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	Assessment of geochemical and sedimentological characteristics of atmospheric dust in Shiraz,southwest Iran
	Torghabeh Amir Karimian; Pradhan Biswajeet; Jahandari Ashkan
来源期刊	Geoscience Frontiers
ISSN	1674-9871
出版年	2020
卷号	11 期号:3 页码:783-792
英文摘要	Geogenic dust is commonly believed to be one of the most important environmental problems in the Middle East.The present study investigated the geochemical characteristics of atmospheric dust particles in Shiraz City (south of Iran).Atmospheric dust samples were collected through a dry collector method by using glass trays at 10 location sites in May 2018.Elemental composition was analysed through inductively coupled plasma optical emission spectrometry.Meteorological data showed that the dustiest days were usually in spring and summer,particularly in April.X-ray diffraction analysis of atmospheric dust samples indicated that the mineralogical composition of atmospheric dust was calcite + dolomite (24%)>palygorskite (18%)>quartz (14%)>muscovite (13%)>albite (11%)>kaolinite (7%)>gypsum (7%)>zircon = anatase (3%).The high occurrence of palygorskite (16%-23%) could serve as a tracer of the source areas of dust storms from the desert of Iraq and Saudi Arabia to the South of Iran.Scanning electron microscopy indicated that the sizes of the collected dust varied from 50 m to 0.8 m,but 10 m was the predominant size.The atmospheric dust collected had prismatic trigonal-rhombohedral crystals and semi-rounded irregular shapes.Moreover,diatoms were detected in several samples,suggesting that emissions from dry-bed lakes,such as Hoor Al-Azim Wetland (located in the southwest of Iran),also contributed to the dust load.Backward trajectory simulations were performed at the date of sampling by using the NOAA HYSPLIT model.Results showed that the sources of atmospheric dust in the study area were the eastern area of Iraq,eastern desert of Saudi Arabia,Kuwait and Khuzestan Province.The Ca/Al ratio of the collected samples (1.14) was different from the upper continental crust (UCC) value (UCC = 0.37),whereas Mg/Al (0.29),K/Al (0.22) and Ti/Al (0.07) ratios were close to the UCC value (0.04).This condition favours desert calcisols as the main mineral dust sources.Analysis of the crustal enrichment factor (EF_(crustal)) revealed geogenic sources for V,Mo,Pb,Sr,Cu and Zn (<2),whereas anthropogenic sources affected As,Cd,Cr and Ni.
英文关键词	Dust storm Atmospheric dust Heavy metals Diatom Palygorskite Provenance
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:6721455
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336281
作者单位	Torghabeh Amir Karimian, Department of Earth Sciences,Faculty of Sciences,Shiraz University, Shiraz, Iran.; Pradhan Biswajeet, The Centre for Advanced Modeling and Geospatial Information Systems (CAMGIS),Faculty of Engineering and IT,University of Technology Sydney;;Department of Energy and Mineral Resources Engineering,Sejong University, ;;, Sydney;;Seoul, Australia;;South Korea NSW2007;;05006.; Jahandari Ashkan, Department of Geology,Shahid Bahonar University of Kerman, Kerman, Iran.
推荐引用方式 GB/T 7714	Torghabeh Amir Karimian,Pradhan Biswajeet,Jahandari Ashkan. Assessment of geochemical and sedimentological characteristics of atmospheric dust in Shiraz,southwest Iran[J],2020,11(3):783-792.
APA	Torghabeh Amir Karimian,Pradhan Biswajeet,&Jahandari Ashkan.(2020).Assessment of geochemical and sedimentological characteristics of atmospheric dust in Shiraz,southwest Iran.Geoscience Frontiers,11(3),783-792.
MLA	Torghabeh Amir Karimian,et al."Assessment of geochemical and sedimentological characteristics of atmospheric dust in Shiraz,southwest Iran".Geoscience Frontiers 11.3(2020):783-792.