Removal of nickel and cobalt from aqueous solutions by Na-activated bentonite

Triantafyllou, S; Christodoulou, E; Neou-Syngouna, P

dc.contributor.author	Triantafyllou, S	en
dc.contributor.author	Christodoulou, E	en
dc.contributor.author	Neou-Syngouna, P	en
dc.date.accessioned	2014-03-01T01:15:08Z
dc.date.available	2014-03-01T01:15:08Z
dc.date.issued	1999	en
dc.identifier.issn	0009-8604	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13357
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0033208521&partnerID=40&md5=c497579b86c6b3d3989ffe19a0c7ff41	en
dc.subject	Adsorption	en
dc.subject	Bentonite	en
dc.subject	Cation exchange	en
dc.subject	Clays	en
dc.subject	Cobalt removal	en
dc.subject	Heavy metals	en
dc.subject	Nickel removal	en
dc.subject	Wastewater	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.classification	Mineralogy	en
dc.subject.classification	Soil Science	en
dc.subject.classification	Water Resources	en
dc.subject.other	Adsorption	en
dc.subject.other	Cobalt	en
dc.subject.other	Ion exchange	en
dc.subject.other	Nickel	en
dc.subject.other	Positive ions	en
dc.subject.other	Removal	en
dc.subject.other	Sodium	en
dc.subject.other	Solutions	en
dc.subject.other	Temperature	en
dc.subject.other	Cation exchange capacity	en
dc.subject.other	Initial cation concentration	en
dc.subject.other	Solid to liquid ratios	en
dc.subject.other	Bentonite	en
dc.subject.other	adsorption	en
dc.subject.other	bentonite	en
dc.subject.other	cation exchange capacity	en
dc.subject.other	cobalt	en
dc.subject.other	nickel	en
dc.subject.other	wastewater	en
dc.title	Removal of nickel and cobalt from aqueous solutions by Na-activated bentonite	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	The ability of Na-activated bentonite to remove Ni2+ and Co2+ from aqueous solutions at room temperature (22 ± 1°C) was studied under various experimental conditions. The parameters studied were solid-to-liquid ratios and initial cation concentrations. Experiments involved the behavior of bentonite vs. Ni and Co separately and where Ni and Co were present in solution at different concentrations and ratios. Bentonite retained substantial amounts of both metals readily, but it showed a higher affinity for Ni. Over-exchange appears when initial metal concentration exceeds the concentration corresponding to the cation exchange capacity (CEC) of bentonite. The presence of both metals in solution may be either synergistic or antagonistic sorption, depending on the initial ion concentrations.The ability of Na-activated bentonite to remove Ni2+ and Co2+ from aqueous solutions at room temperature (22 ± 1°C) was studied under various experimental conditions. The parameters studied were solid-to-liquid ratios and initial cation concentrations. Experiments involved the behavior of bentonite vs. Ni and Co separately and where Ni and Co were present in solution at different concentrations and ratios. Bentonite retained substantial amounts of both readily, but it showed a higher affinity for Ni. Over-exchange appears when initial metal concentration exceeds the concentration corresponding to the cation exchange capacity (CEC) of bentonite. The presence of both metals in solution may be either synergistic or antagonistic sorption, depending on the initial ion concentrations.	en
heal.publisher	Clay Minerals Soc, Lawrence, KS, United States	en
heal.journalName	Clays and Clay Minerals	en
dc.identifier.isi	ISI:000083478400003	en
dc.identifier.volume	47	en
dc.identifier.issue	5	en
dc.identifier.spage	567	en
dc.identifier.epage	572	en