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Sustainable Approach for Recovery of Sulfur from Phophogypsum

[Image: see text] Phosphogypsum releases have a detrimental effect on flora and fauna and also cause economic loss due to the loss of sulfur. This study contributes to solving this problem using a process that consists of the valorization of this byproduct. A new sustainable method that consists of...

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Autores principales: Chaalal, Omar, Madhuranthakam, Chandra Mouli R., Moussa, Brada, Hossain, Md Monwar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7161053/
https://www.ncbi.nlm.nih.gov/pubmed/32309725
http://dx.doi.org/10.1021/acsomega.0c00420
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author Chaalal, Omar
Madhuranthakam, Chandra Mouli R.
Moussa, Brada
Hossain, Md Monwar
author_facet Chaalal, Omar
Madhuranthakam, Chandra Mouli R.
Moussa, Brada
Hossain, Md Monwar
author_sort Chaalal, Omar
collection PubMed
description [Image: see text] Phosphogypsum releases have a detrimental effect on flora and fauna and also cause economic loss due to the loss of sulfur. This study contributes to solving this problem using a process that consists of the valorization of this byproduct. A new sustainable method that consists of using sulfuric acid is proposed to process the Algerian phosphogypsum to recover the sulfur, which is imported in huge quantities until today. The experiments carried out in this investigation have enabled us to recover sulfur in the form of SO(2) using appropriate additives such as silica, alumina, clay, and charcoal as reducing agents. These additives accelerate the desulfurization process and decrease the decomposition temperature of calcium sulfate. As a result, these additives allow the reduction of energy used and simultaneously increase the concentration of SO(2). X-ray diffraction shows that thermochemical decomposition is not complete and that the sulfur present in the residue exists in the form of CaSO(4) and CaS at 1150 °C. After calcination of phosphogypsum, the analysis of the residues obtained shows that they have a chemical composition almost identical in terms of quality to that of clinker, which can further be used in the cement production.
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spelling pubmed-71610532020-04-17 Sustainable Approach for Recovery of Sulfur from Phophogypsum Chaalal, Omar Madhuranthakam, Chandra Mouli R. Moussa, Brada Hossain, Md Monwar ACS Omega [Image: see text] Phosphogypsum releases have a detrimental effect on flora and fauna and also cause economic loss due to the loss of sulfur. This study contributes to solving this problem using a process that consists of the valorization of this byproduct. A new sustainable method that consists of using sulfuric acid is proposed to process the Algerian phosphogypsum to recover the sulfur, which is imported in huge quantities until today. The experiments carried out in this investigation have enabled us to recover sulfur in the form of SO(2) using appropriate additives such as silica, alumina, clay, and charcoal as reducing agents. These additives accelerate the desulfurization process and decrease the decomposition temperature of calcium sulfate. As a result, these additives allow the reduction of energy used and simultaneously increase the concentration of SO(2). X-ray diffraction shows that thermochemical decomposition is not complete and that the sulfur present in the residue exists in the form of CaSO(4) and CaS at 1150 °C. After calcination of phosphogypsum, the analysis of the residues obtained shows that they have a chemical composition almost identical in terms of quality to that of clinker, which can further be used in the cement production. American Chemical Society 2020-04-02 /pmc/articles/PMC7161053/ /pubmed/32309725 http://dx.doi.org/10.1021/acsomega.0c00420 Text en Copyright © 2020 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Chaalal, Omar
Madhuranthakam, Chandra Mouli R.
Moussa, Brada
Hossain, Md Monwar
Sustainable Approach for Recovery of Sulfur from Phophogypsum
title Sustainable Approach for Recovery of Sulfur from Phophogypsum
title_full Sustainable Approach for Recovery of Sulfur from Phophogypsum
title_fullStr Sustainable Approach for Recovery of Sulfur from Phophogypsum
title_full_unstemmed Sustainable Approach for Recovery of Sulfur from Phophogypsum
title_short Sustainable Approach for Recovery of Sulfur from Phophogypsum
title_sort sustainable approach for recovery of sulfur from phophogypsum
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7161053/
https://www.ncbi.nlm.nih.gov/pubmed/32309725
http://dx.doi.org/10.1021/acsomega.0c00420
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