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2020 | OriginalPaper | Chapter

Brazilian Bauxite Residue Physical–Chemical Characterization and Acidic Neutralization Potential

Authors : Patricia Magalhães Pereira Silva, Andre Luiz Vilaça do Carmo, Roseanne Barata Holanda, Fernando Gama Gomes, Emanuele Nogueira, Raphael Vieira da Costa, Caio César Amorim de Melo, Adriano Reis Lucheta, Marcelo Montini

Published in: Light Metals 2020

Publisher: Springer International Publishing

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Abstract

Physical-chemical evaluation of Brazilian (Amazon region) bauxite residue (BR) and analysis of its acid neutralization capacity (ANC) using, hydrochloric (HCl), sulfuric acid (H₂SO₄) and citric acid (C₃H₈O₇) were carried out to assess the potential application of BR as soil ameliorant. Analysis indicated a particle size average size (D₅₀) of 6.04 μm, 1.65 g cm⁻³ density and 18.28 mS cm⁻¹ electrical conductivity. Mineral phases determined by XRD showed hematite, aluminous goethite, anatase, sodalite, gibbsite and quartz, in agreement with XRF (%) elemental characterization: Fe (24.38), Al (11.20), Si (7.91), Na (8.11), Ti (3.24), Ca (0.79), Zr (0.71), S (0.06), V (0.07) and Mn (0.09). ANC analyses conducted after 21 days indicated a lower acid consumption and pH equilibrium for H₂SO₄ and HCl (1.75 and 1.00 mol H⁺ kg⁻¹, respectively and ~pH8) when comparing with C₃H₈O₇ (2 mol H⁺ kg⁻¹). Results validate and provide basis for an effective use of BR in agronomic applications.

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Title: Brazilian Bauxite Residue Physical–Chemical Characterization and Acidic Neutralization Potential
Authors: Patricia Magalhães Pereira Silva
Andre Luiz Vilaça do Carmo
Roseanne Barata Holanda
Fernando Gama Gomes
Emanuele Nogueira
Raphael Vieira da Costa
Caio César Amorim de Melo
Adriano Reis Lucheta
Marcelo Montini
Publisher: Springer International Publishing
Book: Light Metals 2020
Print ISBN: 978-3-030-36407-6

Electronic ISBN: 978-3-030-36408-3

Copyright Year: 2020
DOI: https://doi.org/10.1007/978-3-030-36408-3_16

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