Removal of Pb(II) from aqueous solutions by using clinoptilolite and bentonite as adsorbents

Inglezakis, VJ; Stylianou, MA; Gkantzou, D; Loizidou, MD

dc.contributor.author	Inglezakis, VJ	en
dc.contributor.author	Stylianou, MA	en
dc.contributor.author	Gkantzou, D	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/123456789/18324
dc.subject	Bentonite	en
dc.subject	Clinoptilolite	en
dc.subject	Ion exchange	en
dc.subject	Lead	en
dc.subject	Zeolites	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Water Resources	en
dc.subject.other	Acidity	en
dc.subject.other	Adsorbents	en
dc.subject.other	Adsorption	en
dc.subject.other	Batch reactors	en
dc.subject.other	Bentonite	en
dc.subject.other	Ion exchange	en
dc.subject.other	Zeolites	en
dc.subject.other	Agitation	en
dc.subject.other	Clinoptilolite	en
dc.subject.other	Lead removal (water treatment)	en
dc.subject.other	Acidity	en
dc.subject.other	Adsorbents	en
dc.subject.other	Adsorption	en
dc.subject.other	Batch reactors	en
dc.subject.other	Bentonite	en
dc.subject.other	Ion exchange	en
dc.subject.other	Lead removal (water treatment)	en
dc.subject.other	Zeolites	en
dc.subject.other	acidity	en
dc.subject.other	adsorption	en
dc.subject.other	aqueous solution	en
dc.subject.other	bentonite	en
dc.subject.other	clinoptilolite	en
dc.subject.other	lead	en
dc.subject.other	particle size	en
dc.subject.other	pH	en
dc.subject.other	temperature effect	en
dc.title	Removal of Pb(II) from aqueous solutions by using clinoptilolite and bentonite as adsorbents	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.desal.2006.05.049	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.desal.2006.05.049	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	In the present study, the ability of natural zeolite clinoptilolite and bentonite (clay) to remove Pb(II) from aqueous solutions has been investigated in batch reactors with a maximum contact time of 120 min. Adsorption tests of Pb(II) were carried out using a solution concentration of 1,036 ppm at initial pH = 4, and solid to liquid ratio of 2 g/100 mL. The effects of agitation speed (0, 100, 200, 500 rpm), temperature (28 degrees C, 45 degrees C, 60 degrees C) and particle size (2.5-5.0 mm, dust) of the minerals were examined. The effect of acidity of the aqueous solution was also examined. Bentonite was found to be more effective for the removal of Pb(II) than clinoptilolite, under the experimental conditions used. The removal of Pb(II) using bentonite reached 100% at ambient temperature and mild agitation (100 rpm), while it was approximately 90% at 60 degrees C without agitation. On the other hand, the highest removal level reached by clinoptilolite was 55%. Clinoptilolite dust is found to be more efficient than granular clinoptilolite. Agitation and temperature affected the uptake of Pb(II), especially in the case of granular clinoptilolite (2.5-5.0 mm). Finally, it can be seen that acidity of the aqueous solution influences the removal of lead by the minerals. The adsorption of lead increases with an increase in pH of the solution from 1 to 4.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Desalination	en
dc.identifier.doi	10.1016/j.desal.2006.05.049	en
dc.identifier.isi	ISI:000247159700025	en
dc.identifier.volume	210	en
dc.identifier.issue	1-3	en
dc.identifier.spage	248	en
dc.identifier.epage	256	en