Recovery of lanthanides and yttrium from red mud by selective leaching

Ochsenkuhn-Petropulu, M; Lyberopulu, Th; Ochsenkuhn, KM; Parissakis, G

dc.contributor.author	Ochsenkuhn-Petropulu, M	en
dc.contributor.author	Lyberopulu, Th	en
dc.contributor.author	Ochsenkuhn, KM	en
dc.contributor.author	Parissakis, G	en
dc.date.accessioned	2014-03-01T01:12:13Z
dc.date.available	2014-03-01T01:12:13Z
dc.date.issued	1996	en
dc.identifier.issn	0003-2670	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12019
dc.subject	Atomic emission spectrometry	en
dc.subject	Inductively coupled plasma spectrometry	en
dc.subject	Lanthanides	en
dc.subject	Red mud	en
dc.subject	Selective leaching	en
dc.subject	Yttrium	en
dc.subject.classification	Chemistry, Analytical	en
dc.subject.other	lanthanide	en
dc.subject.other	yttrium	en
dc.subject.other	aluminum factory	en
dc.subject.other	article	en
dc.subject.other	atomic emission spectrometry	en
dc.subject.other	drug determination	en
dc.subject.other	extraction	en
dc.subject.other	leaching	en
dc.subject.other	nonhuman	en
dc.subject.other	priority journal	en
dc.subject.other	quantitative assay	en
dc.subject.other	soil	en
dc.subject.other	technique	en
dc.title	Recovery of lanthanides and yttrium from red mud by selective leaching	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0003-2670(95)00486-6	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0003-2670(95)00486-6	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	This study presents a rapid and selective method for the recovery of lanthanides and yttrium, existing in economically interesting concentrations, from red mud, the byproduct of the alumina production. The leaching process is based on the extraction of these elements with diluted nitric acid from red mud under moderate conditions and without using any preliminary treatment. Several parameters such as leaching agents, contact time, temperature, pressure and solid to liquid ratio were investigated in order to achieve an optimum recovery. The process followed here was selected taking into account its efficiency for the selective recovery of yttrium and lanthanides, but also its suitability for the subsequent liquid-liquid extraction of the leaching solution for the separation of the individual lanthanides. The achieved recovery percentages were for Y about 90%, for the investigated heavy lanthanides (Dy, Er, Yb) up to 70%, for the middle ones (Nd, Sm, Eu, Gd) up to 50% and for the group of light lanthanides (La, Ce, Pr) up to 30%. Most of the main elements of the red mud and especially iron are hardly dissolved by this leaching process, leading to an interference free determination of the lanthanides and yttrium in the leachate by inductively coupled plasma-atomic emission spectroscopy (ICP-AES).	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Analytica Chimica Acta	en
dc.identifier.doi	10.1016/0003-2670(95)00486-6	en
dc.identifier.isi	ISI:A1996TU77700031	en
dc.identifier.volume	319	en
dc.identifier.issue	1-2	en
dc.identifier.spage	249	en
dc.identifier.epage	254	en