Effect of pH and Potential in Chemical Precipitation of Copper by Sodium Dithionite

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Anes, I. A. ; Botelho Junior, A. B. ; Espinosa, D. C. R. ; Tenorio, J. A. S. ; Wang, T ; Chen, X ; Guillen, DP ; Zhang, L ; Sun, Z ; Wang, C ; Haque, N ; Howarter, JA ; Neelameggham, NR ; Ikhmayies, S ; Smith, YR ; Tafaghodi, L ; Pandey, A

• Tipo de documento: Artigo Científico
• Fonte: ENERGY TECHNOLOGY 2019: CARBON DIOXIDE MANAGEMENT AND OTHER TECHNOLOGIES; v. N/A, p. 10-pg., 2019-01-01.

Resumo

The aim of this work was to study the effect of pH and potential in copper precipitation from nickel laterite leach solution. A synthetic solution was prepared to simulate the real conditions and sodium dithionite was used as reducing agent. The effect of pH was studied between pH 0.50 and 3.50. Sodium dithionite 1 mol/L was added to decrease the potential. The stirring speed was 45 rpm and reaction time was 45 min. Results indicated that copper precipitation decreased when pH increases. Copper precipitation was selective in 240 mV at pH 0.50-1.50. Co-precipitation was observed in experiments performed in pH above 2.00. (AU)

• Processo FAPESP: 17/17340-0 - Estudo da separação de cobre de lixiviado de resíduo da mineração e síntese de nanopartícula
• Beneficiário: Iara Alves Anes
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 12/51871-9 - Estudo de novas tecnologias e rotas de processamento para o tratamento e reciclagem de resíduos sólidos
• Beneficiário: Jorge Alberto Soares Tenório
• Modalidade de apoio: Auxílio à Pesquisa - Temático