Abstract
AbstractMining activities are one of the main contributors to metals contamination of soils, most often due to the inappropriate management of the mining residues. In Italy, hundreds of small mining sites are scattered around the mountainous areas, near small villages with fragile environments. Here, wastes and residues may have polluted the surrounding soils and become a threat to living organisms. We investigated two dismissed sites in Northern Italy with extractive wastes in unmanaged areas close to villages using bioaccessibility and size fractionation methods, focussing on particles that can potentially be eroded and/or ingested (< 10 µm and < 200 µm). In the Campello Monti site, Co, Cu and Ni showed high values in soils near the landfills, with the highest concentrations in the < 10 µm particles around the landfills and along the valley bottom. Lead and Ni were the most bioaccessible metals. In the Plassa site, Cd and Zn were the most important contaminants, with an average content of 118 and 34,000 mg/kg. They originated from mining wastes scattered through the slope and had a particularly high bioaccessible fractions, close to the 100% for Zn and above 80% for Cd in the fine particles. The study of the fine, more reactive and mobile particles offered a close insight into the lability of contaminants, as in both sites, a dispersion of metal contaminants through very fine particles in surrounding and downhill areas was observed, resulting in an increased risk to all living organism and for the environment.
Funder
Horizon 2020
H2020 Marie Skłodowska-Curie Actions
Università degli Studi di Torino
Publisher
Springer Science and Business Media LLC
Subject
General Agricultural and Biological Sciences,Environmental Chemistry,Environmental Engineering
Reference44 articles.
1. Ajmone-Marsan F, Biasioli M, Kralj T, Grčman H, Davidson CM, Hursthouse AS, Madrid L, Rodrigues S (2008) Metals in particle-size fractions of the soils of five European cities. Environ Pollut 152:73–81. https://doi.org/10.1016/j.envpol.2007.05.020
2. Ajmone-Marsan F, Padoan E, Madrid F, Vrščaj B, Biasioli M, Davidson CM (2019) Metal release under anaerobic conditions of urban soils of four European cities. Water Air Soil Pollut 230(3):53. https://doi.org/10.1007/s11270-019-4101-5
3. Alloway BJ (2013) Heavy metals in soils. Trace metals and metalloids in soils and their bioavailability. Springer, Dordrecht
4. Assereto R, Jadoul F, Ometto P (1977) Stratigrafia e metallogenesi del settore occidentale del distretto a Pb, Zn, fluorite e barite di Gorno (Alpi Bergamasche). Riv Ital Paleontol Stratigr 83:395–532 (in Italian)
5. Bakircioglu D, Bakircioglu KY, Ibar H (2011) Investigation of trace elements in agricultural soils by BCR sequential extraction method and its transfer to wheat plants. Environ Monit Assess 175:303–314. https://doi.org/10.1007/s10661-010-1513-5
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