Assessment of chemical and mineralogical characteristics of airborne dust in the Sistan region, Iran

Show simple item record Rashki, Alireza Eriksson, Patrick George Rautenbach, Cornelis Johannes de Wet Kaskaoutis, Dimitris G. Grote, Wiebke Dykstra, J. 2014-10-23T08:09:01Z 2014-10-23T08:09:01Z 2013-01
dc.description.abstract Windblown transport and deposition of dust is widely recognized as an important physical and chemical concern to climate, human health and ecosystems. Sistan is a region located in southeast Iran with extensive wind erosion, severe desertification and intense dust storms, which cause adverse effects in regional air quality and human health. To mitigate the impact of these phenomena, it is vital to ascertain the physical and chemical characteristics of airborne and soil dust. This paper examines for the first time, the mineralogical and chemical properties of dust over Sistan by collecting aerosol samples at two stations established close to a dry-bed lake dust source region, from August 2009 to August 2010. Furthermore, soil samples were collected from topsoil (0–5 cm depth) at several locations in the dry-bed Hamoun lakes and downwind areas. These data were analyzed to investigate the chemical and mineralogical characteristics of dust, relevance of inferred sources and contributions to air pollution. X-ray Diffraction (XRD) analysis of airborne and soil dust samples shows that the dust mineralogy is dominated mainly by quartz (30–40%), calcite (18–23%), muscovite (10–17%), plagioclase (9–12%), chlorite ( 6%) and enstatite ( 3%), with minor components of dolomite, microcline, halite and gypsum. X-ray Fluorescence (XRF) analyses of all the samples indicate that the most important oxide compositions of the airborne and soil dust are SiO2, CaO, Al2O3, Na2O, MgO and Fe2O3, exhibiting similar percentages for both stations and soil samples. Estimates of Enrichment Factors (EFs) for all studied elements show that all of them have very low EF values, suggesting natural origin from local materials. The results suggest that a common dust source region can be inferred, which is the eroded sedimentary environment in the extensive Hamoun dry lakes lying to the north of Sistan. en_US
dc.description.librarian hb2014 en_US
dc.description.uri en_US
dc.identifier.citation Rashki, A, Eriksson, PG, Rautenbach, CJ de W, Kaskaoutis, DG, Grote, W & Dykstra, J 2013, 'Assessment of chemical and mineralogical characteristics of airborne dust in the Sistan region, Iran', Chemosphere, vol. 90, no. 2, pp. 227-236. en_US
dc.identifier.issn 0045-6535 (print)
dc.identifier.issn 1879-1298 (online)
dc.identifier.other 10.1016/j.chemosphere.2012.06.059
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.rights © 2012 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Chemosphere. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemosphere, vol. 90, no. 2, pp. 227-236, 2013. doi : 10.1016/j.chemosphere.2012.06.059. en_US
dc.subject Aeolian dust en_US
dc.subject Dust chemistry en_US
dc.subject Mineralogical composition en_US
dc.subject Hamoun lakes en_US
dc.subject Sistan en_US
dc.subject Iran en_US
dc.title Assessment of chemical and mineralogical characteristics of airborne dust in the Sistan region, Iran en_US
dc.type Postprint Article en_US

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