Artigo Acesso aberto Revisado por pares

Cuantificación de metales en sedimentos superficiales de la bahía interior, lago Titicaca-Perú

2018; National University of Altiplano, Puno; Volume: 20; Issue: 1 Linguagem: Espanhol

10.18271/ria.2018.326

ISSN

2313-2957

Autores

Edmundo G. Moreno Terrazas, George Argota Pérez, René Alfaro Tapia, M.a Rosa Tera Saavedra, Sabino Atencio Limachi, Gilmar Goyzueta Camacho,

Tópico(s)

Mercury impact and mitigation studies

Resumo

RESUMEN En ecosistemas acuaticos, los sedimentos son reservorios de metales pesados cuando sus aguas se encuentran expuestas. El proposito del estudio fue cuantificar metales en sedimentos superficiales de la bahia interior de Puno, Lago Titicaca-Peru. De enero a noviembre del 2016 fueron analizadas las concentraciones de Cu, Zn, Pb, Cd, As y Hg en los sedimentos superficiales de seis estaciones de muestreo ambiental seleccionadas mediante un muestreo no probabilistico por conveniencia. Los metales se analizaron por digestion acida donde su cuantificacion fue mediante espectrometria de plasma inductivamente acoplado con vista axial (ICP-AES). Al comparar los resultados con la norma ambiental seleccionada (Interim Sediment Quality Guidelin, Canada), todos los elementos presentaron concentraciones en los rangos recomendados, aunque existio entre las estaciones, diferencias estadisticamente significativas (p<0,05). El As y Hg, presentaron similitudes en sus valores (0,0001 mg.L -1 ) entre las estaciones. Se concluyo que, los sedimentos superficiales de la bahia interior de Puno, no representan riesgo por exposicion a metales totales, ya que sus concentraciones se encontraron en el rango de los valores permisibles. Palabras clave : matriz abiotica sedimentaria, metales, toxicidad, ecosistema acuatico, lago ABSTRACT In aquatic ecosystems, sediments are reservoirs of heavy metals when their waters are exposed. The purpose of the study was to quantify metals in surface sediments of the interior bay of Puno, Lake Titicaca, Peru. From january to november 2016 of Cu, Zn, Pb, Cd, As and Hg concentrations were analyzed in the surface sediments of six selected environmental sampling stations by non-probabilistic sampling for convenience. The metals were analyzed by acid digestion where their quantification was by inductively coupled plasma spectrometry with axial view (ICP-AES). When comparing the results with the selected environmental standard, all the elements had concentrations in the recommended ranges, although statistically significant differences existed between the stations (p<0,05). The As and Hg, presented similarities in their values (0,0001 mg.L -1 ) between the stations. As and Hg, presented similarities in their values between the stations. It was concluded that, the surface sediments of the inner bay of Puno do not present risk due to exposure to total metals, since their concentrations were in the range of allowable values. Keywords : abiotic matrix sedimentary, metals, toxicity, aquatic ecosystem, lake

Referência(s)