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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Kinetic and thermodynamic study of magnesium obtaining as sulfate monohydrate from nickel laterite leach waste by crystallization

Full text
Author(s):
Wanderley, K. B. [1] ; Botelho Junior, A. B. [1] ; Espinosa, D. C. R. [1] ; Tenorio, J. A. S. [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Polytech Sch, Dept Chem Engn, Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF CLEANER PRODUCTION; v. 272, NOV 1 2020.
Web of Science Citations: 2
Abstract

According to the European Union, magnesium is considered as a critical metal, which can also be found in nickel laterite waste processing, where it is a strategic element with nickel, copper, and cobalt. For this reason, the goal of this work was to study the parameters for crystallization of magnesium sulphate under pressure based on nickel laterite leach solution through a reactor designed with separation system where monohydrate crystals were not decomposed. A magnesium monoelementary solution was used for the present study. After the reaction, the solid phase was separated with the reactor still under pressure to avoid crystals decomposition. Magnesium sulphate solubility was determined to complement the data already published in the literature and to define the solubility product from 30 to 230 degrees C. Pitzer interaction model made possible the Kps values were obtained at high-temperatures. The crystallization of magnesium sulphate reached the equilibrium in 5 h. At pH 5.7 and 230 degrees C, 81% of the magnesium crystallized. The particles presented a spherical morphology. The reactor here designed allowed the realization of crystallization at high-temperature, without crystals decomposition. The flowchart here proposed represents the novelty since it could be used for critical metals recovery from mining waste. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 17/06563-8 - INFLUENCE OF REDUCING AGENT ON SULFURIC LIQUOR OF NICKEL LATERITE MINING IN THE ION EXCHANGE PROCESS USING CHELATING
Grantee:Amilton Barbosa Botelho Junior
Support Opportunities: Scholarships abroad - Research Internship - Master's degree
FAPESP's process: 16/05527-5 - Separation of metals from sulfuric liquor of mining waste using chelating resins
Grantee:Amilton Barbosa Botelho Junior
Support Opportunities: Scholarships in Brazil - Master
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