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Title: Effect of EDTA on quartz and hematite flotation with starch/amine in an aqueous solution containing Mn2+ ions.
Authors: Lelis, Deisiane Ferreira
Leão, Versiane Albis
Lima, Rosa Malena Fernandes
Keywords: Iron ore
Cationic flotation
Corn starch
Issue Date: 2016
Citation: LELIS, D. F.; LEÃO, V. A.; LIMA, R. M. F. Effect of EDTA on quartz and hematite flotation with starch/amine in an aqueous solution containing Mn2+ ions. REM - International Engineering Journal, v. 69, p. 479-485, 2016. Disponível em: <>. Acesso em: 25 ago. 2017.
Abstract: In this paper, a detailed study of the influence of Mn2+ ions on quartz and hematite flotation (at pH 10.5 with starch/amine as depressor/collector) in the absence and presence of ethylenediaminetetraacetic acid (EDTA) is presented. By using zeta potential measurement and a careful analysis of manganese species present in water for dosages in which manganese hydroxide precipitated, we confirmed that the depression of both minerals by Mn2+ ions is due to the following: (i) the adsorption of Mn hydroxy complexes (Mn2(OH)3+ and Mn(OH)+); (ii) Mn2+ and mainly (iii) the precipitation of Mn(OH)2 on mineral surfaces. These effects hindered the adsorption of amine species on the surfaces of the minerals (quartz and hematite). EDTA was used to complex Mn2+ to restore the recoveries of both minerals. This was confirmed by the species distribution diagrams of Mn and EDTA–Mn in water. Conditioning with starch followed by amine at pH 10.5 enabled a selective separation of these minerals.
ISSN: 1807-0360
metadata.dc.rights.license: A REM - International Engineering Journal - autoriza o depósito de cópia de artigos dos professores e alunos da UFOP no Repositório Institucional da UFOP. Licença concedida mediante preenchimento de formulário online em 12 set. 2013.
Appears in Collections:DEMIN - Artigos publicados em periódicos

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