Adsorption of Pb(II), Zn(II) and Cr(III) on coal fly ash porous pellets

Papandreou, AD; Stournaras, CJ; Panias, D; Paspaliaris, I

dc.contributor.author	Papandreou, AD	en
dc.contributor.author	Stournaras, CJ	en
dc.contributor.author	Panias, D	en
dc.contributor.author	Paspaliaris, I	en
dc.date.accessioned	2014-03-01T01:35:04Z
dc.date.available	2014-03-01T01:35:04Z
dc.date.issued	2011	en
dc.identifier.issn	0892-6875	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20960
dc.subject	Adsorption	en
dc.subject	Adsorption isotherms	en
dc.subject	Desorption	en
dc.subject	Fly ash	en
dc.subject	Heavy metals removal	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Mineralogy	en
dc.subject.classification	Mining & Mineral Processing	en
dc.subject.other	Adsorption capacities	en
dc.subject.other	Adsorption of pb	en
dc.subject.other	Antagonistic effects	en
dc.subject.other	Chromium ions	en
dc.subject.other	Coal fly ash	en
dc.subject.other	Coal-burning power plants	en
dc.subject.other	Kinetic study	en
dc.subject.other	Laboratory scale	en
dc.subject.other	Langmuir equation	en
dc.subject.other	Leaching test	en
dc.subject.other	Metal concentrations	en
dc.subject.other	Porous pellets	en
dc.subject.other	Pseudo-second order model	en
dc.subject.other	Raw fly ashes	en
dc.subject.other	Solution pH	en
dc.subject.other	Spherical agglomerates	en
dc.subject.other	Adsorption	en
dc.subject.other	Adsorption isotherms	en
dc.subject.other	Agglomeration	en
dc.subject.other	Chromium	en
dc.subject.other	Chromium compounds	en
dc.subject.other	Coal ash	en
dc.subject.other	Concrete blocks	en
dc.subject.other	Desorption	en
dc.subject.other	Dyes	en
dc.subject.other	Fly ash	en
dc.subject.other	Leaching	en
dc.subject.other	Lead	en
dc.subject.other	Metals	en
dc.subject.other	Pelletizing	en
dc.subject.other	Stabilization	en
dc.subject.other	Zinc	en
dc.subject.other	Zinc compounds	en
dc.subject.other	Ore pellets	en
dc.title	Adsorption of Pb(II), Zn(II) and Cr(III) on coal fly ash porous pellets	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.mineng.2011.07.016	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.mineng.2011.07.016	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	In the present work the application of fly ash porous pellets as adsorbent of lead(II), zinc(II) and chromium(III) ions from aqueous solution was studied. Experiments were carried out using porous pellets developed from fly ash derived from Megalopolis, Greece coal-burning power plant. The material was shaped into spherical agglomerates, after wetting and tumbling in a laboratory scale granulator. The adsorption of heavy metals on fly ash pellets was studied as a function of the initial metal concentration, solution pH and temperature. Kinetic studies indicated that sorption follows a pseudo-second-order model. Adsorption isotherms of lead, zinc and chromium were determined for agglomerated material using the Langmuir equation. The adsorption capacity of fly ash pellets reached at 0.22 mmol Pb/g pellet, 0.27 mmol Zn/g pellet and 0.44 mmol Cr/g pellet. Furthermore adsorption from bimetallic solutions (Cr-Zn. Cr-Pb and Pb-Zn) took place in order to study presumable antagonistic effects on adsorption of heavy metals. Finally, the stabilization of metal saturated pellets was studied. The stabilization procedure took place in structures made of concrete, where 75% of cement was replaced by raw fly ash. The evaluation of the procedure through leaching tests showed excellent heavy metals stabilization in concrete blocks. (C) 2011 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Minerals Engineering	en
dc.identifier.doi	10.1016/j.mineng.2011.07.016	en
dc.identifier.isi	ISI:000296670600014	en
dc.identifier.volume	24	en
dc.identifier.issue	13	en
dc.identifier.spage	1495	en
dc.identifier.epage	1501	en