Thallium and co-genetic trace elements in hydrothermal Fe-Mn deposits of Central Spain

Garrido, Fernando; García-Guinea, Javier; López-Arce, Paula; Voegelin, Andreas; Göttlicher, Jörg; Mangold, Stefan; Almendros, G.

doi:10.1016/j.scitotenv.2020.137162

Cited by 27 publications

(1 citation statement)

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“…The dumps and sludges which are present, as well as the operation of a coal-fired power plant from 1976 to 2020 within 50 km [ 112 ] of the study area, may be responsible for the Tl presence in our study area. A similar situation is reported by other authors [ 113 ]. Despite its toxicity, Tl is not very mobile, and although in this work the speciation of the elements present has not been studied, it is likely that the chemical species involved is Tl (I) since it has been detected (data not published) by Laser-Induced Breakdown Spectroscopy (LIBS) at a wavelength of 323 nm.…”

Section: Discussionsupporting

confidence: 92%

Status of Ecosystem Services in Abandoned Mining Areas in the Iberian Peninsula: Management Proposal

González-Morales

Rodríguez-González

Fernández‐Pozo

2023

Toxics

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An abandoned sphalerite mining area in the southwest (SW) of the Iberian Peninsula was studied to evaluate the impact that the presence of metal(loid)s has on soil and ecosystem health. Five zones were delimited: sludge, dump, scrubland, riparian zone, and dehesa. Critical total levels of lead (Pb), zinc (Zn), thallium (Tl), and chromium (Cr), well above the limit indicative of toxicity problems, were found in the areas close to the sources of contamination. Pb-Zn concentrations were very high in the riparian zone, reaching values of 5875 mg/kg Pb and 4570 mg/kg Zn. The whole area is classifiable as extremely contaminated with Tl, with concentrations above 370 mg/kg in the scrubland. Cr accumulation mainly occurred in areas away from the dump, with levels up to 240 mg/kg in the dehesa. In the study area, several plants were found growing luxuriantly despite the contamination. The measured metal(loid)s content is the cause of a significant decrease in ecosystem services, resulting in unsafe soils for food and water production, so the implementation of a decontamination program is advisable. The plant species Retama sphaerocarpa, present in the sludge, scrubland, riparian zone, and dehesa, is postulated as suitable for use in phytoremediation.

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Section: Discussionsupporting

confidence: 92%