7105-98-8 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 11, 767-772 pp, DOI: 10.5593/sgem2017/11/S04.097

ABSTRACT

In the present study it was evaluated the capacity of molasses for removing seven metals (Fe, Zn, Cu, Cd, Cr, Pb, and Ni) from three types of waste: galvanic sludge (pH = 7.1 – 7.8), mineral residue from a lead metallurgical plant (pH = 5.0 – 5.8) from Baia Mare (Romania), and tailing pond residue from Aurul - Baia Mare (pH = 2.1 – 3.0). Several leaching tests were conducted in the laboratory in order to investigate the influence of molasses concentrations (0 %, 1%, 5%, 10%) on heavy metal leaching. It was observed that the heavy metal concentration in the leachate followed the sequence Fe > Cu > Ni > Pb > Zn > Cd > Cr, and the metals concentration increased with molasses concentration. The results showed that the sugar acids from molasses can be used as possible effective agents for the remediation of heavy metals contaminated residues.

Keywords: heavy metals, wastes, molasses, recovery, leachate

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