Leaching manganese nodules in an acid medium and room temperature comparing the use of different fe reducing agents

David Torres, Luís Ayala, Manuel Saldaña, Manuel Cánovas, Steven Nieto, Jonathan Castillo, PEDRO ADRIAN ROBLES VASQUEZ, Norman Toro

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The deposits of Fe-Mn, in the seabed of the planet, are a good alternative source for the extraction of elements of interest. Among these are marine nodules, which have approximately 24% manganese and may be a solution to the shortage of high-grade ores on the surface. In this investigation, an ANOVA analysis was performed to evaluate the time independent variables and MnO2/reducing agent in the leaching of manganese nodules with the use of different Fe reducing agents (FeS2, Fe2+, Fe0 and Fe2O3). Tests were also carried out for the different reducing agents evaluating the MnO2/Fe ratio, in which the Fe0 (FeC) proved to be the best reducing agent for the dissolution of Mn from marine nodules, achieving solutions of 97% in 20 min. In addition, it was discovered that at low MnO2/Fe ratios the acid concentration in the system is not very relevant and the potential and pH were in ranges of −0.4–1.4 V and −2–0.1 favoring the dissolution of Mn from MnO2.

Original languageEnglish
Article number1316
JournalMetals
Volume9
Issue number12
DOIs
StatePublished - Dec 2019
Externally publishedYes

Keywords

  • Acid media
  • ANOVA
  • Dissolution
  • MnO

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