Toxicity in semiarid sediments influenced by tailings of an abandoned gold mine.

Toxicity in semiarid sediments influenced by tailings of an abandoned gold mine.

Environmental monitoring and assessment (2014-12-20)

A S Sobrino-Figueroa, O F Becerra-Rueda, V R Magallanes-Ordóñez, A Sánchez-González, A J Marmolejo-Rodríguez

ABSTRAKT

The mining district of El Triunfo (ET-MD) has an estimated 800,000 t of mine wastes scattered in the environment, contaminating the sediment with potentially toxic elements such as As, Cd, Pb, and Zn. In order to estimate the toxicity of the sediment to the adjacent biota, the aims of our study are to calculate the mortality and inhibition through bioassays, using sediment, and test organisms such as Daphnia magna and Selenastrum capricornutum (Pseudokirchneriella subcapitata), respectively. The D. magna mortality was 31 ± 12% and the S. capricornutum growth inhibition was 53 ± 24%. The contamination of the sediment determines the high mortality of D. magna and the high inhibition of S. capricornutum in the system, indicating risk for the biota in the contaminated system.

MATERIAŁY

Numer produktu

Marka

Opis produktu

643254

Sigma-Aldrich

Gold coated glass cover slip, layer thickness 100 Å, 99.999% (Au), L × W × thickness 22 mm × 22 mm × 130-170 μm, square

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643203

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Gold coated glass slide, layer thickness 100 Å, 99.999% (Au)

643289

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636347

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Gold, insulated wire, 2m, conductor diameter 0.125mm, insulation thickness 0.016mm, PTFE (polytetrafluoroethylene) insulation, 99.99%

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Gold, insulated wire, 1m, conductor diameter 0.125mm, insulation thickness 0.014mm, polyester insulation, 99.99%

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Gold, insulated wire, 1m, conductor diameter 0.125mm, insulation thickness 0.016mm, PTFE (polytetrafluoroethylene) insulation, 99.99%

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Gold, rod, 10mm, diameter 5.0mm, as drawn, 99.95%

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