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

ZUSAMMENFASSUNG

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.

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

265837

Sigma-Aldrich

Gold, rod, diam. 3.0 mm, 99.99% trace metals basis

265772

Sigma-Aldrich

Gold, powder, <45 μm, 99.99% trace metals basis

326585

Sigma-Aldrich

Gold, powder, <10 μm, ≥99.9% trace metals basis

636347

Sigma-Aldrich

Gold, nanopowder, <100 nm particle size, 99.9% trace metals basis

643203

Sigma-Aldrich

Goldbeschichteter Glasobjektträger, layer thickness 100 Å, 99.999% (Au)

326534

Sigma-Aldrich

Gold, wire, diam. 0.25 mm, ≥99.9% trace metals basis

326542

Sigma-Aldrich

Gold, beads, 1-6 mm, 99.999% trace metals basis

265810

Sigma-Aldrich

Gold, foil, thickness 0.1 mm, 99.99% trace metals basis

643246

Sigma-Aldrich

Goldbeschichteter Glasobjektträger, layer thickness 1000 Å, 99.999% (Au)

GF96742479

Gold, rod, 50mm, diameter 3.0mm, as drawn, 99.95%

349275

Sigma-Aldrich

Gold, foil, thickness 0.05 mm, 99.99% trace metals basis

349283

Sigma-Aldrich

Gold, wire, diam. 0.1 mm, 99.99% trace metals basis

265829

Sigma-Aldrich

Gold, foil, thickness 0.5 mm, 99.99% trace metals basis

310980

Sigma-Aldrich

Gold, wire, diam. 0.5 mm, 99.99% trace metals basis

265799

Sigma-Aldrich

Gold, wire, diam. 1.0 mm, 99.99% trace metals basis

326496

Sigma-Aldrich

Gold, foil, thickness 0.127 mm, 99.99% trace metals basis

349240

Sigma-Aldrich

Gold, foil, thickness 0.25 mm, ≥99.9% trace metals basis

255734

Sigma-Aldrich

Gold, powder, <850 μm, ≥99.99% trace metals basis

373184

Sigma-Aldrich

Gold, evaporation slug, diam. × L 0.3 cm × 0.6 cm, 99.99% trace metals basis

265780

Sigma-Aldrich

Gold, wire, diam. 0.25 mm, 99.99% trace metals basis

349305

Sigma-Aldrich

Gold, wire, diam. 1.0 mm, 99.997% trace metals basis

268461

Sigma-Aldrich

Gold, foil, thickness 0.025 mm, 99.99% trace metals basis

643254

Sigma-Aldrich

Goldbeschichtete Glasabdeckfolie, layer thickness 100 Å, 99.999% (Au), L × W × thickness 22 mm × 22 mm × 130-170 μm, square

349313

Sigma-Aldrich

Gold, wire, diam. 0.5 mm, 99.999% trace metals basis

373168

Sigma-Aldrich

Gold, evaporation slug, diam. × L 0.6 cm × 0.6 cm, 99.99% trace metals basis

GF32175569

Gold, insulated wire, 1m, conductor diameter 0.025mm, insulation thickness 0.005mm, polyester insulation, 99.99%

GF41388767

Gold, insulated wire, 2m, conductor diameter 0.05mm, insulation thickness 0.007mm, polyimide insulation, 99.99%

643289

Sigma-Aldrich

Goldbeschichtete Glasabdeckfolie, 99.999% (Au), diam. × thickness 15 mm × 130-170 μm, layer thickness 100 Å

GF06766713

Gold, insulated wire, 5m, conductor diameter 0.125mm, insulation thickness 0.014mm, polyester insulation, 99.99%

GF49538469

Gold, insulated wire, 2m, conductor diameter 0.05mm, insulation thickness 0.007mm, polyester insulation, 99.99%