DC pole | Wartość | Język |
dc.contributor.author | Magiera, Tadeusz | - |
dc.contributor.author | Gołuchowska, Beata | - |
dc.contributor.author | Jabłońska, Mariola | - |
dc.date.accessioned | 2019-06-05T07:44:53Z | - |
dc.date.available | 2019-06-05T07:44:53Z | - |
dc.date.issued | 2013 | - |
dc.identifier.citation | Water, Air, and Soil Pollution, Vol. 224, no. 1 (2013), art. no. 1389 | pl_PL |
dc.identifier.issn | 0049-6979 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/9363 | - |
dc.description.abstract | During this study, we investigated the mineralogical
characterization of technogenic magnetic
particles (TMPs) contained in alkaline industrial dust
and fly ash emitted by coal burning power plants and
cement plants. The reaction of tested dust samples
varied between values of pH 8 and pH 12. Their
magnetic properties were characterized by measurement
of magnetic susceptibility (χ), frequency dependence
of magnetic susceptibility (χfd), and temperature
dependence of magnetic susceptibility. Mineralogical
and geochemical analyses included scanning electron
microscopy with energy dispersive spectroscopy, microprobe
analysis and X-ray diffraction. The TMPs in
fly ash from hard coal combustion have the form of
typical magnetic spherules with a smooth or corrugated
surface as well as a skeletal morphology, composed
of iron oxides (magnetite, maghemite, and magnesioferrite)
that occurred in the form of incrustation on the
surface of mullite, amorphous silica, or aluminosilicate
particles. The TMPs observed in fly ash from lignite
combustion have a similar morphological form but a
different mineralogical composition. Instead of magnetite
and magnesioferrite, maghemite and hematite with
lower χ values were the prevailing magnetic minerals,
which explains the much lower magnetic susceptibility
of this kind of ash in comparison with the ash from hard
coal combustion, and probably results from the lower
temperature of lignite combustion. Morphology and
mineralogical composition of TMPs in cement dust is
more diverse. The magnetic fraction of cement dust
occurs mostly in the form of angular and octahedral
grains of a significantly finer granulation (<20 μm);
however, spherules are also present. Avery characteristic
magnetic form for cement dust is calcium ferrite
(CaFe3O5). The greatest impact on the magnetic susceptibility
of cement dust results from iron-bearing additives
(often waste materials from other branches of
industry), which should be considered the most dangerous
to the environment. Stoichiometric analysis of
micro-particles confirmed the presence of heavy metals
such as Pb, Mn, Cd, and Zn connected with TMPs,
which are carriers of magnetic signals in atmospheric
dust. Therefore, in some cases, their presence in topsoil
when detected by magnetic measurement can be treated
as an indicator of inorganic soil contamination. | pl_PL |
dc.language.iso | en | pl_PL |
dc.rights | Uznanie autorstwa 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/pl/ | * |
dc.subject | Alkaline dusts | pl_PL |
dc.subject | Magnetic susceptibility | pl_PL |
dc.subject | Technogenic magnetic particles | pl_PL |
dc.subject | Iron mineralogy | pl_PL |
dc.title | Technogenic magnetic particles in alkaline dusts from power and cement plants | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.relation.journal | Water, Air, and Soil Pollution | pl_PL |
dc.identifier.doi | 10.1007/s11270-012-1389-9 | - |
Pojawia się w kolekcji: | Artykuły (WNP)
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