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    Mineralogical and chemical investigation of Tunisian phosphate washing waste during calcination

    TitleMineralogical and chemical investigation of Tunisian phosphate washing waste during calcination
    Publication TypePapers in International Journals
    Year of Publication2019
    AuthorsDabbebi R., Aguiar, J. B., Samet B., and s. Baklouti
    Abstract

    Phosphate washing waste (PWW) is one of the wastes generated by the phosphate mine with a very high amount. This waste was investigated in this work to study the effect of the calcination of the PWW at four different temperatures 600 oC, 700 oC, 800 oC and 900 oC on its mineralogical and chemical composition. The samples were investigated by X-ray powder diffraction, Fourier transform infrared, differential scanning calorimetry and thermogravimetric analysis, solidstate magic angle spinning nuclear magnetic resonance of 29Si, 27Al and 31P and scanning electron microscope. The results show that the PWW presents a complex system and it suffers a significant change on its mineralogical and chemical composition after calcination. It reveals the presence of carbonate, natural zeolite, fluorapatite, quartz and clay. After calcination, the waste shows the disappearance of some of these phases and the appearance of others and some other phases remain steady.

    JournalJournal of Thermal Analysis and Calorimetry
    Volume137
    Pagination1827 - 1840
    Date Published2019-10-01
    PublisherSpringer International Publishing
    ISSNPrint ISSN 1388-6150 | Online ISSN 1588-2926
    DOI10.1007/s10973-019-08057-3
    KeywordsCalcination, DSC–TG, FTIR, MAS-NMR., Mineralogy, Phosphate washing waste, XRD
    RightsembargoedAccess (2 Years)
    Peer reviewedyes
    Statuspublished
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    About CTAC

    The Centre for Territory, Environment and Construction (CTAC) is a research unit of the School of Engineering of University of Minho (UMinho), recognised by the “FCT – Fundação para a Ciência e Tecnologia” (Foundation for Science and Technology), associated to the Department of Civil Engineering (DEC), with whom it shares resources and namely human resources.

    Currently CTAC aggregates 24 researchers holding a PhD of which 20 are faculty professors of the Civil Engineering Department. Read more


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