Removal of Cu(II) in fixed bed and batch reactors using natural zeolite and exfoliated vermiculite as adsorbents

Stylianou, MA; Inglezakis, VJ; Moustakas, KG; Malamis, SPh; Loizidou, MD

dc.contributor.author	Stylianou, MA	en
dc.contributor.author	Inglezakis, VJ	en
dc.contributor.author	Moustakas, KG	en
dc.contributor.author	Malamis, SPh	en
dc.contributor.author	Loizidou, MD	en
dc.date.accessioned	2014-03-01T01:27:03Z
dc.date.available	2014-03-01T01:27:03Z
dc.date.issued	2007	en
dc.identifier.issn	0011-9164	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18322
dc.subject	Clinoptilolite	en
dc.subject	Copper	en
dc.subject	Ion exchange	en
dc.subject	Vermiculite	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Water Resources	en
dc.subject.other	Adsorbents	en
dc.subject.other	Copper	en
dc.subject.other	Ion exchange	en
dc.subject.other	Particle size	en
dc.subject.other	pH effects	en
dc.subject.other	Removal	en
dc.subject.other	Solutions	en
dc.subject.other	Thermal effects	en
dc.subject.other	Zeolites	en
dc.subject.other	Agitation	en
dc.subject.other	Exfoliated vermiculite	en
dc.subject.other	Fixed bed reactors	en
dc.subject.other	Natural zeolite	en
dc.subject.other	Batch reactors	en
dc.subject.other	Adsorbents	en
dc.subject.other	Batch reactors	en
dc.subject.other	Copper	en
dc.subject.other	Ion exchange	en
dc.subject.other	Particle size	en
dc.subject.other	pH effects	en
dc.subject.other	Removal	en
dc.subject.other	Solutions	en
dc.subject.other	Thermal effects	en
dc.subject.other	Zeolites	en
dc.subject.other	aqueous solution	en
dc.subject.other	clinoptilolite	en
dc.subject.other	copper	en
dc.subject.other	ion exchange	en
dc.subject.other	vermiculite	en
dc.title	Removal of Cu(II) in fixed bed and batch reactors using natural zeolite and exfoliated vermiculite as adsorbents	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.desal.2006.10.031	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.desal.2006.10.031	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	The ability of natural zeolite (clinoptilolite) and exfoliated vermiculite to remove copper from aqueous solutions was studied in fixed bed column and batch reactors. The effect of agitation speed (0, 100, 200, 400 rpm), temperature (25, 45, 60°C), and particle size [2.5-5.0 mm, dust (<0.25 mm)] and solution pH (1.00-4.00) on the removal of heavy metals was studied. Fixed bed experiments were conducted, using three different volumetric flow rates of 5-7-10BV (Bed Volumes)/h, under an initial normality of 0.01 N (317.7 mg/L), at initial pH of 4.00 and ambient temperature (25°C). Vermiculite was found to be more effective for the removal of copper in batch mode reactors under all the tested conditions, while the removal efficiency follows the order: vermiculite > clinoptilolite dust > clinoptilolite 2.5-5.0 mm. The removal of Cu(II) using vermiculite reached 67.6%, at ambient temperature and at the agitation speed of 400 rpm, while it was approximately 42.5% at 60°C with no agitation. The highest removal level in the case of clinoptilolite use reached the percentage of 37.3% at the temperature of 60°C without agitation; the same removal efficiency was obtained at ambient conditions with an agitation speed of 400 rpm. Clinoptilolite dust is found to be more efficient than granular clinoptilolite under all the conditions that were tested. Agitation and temperature also affect the uptake of the specific ions. Finally, the acidity of the aqueous solution influences the removal of copper by minerals. In column studies, the decrease of the flow rate resulted in the increase of the removal efficiency. © 2007 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Desalination	en
dc.identifier.doi	10.1016/j.desal.2006.10.031	en
dc.identifier.isi	ISI:000250040800016	en
dc.identifier.volume	215	en
dc.identifier.issue	1-3	en
dc.identifier.spage	133	en
dc.identifier.epage	142	en