DBPapers
DOI: 10.5593/sgem2017/52/S20.028

CONGO RED REMOVAL FROM WATER BY ZNAL-LDH OBTAINED FROM ZINC ASH

L. Lupa, A. Golban, L. Cocheci, R. Pode
Wednesday 13 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7408-09-6 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 52, 209-216 pp, DOI: 10.5593/sgem2017/52/S20.028

ABSTRACT

The aim of this work is the study of Congo Red removal from water by adsorption onto Zn4Al-CO3 type layered double hydroxide prepared from zinc ash. The preparation consist in dissolution of zinc ash with hydrochloric acid followed by synthesis of LDH by co-precipitation of zinc chloride with aluminum salt in alkaline media. The prepared LDH and the calcined product were utilized as adsorbents of azo dye Congo Red from water. Despite that the materials were prepared from a waste, their performances as adsorbents are comparative with other similar materials prepared from analytical grade reagents. The structural analysis of the materials after Congo Red uptake reveals that the adsorption process appeared to be surface adsorption.

Keywords: adsorption, dye, layered double hydroxide, zinc ash