Geochemical Studies and Elemental Contaminants in the Bay of the City of Asuncion
Geochemical Studies and Elemental Contaminants in the Bay of the City of Asuncion作者机构：National University of Asunci6n-Hydroconsult Asunci6n 980 Paraguay Jozef Stefan Institute Ljubljana I000 Slovenia
出 版 物：《Journal of Chemistry and Chemical Engineering》 (化学与化工（英文版）)
年 卷 期：2013年第7卷第11期
页 面：1060-1067页
学科分类：0710[理学-生物学] 071010[理学-生物化学与分子生物学] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学]
主 题：Bottom sediments Asuncion Bay XRF LREE Paraguay River.
摘 要：Minor and trace elements composition of bottom sediments from the bay of Asunci6n on the Paraguay River have been investigated by XRF （X-ray fluorescence） techniques to determine their correlation as well as provenance. The analysis of complex spectra was performed by the AXIL software and the quantitative analysis by the QAES （quantitative analysis of environmental samples ） software. Analyzed trace elements were the refractory elements Rb, Sr, Y, Zr, Nb, Ba, La, Ce, Pr, Nd, Zr, Th and others with high field stabilization energy as Cr, Ni, Cu, together with Zn, As, Cd, Pb. Minor elements were Ti, Mn, Fe which are often to the above refractories related. According to their normalized spidergrams, two sets of sediments can be differentiated. Those that show LREE （light rare earth elements） enrichment, negative Nb and Ti anomalies and no spike at Zr and those that have spidergrams very alike, with strong negative anomalies at Nb, Nd and Ti whereas a of Fe versus the refractory elements except Fe-Zr in which correlation seem to be low. positive spike at Zr. In both set, there are strong correlations is negative. Potential hazards of toxic elements in sediments
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