RT Journal Article
T1 Mobility of antimony in contrasting surface environments of a mine site: influence of redox conditions and microbial communities
A1 Peco, Jesús Daniel
A1 Thouin, Hugues
A1 Esbrí Víctor, José María
A1 Campos Rodríguez, Héctor Ricardo
A1 García Noguero, Eva María
A1 Breeze, Dominique
A1 Jaime Villena, 
A1 Gloaguen, Eric
A1 Higueras, Pablo
A1 Battaglia Brunet, Fabienne
AB Microbial processes can influence the complex geochemical behaviour of the toxic metalloid antimony (Sb) in mining environments. The present study is aimed to evaluate the influence of microbial communities on the mobility of Sb from solid phases to water in different compartments and redox conditions of a mining site in southwest (SW) Spain. Samples of surface materials presenting high Sb concentrations, from two weathered mining waste dumps, and an aquatic sediment were incubated in slurries comparing oxic and anoxic conditions. The initial microbial communities of the three materials strongly differed. Incubations induced an increase of microbial biomass and an evolution of the microbial communities’ structures and compositions, which diverged in different redox conditions. The presence of active bacteria always influenced the mobility of Sb, except in the neutral pH waste incubated in oxic conditions. The effect of active microbial activities in oxic conditions was dependent on the material: Sb oxic release was biologically amplified with the acidic waste, but attenuated with the sediment. Different bacterial genera involved in Sb, Fe and S oxidation or reduction were present and/or grew during incubation of each material. The results highlighted the wide diversity of microbial communities and metabolisms at the small geographic scale of a mining site and their strong implication in Sb mobility.
PB Springer
SN 0944-1344
YR 2023
FD 2023-09-18
LK https://hdl.handle.net/20.500.14352/88499
UL https://hdl.handle.net/20.500.14352/88499
LA eng
NO Agencia Estatal de Investigación
NO ANR
NO Ministerio de Universidades
NO European Union
DS Docta Complutense
RD 10 abr 2025