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Historical anthropogenic mercury in two lakes of Central Chile: comparison between an urban and rural lake.
Álvarez, Denisse; Torrejón, Fernando; Climent, María José; Garcia-Orellana, Jordi; Araneda, Alberto; Urrutia, Roberto.
Afiliación
  • Álvarez D; Aquatic Systems Research Unit, Faculty of Environmental Sciences, EULA-Chile, Universidad de Concepción, Casilla 160-C, Barrio Universitario s/n, Concepción, Chile. dealvarez@udec.cl.
  • Torrejón F; Facultad de Ciencias, Universidad Santo Tomás, Concepción, Chile. dealvarez@udec.cl.
  • Climent MJ; Aquatic Systems Research Unit, Faculty of Environmental Sciences, EULA-Chile, Universidad de Concepción, Casilla 160-C, Barrio Universitario s/n, Concepción, Chile.
  • Garcia-Orellana J; Aquatic Systems Research Unit, Faculty of Environmental Sciences, EULA-Chile, Universidad de Concepción, Casilla 160-C, Barrio Universitario s/n, Concepción, Chile.
  • Araneda A; Departament de Física, Facultat de Ciències, Universitat Autònoma de Barcelona, Barcelona, Spain.
  • Urrutia R; Institut de Ciència i Tecnologia Ambientals (ICTA), Universitat Autònoma de Barcelona, Barcelona, Spain.
Environ Sci Pollut Res Int ; 25(5): 4596-4606, 2018 Feb.
Article en En | MEDLINE | ID: mdl-29192400
Mercury concentrations in the environment tend to decrease in recent years due to environmental restrictions. Lakes store mercury in their sediments, making them potential secondary contamination sources. In South America, the occurrence of mercury in lake systems has been associated mainly with volcanic emissions and only few records anthropogenic contamination in the pre-Hispanic period. The objective of this research was to study historical anthropogenic mercury concentration in two lakes in Central Chile (La Señoraza and Pillo), in order to establish background mercury levels and their variations from preindustrial to modern periods. Different background levels and mercury concentrations were found in each lake, with significantly higher concentrations in Lake La Señoraza during the last 150 years. Mining-related activities during the nineteenth century could have a negligible influence on mercury concentrations. Later on, the use of coal railroads and subsequent employment of mercury in the cellulose industry were associated with three- and fourfold increases in mercury concentration over the nineteenth century background levels, which decrease once these activities ceased. However, in the case of Lake Pillo, an important increase in mercury concentration can be observed between 1990 and the early twenty-first century, which could be related to a higher watershed/lake area ratio, extensive agriculture, and volcanic emission, being the latter that could have contributed with mercury to both systems. Nevertheless, sedimentological characteristics in Lake Pillo can be favorable to retain mercury in this aquatic system up to the present day.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Lagos / Monitoreo del Ambiente / Sedimentos Geológicos / Mercurio País/Región como asunto: America do sul / Chile Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2018 Tipo del documento: Article País de afiliación: Chile Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Lagos / Monitoreo del Ambiente / Sedimentos Geológicos / Mercurio País/Región como asunto: America do sul / Chile Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2018 Tipo del documento: Article País de afiliación: Chile Pais de publicación: Alemania