Banca de QUALIFICAÇÃO: ANA CLÁUDIA PAIVA DE SANTIAGO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ANA CLÁUDIA PAIVA DE SANTIAGO
DATE: 05/10/2022
TIME: 20:00
LOCAL: remoto
TITLE:

Recovery of Mn from tailings from the Amazon mineral industry from acid leaching

KEY WORDS:

Amazon, tailings, leaching, acetate, oxalate, sulfate, Manganes

PAGES: 50
BIG AREA: Engenharias
AREA: Engenharia Ambiental
SUMMARY:

The present work describes the process of recovering Mn oxide tailings from the Amazon Region in the form of salts of this metal. The chosen route was based on acid leaching (acetic, sulfuric and oxalic acid) accompanied by hydrothermal treatment at temperatures above 70º C. The chemical-mineral characterization of the phases involved in the study (tailings and synthetic products) was carried out by X (XRD), Fourier transform infrared spectroscopy (FTIR), thermal analysis (TG-DTG-DSC) and scanning electron microscopy (SEM). The results obtained confirmed the obtaining of Mn acetate, oxalate and sulfate from Mn tailings composed of hematite, gibbsite, muscovite, lithiophorite and birnessite. These results indicate that a by-product with no economic value and with environmental potential can be a low-cost raw material for the production of technologically important Mn salts.

BANKING MEMBERS:
Presidente - 2142681 - BRUNO APOLO MIRANDA FIGUEIRA
Interno - 2143922 - ISRAEL NUNES HENRIQUE
Externo ao Programa - 1549200 - LUCINEWTON SILVA DE MOURA