Evaluation of antimony availability in a mining context: Impact for the environment, and for mineral exploration and exploitation.

Autor: Esbrí JM; Instituto de Geología Aplicada, Escuela de Ingeniería Minera e Industrial de Almadén, Universidad de Castilla-La Mancha, Plaza M. Meca 1, Almadén, Ciudad Real 13400, Spain; Departamento de Mineralogía y Petrología, Universidad Complutense de Madrid, José Antonio Novais 12, 28040 Madrid, Spain. Electronic address: jesbri@ucm.es., Minang CM; Instituto de Geología Aplicada, Escuela de Ingeniería Minera e Industrial de Almadén, Universidad de Castilla-La Mancha, Plaza M. Meca 1, Almadén, Ciudad Real 13400, Spain., Rivera S; Instituto de Geología Aplicada, Escuela de Ingeniería Minera e Industrial de Almadén, Universidad de Castilla-La Mancha, Plaza M. Meca 1, Almadén, Ciudad Real 13400, Spain., Madrid-Illescas M; Instituto de Geología Aplicada, Escuela de Ingeniería Minera e Industrial de Almadén, Universidad de Castilla-La Mancha, Plaza M. Meca 1, Almadén, Ciudad Real 13400, Spain; Departamento de Ingeniería Química, Universidad de Castilla-La Mancha, E.I.M.I. 13400 Almadén, Ciudad Real, Spain., García-Noguero E; Instituto de Geología Aplicada, Escuela de Ingeniería Minera e Industrial de Almadén, Universidad de Castilla-La Mancha, Plaza M. Meca 1, Almadén, Ciudad Real 13400, Spain., González-Valoys A; Instituto de Geología Aplicada, Escuela de Ingeniería Minera e Industrial de Almadén, Universidad de Castilla-La Mancha, Plaza M. Meca 1, Almadén, Ciudad Real 13400, Spain; Centro Experimental de Ingeniería, Universidad Tecnológica de Panamá, Vía Tocumen, 0819-07289 Panama City, Panama., Maguregui M; Departamento de Química Analítica, Universidad del País Vasco, Facultad de Farmacia, P.° de la Universidad, 7, 01006 Vitoria-Gasteiz, Álava, Spain., Thouin H; ISTO, UMR7327, Université d'Orléans, CNRS, BRGM, F-45071 Orléans, France., Battaglia-Brunet F; ISTO, UMR7327, Université d'Orléans, CNRS, BRGM, F-45071 Orléans, France., Gloaguen E; ISTO, UMR7327, Université d'Orléans, CNRS, BRGM, F-45071 Orléans, France., Higueras PL; Instituto de Geología Aplicada, Escuela de Ingeniería Minera e Industrial de Almadén, Universidad de Castilla-La Mancha, Plaza M. Meca 1, Almadén, Ciudad Real 13400, Spain.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2023 Jan; Vol. 311 (Pt 2), pp. 137086. Date of Electronic Publication: 2022 Nov 02.
DOI: 10.1016/j.chemosphere.2022.137086
Abstrakt: This work aims to establish Sb mobility, its transfer to biota and its effect on soil health in a semi-arid climate. The results show the presence of stibnite (Sb 2 S 3 ) as the main primary Sb compound, bindhemite (Pb 2 Sb 2 O 6 (O,OH)), and minor proportions of stibiconite (Sb 3+ (Sb 5+ ) 2 O 6 (OH)) as oxidised Sb species. This research also observes very high total Sb contents in mining materials (max: 20,000 mg kg -1 ) and soils (400-3000 mg kg -1 ), with physical dispersion around mining materials restricted to 450 m. The soil-to-plant transfer is very low, (bioaccumulation factor: 0.0002-0.1520). Most Sb remains in a residual fraction (99.9%), a very low fraction is bound to Fe and Mn oxy-hydroxides or organic matter, and a negligible proportion of Sb is leachable. The higher Sb mobility rates has been found under oxidising conditions with a long contact time between solids and water. The main factors that explain the poor Sb mobility and dispersion in the mining area are the low annual rainfall rates that slow down the Sb mobilisation process and the scarce formation of oxidised Sb compounds. All these data suggest poor Sb (III) formation and a low toxicological risk in the area associated with past mining activities. The low mobility of Sb suggests advantages for future sustainable mining of such ore deposits in a semi-arid climate and is also indicative of the limitations of geochemical exploration in the search for new Sb deposits.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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