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Resumen del producto
Becerra Rueda, O.F., A., Sánchez González, A.J., Marmolejo Rodríguez & V.R., Magallanes Ordóñez
(2013).
Stable isotopes of nitrogen in plants of contaminated soils and sediments by an abandoned gold mine.
AGU Meeting of the Americas.
Cancun, Quintana Roo, México, México, mayo 14 - 17, 2013,
1.
Stable isotopes of nitrogen in plants of contaminated soils and sediments by an abandoned gold mine
Oscar Fernando Becerra Rueda, Alberto Sánchez González, Ana Judith Marmolejo Rodríguez y Víctor René Magallanes Ordóñez
Mining industry is an economic activity which generates high ecological impact. In the mining district "El Triunfo", the concentration of potential toxic elements (PTE: As, Cd, Hg, Sb) have exceeded 50 times allowable limits. Nowadays, environmental pollution levels can be evaluated through the use of stable isotopes of N. For this, isotopic analysis of nitrogen and concentrations of metals and metalloids were considered in the area where plants are exposed (Prosopis spp., Parkinsonia spp. and Salicornia spp.) Polluted sediments were collected over 48 km of the Las Gallinas-El Hondo-El Carrizal arroyo. PTE concentrations, with a previous acidic digestion (HF, HCl, HNO3 and H2SO4) were determined by ICP-MS. As and Sb were determined by NAA. For N isotopes, obtained samples were grounded to fine powder in an agate mortar with an acetone rinse between samples then analyzed by an EA-IRMS. Results showed that plants growing on the tailings decreased their ?15N proportionally to the metal concentration in the área.
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