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标题：A Baseline Study on Levels of Uranium, Thorium and Lead Isotope Ratios in Sediment from the Sebou Estuary in the North-West of Morocco
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作者：N. Ziad ; J. L. Mas ; J. Naouli 等
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2018
卷号：9
期号：5
页码：1562-1567
DOI：10.26872/jmes.2018.9.5.172
出版社：University of Mohammed Premier Oujda
摘要：Inductively coupled plasma – quadruple mass spectrometry was used for determinationof uranium and thorium concentrations and lead isotope compositions in surfacedeposits and a sediment core for the intertidal zone of the Sebou Estuary located in thenorthwestern Morocco. The results showed that U and Th concentrations wererespectively in the ranges of 0.79 to 1.14 μg.g-1 and 3.75 to 5.14 μg.g-1, while thevertical distribution presented important fluctuations throughout the core. Lead isotoperatios (208Pb/204Pb, 206Pb/207Pb and 208Pb/207Pb) did not show any significant spatialvariability along the covered area within the estuary, and the values found werecharacteristic of Pb generated mainly from natural sources. The data produced in thisstudy were the first such data for sediment from the Sebou Estuary, and the resultscould be considered as baseline values for future environmental impact assessments.
关键词：Sebou Estuary; Uranium and thorium; ICP;QMS; Pb;isotopic ratios