Effect of EDTA on quartz and hematite flotation with starch/amine in an aqueous solution containing Mn2+ ions
| Autor: | Rosa Malena Fernandes Lima, Deisiane Ferreira Lelis, Versiane Albis Leão |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
lcsh:TN1-997
inorganic chemicals Inorganic chemistry Iron ore chemistry.chemical_element Ethylenediaminetetraacetic acid corn starch 02 engineering and technology Manganese 020501 mining & metallurgy chemistry.chemical_compound Adsorption ethylenediaminetetraacetic acid complexing agent 020401 chemical engineering 0204 chemical engineering manganese species lcsh:Mining engineering. Metallurgy General Environmental Science Aqueous solution Mineral General Engineering EDTA Hematite 0205 materials engineering chemistry amine lcsh:TA1-2040 visual_art visual_art.visual_art_medium General Earth and Planetary Sciences Hydroxide Amine gas treating lcsh:Engineering (General). Civil engineering (General) cationic flotation |
| Zdroj: | REM-International Engineering Journal, Volume: 69, Issue: 4, Pages: 479-485, Published: DEC 2016 REM-International Engineering Journal v.69 n.4 2016 REM-International Engineering Journal Fundação Gorceix (FG) instacron:FG Repositório Institucional da UFOP Universidade Federal de Ouro Preto (UFOP) instacron:UFOP REM: International Engineering Journal, Vol 69, Iss 4, Pp 479-485 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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