Purification of Bentonite Clays from Cubati, PB, Brazil, for Diversified Applications

Abstract:

The State of Paraíba, Brazil, retains about 88.5% of all Brazilian bentonite, and much of this production comes from deposits in the District of Boa Vista, PB. Nevertheless, the deposits are almost depleted. Recently, new deposits were found, which will increases the reserves of the State, in the regions of Cubati and Pedra Lavrada, PB. The objective of this work is to characterize and develop purified clays, through sieving and hydrocycloning techniques, from those recently discovered bentonites for several applications. The characterization of the sample was done through granulometric analysis by laser diffraction, X-ray diffraction, chemical analysis by X-ray fluorescence, and thermogravimetric and differential thermal analysis. The results show that the samples are typical of bentonite clays, and that the purification solely by hydrocyclone presents the best results.

• Periodical: Materials Science Forum (Volume 805)
• Pages: 486-491
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.805.486
• Online since: September 2014
• Authors: J.M.R. Figueirêdo*, Juliana Melo Cartaxo, I.A. Silva, C.D. Silva, Gelmires Araújo Neves, Heber Carlos Ferreira
• Keywords: Bentonite Clays, Characterization, Purification

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