Synthesis of TiO2 nano-powders prepared from purified sulphate leach liquor of red mud

Tsakiridis, PE; Oustadakis, P; Katsiapi, A; Perraki, M; Agatzini-Leonardou, S

dc.contributor.author	Tsakiridis, PE	en
dc.contributor.author	Oustadakis, P	en
dc.contributor.author	Katsiapi, A	en
dc.contributor.author	Perraki, M	en
dc.contributor.author	Agatzini-Leonardou, S	en
dc.date.accessioned	2014-03-01T01:37:12Z
dc.date.available	2014-03-01T01:37:12Z
dc.date.issued	2011	en
dc.identifier.issn	0304-3894	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21481
dc.subject	Leach liquor	en
dc.subject	Purification	en
dc.subject	Red mud	en
dc.subject	Titanium recovery	en
dc.subject.classification	Engineering, Environmental	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	Chemical precipitation	en
dc.subject.other	Cyanex 272	en
dc.subject.other	Extractant concentration	en
dc.subject.other	Iron concentrations	en
dc.subject.other	Leach liquors	en
dc.subject.other	Morphological characteristic	en
dc.subject.other	Nano powders	en
dc.subject.other	Organic phase	en
dc.subject.other	Purification process	en
dc.subject.other	Red mud	en
dc.subject.other	Sulphates	en
dc.subject.other	TGA/DTA	en
dc.subject.other	TiO	en
dc.subject.other	XRD	en
dc.subject.other	Aluminum	en
dc.subject.other	Engineering research	en
dc.subject.other	Fourier transform infrared spectroscopy	en
dc.subject.other	Leaching	en
dc.subject.other	Organic solvents	en
dc.subject.other	Powders	en
dc.subject.other	Precipitates	en
dc.subject.other	Precipitation (chemical)	en
dc.subject.other	Purification	en
dc.subject.other	Recovery	en
dc.subject.other	Scanning electron microscopy	en
dc.subject.other	Solvent extraction	en
dc.subject.other	Solvents	en
dc.subject.other	Thermoanalysis	en
dc.subject.other	Titanium	en
dc.subject.other	Toluene	en
dc.subject.other	X ray diffraction	en
dc.subject.other	X ray diffraction analysis	en
dc.subject.other	Titanium dioxide	en
dc.subject.other	aluminum	en
dc.subject.other	bis (2,4,4 trimethylpentyl)phosphinic acid	en
dc.subject.other	iron	en
dc.subject.other	phosphinic acid derivative	en
dc.subject.other	red mud sulphate leach liquor	en
dc.subject.other	sulfate	en
dc.subject.other	titanium	en
dc.subject.other	titanium dioxide	en
dc.subject.other	toluene	en
dc.subject.other	unclassified drug	en
dc.subject.other	aluminum	en
dc.subject.other	concentration (composition)	en
dc.subject.other	dilution	en
dc.subject.other	hydrochloric acid	en
dc.subject.other	mud	en
dc.subject.other	oxide	en
dc.subject.other	pH	en
dc.subject.other	precipitation (chemistry)	en
dc.subject.other	research work	en
dc.subject.other	sulfate	en
dc.subject.other	temperature effect	en
dc.subject.other	toluene	en
dc.subject.other	X-ray diffraction	en
dc.subject.other	article	en
dc.subject.other	differential scanning calorimetry	en
dc.subject.other	environmental temperature	en
dc.subject.other	infrared spectroscopy	en
dc.subject.other	liquid	en
dc.subject.other	pH measurement	en
dc.subject.other	precipitation	en
dc.subject.other	purification	en
dc.subject.other	scanning electron microscopy	en
dc.subject.other	solvent extraction	en
dc.subject.other	structure analysis	en
dc.subject.other	temperature measurement	en
dc.subject.other	thermogravimetry	en
dc.subject.other	X ray diffraction	en
dc.title	Synthesis of TiO2 nano-powders prepared from purified sulphate leach liquor of red mud	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jhazmat.2011.07.072	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jhazmat.2011.07.072	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	The research work presented in this paper is focused on the development of a purification process of red mud sulphate leach liquor for the recovery of titanium oxide (TiO2) nano-powders in the form of anatase. Initially, titanium was extracted over iron and aluminium from the leach liquor by solvent extraction using Cyanex 272 in toluene, at pH: 0.3 and T: 25 degrees C, with 40% extractant concentration. Stripping of the loaded, with titanium, organic phase was carried out by diluted HCl (3 mol/L) at ambient temperature. Finally, the recovery of titanium nano-powder, in the form of anatase, was performed by chemical precipitation at pH: 6 and T: 95 degrees C, using 10 wt% MgO pulp as neutralizing agent. The produced precipitates were characterized by X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric/differential thermal analysis (TGA/DTA). Their morphological characteristics and microstructure were studied by scanning electron microscopy (SEM). High grade titanium white precipitate, in the form of anatase, was obtained. Iron concentration in the precipitate did not exceed 0.3%, whereas no aluminium was detected. (C) 2011 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Journal of Hazardous Materials	en
dc.identifier.doi	10.1016/j.jhazmat.2011.07.072	en
dc.identifier.isi	ISI:000296822000006	en
dc.identifier.volume	194	en
dc.identifier.spage	42	en
dc.identifier.epage	47	en