干旱区生态环境知识资源中心(Arid): Intrusions of dust and iberulites in Granada basin (Southern Iberian Peninsula). Genesis and formation of atmospheric iberulites

Arid

DOI	10.1016/j.atmosres.2020.105260
	Intrusions of dust and iberulites in Granada basin (Southern Iberian Peninsula). Genesis and formation of atmospheric iberulites
	Parraga, J.; Martin-Garcia, J. M.; Delgado, G.; Molinero-Garcia, A.; Cervera-Mata, A.; Guerra, I.; Fernandez-Gonzalez, M. V.; Martin-Rodriguez, F. J.; Lyamani, H.; Casquero-Vera, J. A.; Valenzuela, A.; Olmo, F. J.; Delgado, R.
通讯作者	Molinero-Garcia, A
来源期刊	ATMOSPHERIC RESEARCH
ISSN	0169-8095
EISSN	1873-2895
出版年	2021
卷号	248
英文摘要	Fourteen samples of deposited atmospheric dust collected during desert dust intrusions over Granada in the summer of 2010 are studied here. During these atmospheric dust events the PM10 ranged from 25 mu g m(-3) to 200 mu g m(-3), surpassing occasionally the standard limit (50 mu g m(-3)) established by the European Union Directive as a risk for the human health. The mineralogical composition of the dust samples is very heterogeneous, showing that the origin of collected particles is from north-northwest of Africa and local/regional soils. The analyzed dust samples contain between 1 and 9% of iberulites, polymineral spherical particles with diameter between 34 and 111 mu m. New compositional results obtained by mapping chemical elements and mineral compositions of iberulites with VPSEM-EDEX technology allowed as to go further than previous studies and provide new insight on the iberulites genesis. The SEM-microstructure analysis of the iberulites and the compositional results obtained by VPSEM-EDEX technique showed that clay and sulphur components are important in determining their spherical shapes. The analysis also shows that iberulites present a typical vortex at one of the poles and an external covering by nano-clays in laminar clusters, a form of rind and a core internal with sizes less than 10 mu m. On the other hand, the micromorphological analysis evidences that the bacteria and its polymeric exudates participate in the iberulite genesis, acting as aggregation agents and contributing to its protection and compensating its fragility. The role of bacteria and its polymeric exudates in the iberulite genesis has not been described previously, and it would explain the flux, transport and survival of tropospheric microorganisms over long distances. These new observations and finding led us to take into account the role of bacteria in iberulite genesis and to reconsider the previous hypothesis regarding the iberulite genesis proposed in previous works.
英文关键词	Saharan dust Iberulites genesis Rare Earth elements Bacterial EPS Human Health
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000594095000003
WOS关键词	AFRICAN DUST ; MINERAL DUST ; RARE-EARTH ; PARTICLES ; SOUTHERN ; OUTBREAKS ; SPAIN ; PM10 ; PRECIPITATION ; DEPOSITION
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328044
作者单位	[Parraga, J.; Martin-Garcia, J. M.; Delgado, G.; Molinero-Garcia, A.; Cervera-Mata, A.; Fernandez-Gonzalez, M. V.; Martin-Rodriguez, F. J.; Delgado, R.] Univ Granada, Fac Pharm, Dept Soil Sci & Agr Chem, Granada, Spain; [Guerra, I.] Ctr Instrumentac Cient, Unidad Microscopia Elect Barrido Alta Resoluc Mic, Granada, Spain; [Lyamani, H.; Casquero-Vera, J. A.; Valenzuela, A.] Univ Granada, IISTA CEAMA, Andalusian Inst Earth Syst Res, Granada 18006, Spain; [Casquero-Vera, J. A.; Valenzuela, A.; Olmo, F. J.] Univ Granada, Dept Appl Phys, Granada 18071, Spain
推荐引用方式 GB/T 7714	Parraga, J.,Martin-Garcia, J. M.,Delgado, G.,et al. Intrusions of dust and iberulites in Granada basin (Southern Iberian Peninsula). Genesis and formation of atmospheric iberulites[J],2021,248.
APA	Parraga, J..,Martin-Garcia, J. M..,Delgado, G..,Molinero-Garcia, A..,Cervera-Mata, A..,...&Delgado, R..(2021).Intrusions of dust and iberulites in Granada basin (Southern Iberian Peninsula). Genesis and formation of atmospheric iberulites.ATMOSPHERIC RESEARCH,248.
MLA	Parraga, J.,et al."Intrusions of dust and iberulites in Granada basin (Southern Iberian Peninsula). Genesis and formation of atmospheric iberulites".ATMOSPHERIC RESEARCH 248(2021).