Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design method

Bieseki, Lindiane; Bertell, Francine; Treichel, Helen; Penha, Fabio G.; Pergher, Sibele Berenice Castellã

Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design method

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dc.contributor.author	Bieseki, Lindiane
dc.contributor.author	Bertell, Francine
dc.contributor.author	Treichel, Helen
dc.contributor.author	Penha, Fabio G.
dc.contributor.author	Pergher, Sibele Berenice Castellã
dc.date.accessioned	2020-07-02T13:42:32Z
dc.date.available	2020-07-02T13:42:32Z
dc.date.issued	2013
dc.description.resumo	Montmorillonite clays are of great interest for industrial processes such as catalysis and adsorption. The textural properties of clays can be modified in an attempt to increase their uses. This paper describes the acid treatment of natural montmorillonite clay. The materials were characterized using X-ray diffraction (XRD), atomic absorption spectroscopy (AA) and BET surface area measurements. Three different acids (HCl, HNO3 and H2SO4) were tested, and HCl and H2SO4 were more efficient for removing Fe from the clay. The results indicate that HCl better preserves the material structure because less Al is removed. A central composite design (CCD) 22 was applied to evaluate the treatment using HCl. The temperature and concentration presented positive effects on the removal of Fe, Al and Mg. Combinations of the HCl acid solution concentration and temperature, such as 4 mol.L-1/50 °C and 1 mol.L-1/75 °C, assured that Fe was removed with less damage to the structure.	pt_BR
dc.identifier.citation	BIESEKI, Lindiane; BERTELL, Francine; TREICHEL, Helen; PENHA, Fabio G.; PERGHER, Sibele Berenice Castellã. Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design method. Materials Research, [s.l.], v. 16, n. 5, p. 1122-1127, 16 jul. 2013. Disponível em: https://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000500023&lng=en&tlng=en. Acesso em: 02 jul. 2020. https://doi.org/10.1590/S1516-14392013005000114.	pt_BR
dc.identifier.doi	10.1590/s1516-14392013005000114
dc.identifier.issn	1516-1439
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/29397
dc.language	en	pt_BR
dc.publisher	ABM, ABC, ABPol	pt_BR
dc.rights	Attribution-NonCommercial 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc/3.0/br/	*
dc.subject	Acid treatment	pt_BR
dc.subject	Clay	pt_BR
dc.subject	Montmorillonite	pt_BR
dc.subject	Fe removal	pt_BR
dc.subject	Central composite design	pt_BR
dc.title	Acid treatments of montmorillonite-rich clay for Fe removal using a factorial design method	pt_BR
dc.type	article	pt_BR