The Distribution of Zr, Hf and Y in the soils of Iaşi Municipality: Case Study
Journal Title: Analele stiintifice ale Universitatii "Alexandru Ioan Cuza" din Iasi - seria Geologie - Year 2016, Vol 62, Issue 1
Abstract
Zr, Hf and Y contents were determined via 54 samples collected from the topsoils of the Botanical Garden in Iaşi. Statistical parameters suggest the presence of a relatively homogeneous population whose mean values (Zr = 265.733 mg·kg-1, Hf = 7.287 mg·kg-1, Y= 27.524 mg·kg-1) fall within the Zr, Hf and Y content variation range, determined in other urban soils in the world, but they are higher than the mean values calculated by various authors for the upper continental crust. Although positive, the correlation coefficients have significant values only for Zr–Hf (0.539) and Zr–Y (0.325). The values of the geochemical background determined via the upper 95% confidence limit of the 95th percentile, namely 267.174 mg·kg-1 (Zr), 7.297 mg·kg-1 (Hf) and 34.079 mg·kg-1 (Y), are higher than the mean calculated values for the upper continental crust. The distribution of values of the Zr·Hf-1, Zr·Y-1 and Hf·Y-1 ratios reflects, first of all, the geochemical characteristics of the predominant lithology, namely loesses in the northern area and clays in the southern area, potential anthropic inputs being limited to fertilizers specific to the flora in the Botanical Garden.
Authors and Affiliations
Laviniu Apostoae
Keywords
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