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Environmental Earth Sciences

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01.02.2014 | Original Article

Mineralogical and chemical composition of magnetic fly ash fraction

verfasst von: Xue Song Wang

Erschienen in: Environmental Earth Sciences | Ausgabe 4/2014

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Abstract

Magnetic fractions of coal fly ashes from three power plants were obtained by wet magnetic separation method. Quartz and mullite were the crystalline minerals dominating the nonmagnetic fractions. Magnetic fractions contained magnetite, hematite, and, to a lesser extent, quartz and mullite. Iron speciation by Mössbauer spectroscopy indicated the presence of Fe²⁺ and Fe³⁺ in aluminosilicate glass in magnetic fractions apart from magnetite and hematite. Chemical analyses revealed that magnetic fractions had about 2.5 times higher concentrations of Co and one to two times higher concentrations of Ni, Cu, Zn, Mo, and Cd. The dominant magnetic minerals were ferrimagnetic, and multi domain and stable single domain grains contributed mainly to the magnetic enhancement of fly ash samples.

Vorheriger Artikel Effectiveness of zinc application to minimize cadmium toxicity and accumulation in wheat (Triticum aestivum L.)

Nächster Artikel Geochemistry of Cd in groundwater of Winder, Balochistan and suspected health problems

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Titel: Mineralogical and chemical composition of magnetic fly ash fraction
verfasst von: Xue Song Wang
Publikationsdatum: 01.02.2014
Verlag: Springer Berlin Heidelberg
Erschienen in: Environmental Earth Sciences / Ausgabe 4/2014
Print ISSN: 1866-6280
Elektronische ISSN: 1866-6299
DOI: https://doi.org/10.1007/s12665-013-2571-0

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