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Chemical Engineering Communications Volume 207, 2020 - Issue 3
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Original Articles

Characterization and purification of waste phosphogypsum to make it suitable for use in the plaster and the cement industry

Yassine EnnaciriLaboratory of Physical Chemistry of Materials (LPCM), Faculty of Sciences, Chouaib Doukkali University, El Jadida, MoroccoCorrespondence[email protected]
ORCID Iconhttp://orcid.org/0000-0002-2442-7397
ORCID Icon,
Ilham ZdahLaboratory of Physical Chemistry of Materials (LPCM), Faculty of Sciences, Chouaib Doukkali University, El Jadida, MoroccoORCID Iconhttp://orcid.org/0000-0002-4681-7003
ORCID Icon,
Hanan El Alaoui-BelghitiLaboratory of Physical Chemistry of Materials (LPCM), Faculty of Sciences, Chouaib Doukkali University, El Jadida, MoroccoORCID Iconhttp://orcid.org/0000-0001-5888-0758
ORCID Icon &
Mohammed BettachLaboratory of Physical Chemistry of Materials (LPCM), Faculty of Sciences, Chouaib Doukkali University, El Jadida, MoroccoORCID Iconhttp://orcid.org/0000-0003-1795-1796
ORCID Icon
Pages 382-392 | Published online: 11 Apr 2019
 
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Abstract

The phosphoric acid production in Morocco generates a large amount of phosphogypsum (PG) which is a significant source of environmental contamination. In this work, PG has been characterized by different analysis techniques that allow to study the effect of the impurities on its physical and chemical properties. Thus, a method to purify the PG from phosphates and fluorides was proposed in order to improve its quality and to make it usable in plaster and cement. The purification process consists to sieve PG under 200 μm and to treat it by sulfuric acid to dissolve the insoluble impurities. The obtained results show that the treatment of PG by sulfuric acid 20 and 50% at 60 °C for 2 h is sufficient to make it suitable for used in the plaster and the cement respectively.

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