@misc{10481/76691,
year = {2022},
url = {http://hdl.handle.net/10481/76691},
abstract = {Polluted soil is an important source of exposure to potentially toxic elements (PTEs) for humans, especially in
urban areas. We studied the fate of PTEs in the total (<2 mm) and fine (<50 μm) fractions of urban soils in
playgrounds, passing areas, and vacant lots of the historic mining village of Minas de Riotinto in SW Spain. The
mineralogical and chemical observations included analysis by scanning electron microscopy, electron backscatter
diffraction, X-ray diffraction, chemical analysis of Al, V, Cr, Mn, Co, Ni, Cu, Zn, Rb, Sr, As, Cd, Ba, Tl, and
Pb after acid digestion by Inductively Coupled Plasma-Mass Spectrometry and Sb by X-ray fluorescence.
The total and fine fractions of natural and mixed (consisting of natural soils and aggregate pavements) urban
soils have significantly higher concentrations of sulfide-associated PTEs (Ni, Cu, Zn, As, Sb, and Pb) and Ba in
comparison to the aggregate pavements. Most of the natural and mixed urban soils surpass the regulatory levels
set by the regional Government for As and Pb to declare a soil as contaminated. This work highlights the
mineralogical source of PTEs in the urban soils. Primary geogenic sulfide minerals are prone to oxidation promoting
dissolution of PTEs and acid generation in the future. Additionally, for the first time, we have described
arsenian plumbojarosite and beudantite in urban soils which are abundant secondary phases under the circumneutral
pH conditions, effectively retaining As and Pb. Inhalable small PTE-rich particles (<10 μm) are
present in many soils in playgrounds and garden areas potentially posing health risk to residents upon dusting
and resuspension in the air.},
keywords = {Arsenian plumbojarosite},
keywords = {Beudantite},
keywords = {Soil geochemistry},
keywords = {Environmental mineralogy},
keywords = {Mining area},
title = {Mineralogical association and geochemistry of potentially toxic elements in urban soils under the influence of mining},
doi = {https://doi.org/10.1016/j.catena.2022.106517},
author = {Parviainen, Annika Jenni Johana and Vázquez Arías, Antón and Martín Peinado, Francisco},
}