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

Author(s):Show less -

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

• Document type: Journal article
• Source: ENERGY TECHNOLOGY 2019: CARBON DIOXIDE MANAGEMENT AND OTHER TECHNOLOGIES; v. N/A, p. 10-pg., 2019-01-01.

Abstract

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)

• FAPESP's process: 17/17340-0 - Study of copper separation from mining wastewater and synthesis of nanoparticles
• Grantee: Iara Alves Anes
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 12/51871-9 - Study Center for Technology in Waste Solid Treatment and Recycling - SCTWSTR
• Grantee: Jorge Alberto Soares Tenório
• Support Opportunities: Research Projects - Thematic Grants