Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jaridenv.2007.12.007 |
Trace element variation in size-fractionated African desert dusts | |
Castillo, Sonia1; Moreno, Teresa1; Querol, Xavier1; Alastuey, Andres1; Cuevas, Emilio2; Herrmann, Ludger3; Mounkaila, Mohammed3; Gibbons, Wes | |
通讯作者 | Moreno, Teresa |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS |
ISSN | 0140-1963 |
EISSN | 1095-922X |
出版年 | 2008 |
卷号 | 72期号:6页码:1034-1045 |
英文摘要 | Desert particulate samples from locations in the Sahara-Sahel dust corridor (Western Sahara, Algeria, Chad and Niger) were segregated into size fractions ranging from < 1.5 to > 20 mu m and analysed using inductively coupled plasma atomic emission spectrometry (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS). The size-fractionated samples contain higher concentrations of Al, Na, Mg, Fe and most trace elements in the finer, phyllosilicate-rich materials. A notable exception is provided by Zr and Hf, which concentrate in the coarser fractions due to a higher abundance of coarse detrital zircon. Equally explicable by natural processes are enrichments (relative to the average tipper continental crust) in incompatible trace elements with higher ionic potential (Nb, Ce, La), these being more resistant to chemical weathering. In contrast, samples show a relative loss of large ion lithophile elements (Rb, Cs and Ba), and the more calcareous samples show relative enrichment in Sr and depletion in Nb. However, not all the geochemical variations exhibited by these samples are easily explicable by invoking "natural" geochemical processes: anomalous concentrations of several transition metals (Zn, Pb, Cd) can be attributed to anthropogenic pollution, and enrichments in Cr, Ni and Mo are due to abrasive interaction between the siliceous dust sample and the fractionation equipment. (C) 2008 Elsevier Ltd. All rights reserved. |
英文关键词 | Sahara-Sahel dust corridor atmospheric aerosol geochemistry size fractionation |
类型 | Article |
语种 | 英语 |
国家 | Spain ; Germany |
收录类别 | SCI-E |
WOS记录号 | WOS:000255980400014 |
WOS关键词 | SAHARAN AIR LAYER ; MINERAL AEROSOLS ; RED RAINS ; ATLANTIC ; CLIMATE ; SPAIN ; TRANSPORT ; SOILS ; PARTICULATE ; INDICATORS |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/157936 |
作者单位 | 1.CSIC, Inst Earth Sci Jaume Almera, E-08028 Barcelona, Spain; 2.INM, Izana Atmospher Observ, Santa Cruz de Tenerife 38071, Spain; 3.Uni Hohenheim, Inst Soil Sci & Land Evaluat 310, D-70593 Stuttgart, Germany |
推荐引用方式 GB/T 7714 | Castillo, Sonia,Moreno, Teresa,Querol, Xavier,et al. Trace element variation in size-fractionated African desert dusts[J],2008,72(6):1034-1045. |
APA | Castillo, Sonia.,Moreno, Teresa.,Querol, Xavier.,Alastuey, Andres.,Cuevas, Emilio.,...&Gibbons, Wes.(2008).Trace element variation in size-fractionated African desert dusts.JOURNAL OF ARID ENVIRONMENTS,72(6),1034-1045. |
MLA | Castillo, Sonia,et al."Trace element variation in size-fractionated African desert dusts".JOURNAL OF ARID ENVIRONMENTS 72.6(2008):1034-1045. |
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