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Investigating the occurrences of valuable trace elements in African coals as potential byproducts of coal and coal combustion products
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Mineralteknik och metallurgi.ORCID-id: 0000-0002-2265-6321
2019 (Engelska)Ingår i: Journal of African Earth Sciences, ISSN 1464-343X, Vol. 150, s. 131-135Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

There is a growing attention in valuable trace elements (TEs) in coal and coal combustionproducts as they can potentially be future resources of valuable TEs. Therefore, understanding the mode of occurrences of valuable TEs in coal has several advantages for their economical and industrial extractions. Since there is limited information on the affinity of valuable TEs in the structure of African coals, this study explores correlations between conventional coal properties and concentration of vanadium, yttrium, gallium and lithium as valuable TEs for a wide range of African coal samples (139 samples) from South Africa, Botswana, Egypt, Tanzania, Nigeria and Zambia by statistical methods. Statistical assessments indicated that the concentrations of Y, V, Li and Ga for these countries are higher than their value in the world coal (on average). The outcomes of assessments showed that the Li, Ga and V are associated with the mineral matter fraction (inorganic affinity) of the coal where they have significant positive correlations with ash and Al (as a major element) and potentially clay minerals are their main bearing minerals. However, statistical explorations suggested that Y may have both the organic and inorganic occurrences in the African coal samples

Ort, förlag, år, upplaga, sidor
Elsevier, 2019. Vol. 150, s. 131-135
Nyckelord [en]
Coal, Yttrium, Lithium, Gallium, Vanadium, Africa
Nationell ämneskategori
Metallurgi och metalliska material
Forskningsämne
Mineralteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-71734DOI: 10.1016/j.jafrearsci.2018.11.011ISI: 000460195100011Scopus ID: 2-s2.0-85057148699OAI: oai:DiVA.org:ltu-71734DiVA, id: diva2:1265423
Anmärkning

Validerad;2018;Nivå 2;2018-11-23 (johcin)

Tillgänglig från: 2018-11-23 Skapad: 2018-11-23 Senast uppdaterad: 2019-04-11Bibliografiskt granskad

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Chelgani, Saeed Chehreh

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