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Trace element fixation in sediments rich in organic matter from a saline lake in tropical latitude with hydrothermal inputs (Sochagota Lake, Colombia): The role of bacterial communities.
Cifuentes, Gabriel Ricardo; Jiménez-Millán, Juan; Quevedo, Claudia Patricia; Gálvez, Antonio; Castellanos-Rozo, José; Jiménez-Espinosa, Rosario.
Afiliação
  • Cifuentes GR; Faculty of Sciences and Engineering, Water Resources Research Group, University of Boyacá, 150003 Tunja, Colombia.
  • Jiménez-Millán J; Department of Geology and CEACTEMA, University of Jaén, Campus Las Lagunillas, 23071 Jaén, Spain. Electronic address: jmillan@ujaen.es.
  • Quevedo CP; Faculty of Sciences and Engineering, Water Resources Research Group, University of Boyacá, 150003 Tunja, Colombia.
  • Gálvez A; Microbiology Division, Department of Health Sciences, Campus Las Lagunillas, 23071 Jaén, Spain.
  • Castellanos-Rozo J; Department of Biology and Microbiology, Faculty of Sciences and Engineering, Environmental Management Group, University of Boyacá, 150003 Tunja, Colombia.
  • Jiménez-Espinosa R; Department of Geology and CEACTEMA, University of Jaén, Campus Las Lagunillas, 23071 Jaén, Spain.
Sci Total Environ ; 762: 143113, 2021 Mar 25.
Article em En | MEDLINE | ID: mdl-33131835
We studied the relationships between the trace element concentration in sediments from a saline lake at a tropical latitude (Sochagota Lake, Colombia) containing hydrothermal and anthropic inputs with the organic matter content, the mineral assemblage composition and the activity of the bacterial communities of the sediments. Organic matter-poor sediments (TOC < 0.7%) with quartz and kaolinite near the southern entrance of the lake were enriched in Zr (up to 603 mg/kg) and some major detrital elements (Na, Ti, Al and Si). Fine-sized clay-rich sediments deposited in the deep zones of the lake (central and northern segments) were characterized by substantial organic matter (up to 11.10%) and the crystallization of S-bearing minerals, clay mineral mixed layers and illite. These sediments were enriched in S, Fe, Zn, Mo, Rb, Co, K, Cr, Sb, Ni, As, Ba, Cu, Mn, Pb, P, Mg, and Sr. The presence of Fe sulfide nanoparticles enriched in heavy metals encrusting microbial cells and a dominant sulfate-reducing bacteria (SRB) community (Desulfatiglans, Desulfobacterales and Sva0485) suggested that the precipitation of the hydrothermal S and the accumulation of trace elements in the sediments was regulated by SRB activity. The crystallization of S°, barite and calcite and the good correlations between Ba, Sr and Ca indicated that previously precipitated sulfide can be oxidized by the activity of a relevant sulfur-oxidizing bacterial community (Thioalkalimicrobium, Sulfurovum, Arcobacter and Sulfurimonas), possibly facilitating the release of the metals.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oligoelementos / Poluentes Químicos da Água / Metais Pesados País/Região como assunto: America do sul / Colombia Idioma: En Revista: Sci Total Environ Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Colômbia País de publicação: Holanda
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oligoelementos / Poluentes Químicos da Água / Metais Pesados País/Região como assunto: America do sul / Colombia Idioma: En Revista: Sci Total Environ Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Colômbia País de publicação: Holanda