Natural zeolites and their ion exchange behavior towards chromium

Loizidou, M; Haralambous, KJ; Loukatos, A; Dimitrakopoulou, D

dc.contributor.author	Loizidou, M	en
dc.contributor.author	Haralambous, KJ	en
dc.contributor.author	Loukatos, A	en
dc.contributor.author	Dimitrakopoulou, D	en
dc.date.accessioned	2014-03-01T01:08:57Z
dc.date.available	2014-03-01T01:08:57Z
dc.date.issued	1992	en
dc.identifier.issn	1077-1204	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10748
dc.subject	ION-EXCHANGE	en
dc.subject	ZEOLITES	en
dc.subject	CHROMIUM	en
dc.subject	CLINOPTILOLITE	en
dc.subject.classification	Engineering, Environmental	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	Chromium Compounds - Concentration	en
dc.subject.other	Heavy Metals - Removal	en
dc.subject.other	Regeneration	en
dc.subject.other	Wastewater Treatment - Ion Exchange	en
dc.subject.other	Zeolites - Characterization	en
dc.subject.other	Clinoptilolite	en
dc.subject.other	Zeolites	en
dc.subject.other	chromium	en
dc.subject.other	industrial effluent	en
dc.subject.other	zeolite	en
dc.subject.other	article	en
dc.subject.other	behavior	en
dc.subject.other	ion exchange	en
dc.title	Natural zeolites and their ion exchange behavior towards chromium	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/10934529209375824	en
heal.identifier.secondary	http://dx.doi.org/10.1080/10934529209375824	en
heal.language	English	en
heal.publicationDate	1992	en
heal.abstract	In this work studies have been performed which demonstrate that trivalent chromium cations may be retained by naturally occuring zeolites. The experimental work performed on the natural zeolite clinoptilolite, which is found in abundant quantities in Greece, showed that the ion exchange process is quite rapid and high quantities of chromium ions are removed from the aqueous solutions in a short period of time. Also, the actual exchange capacity of the zeolites is much smaller, about 50%, of the theoretical one. Despite the regeneration conditions used, significant amounts of chromium is retained by the zeolite. It was also shown that loading and regenerating the zeolite greatly improves the ion exchange capacity of the zeolite, since a very small amount of chromium is released during regeneration and an almost constant amount is taken after each loading cycle.In this work studies have been performed which demonstrate that trivalent chromium cations may be retained by naturally occuring zeolites. The experimental work performed on the natural zeolite clinoptilolite, which is found in abundant quantities in Greece, showed that the ion exchange process is quite rapid and high quantities of chromium ions are removed from the aqueous solutions in a short period of time. Also, the actual exchange capacity of the zeolites is much smaller, about 50%, of the theoretical one. Despite the regeneration conditions used, significant amounts of chromium is retained by the zeolite. It was also shown that loading and regenerating the zeolite greatly improves the ion exchange capacity of the zeolite, since a very small amount of chromium is released during regeneration and an almost constant amount is taken after each loading cycle.	en
heal.publisher	MARCEL DEKKER INC	en
heal.journalName	Journal of Environmental Science and Health - Part A Environmental Science and Engineering	en
dc.identifier.doi	10.1080/10934529209375824	en
dc.identifier.isi	ISI:A1992JL05600010	en
dc.identifier.volume	27	en
dc.identifier.issue	7	en
dc.identifier.spage	1759	en
dc.identifier.epage	1769	en