Nickel and vanadium concentrations and its relation with sediment acute toxicity.
Sediments from Pánuco River historically have contained elevated levels of numerous contaminants that may pose risks to ecological receptors and humans. Sediments were sampled and characterized to determine the acute sediment toxicity and its relationship with contaminants. Results demonstrated that toxicity was significantly correlated with fitness index (r = 0.82, p < 0.001), TOC (r = 0.55, p < 0.5), Ni (r = 0.95, p < 0.001), and V (r = 0.93, p < 0.001), but not with PAHs (r = 0.20, p < 0.5) during rainy and dry seasons. Although a great heterogeneity exists, the river outlet presents the biggest problems, due to dredging allow the metal desorption from solid to water phase, increasing the metal bioavailability.
Amezcua-Allieri
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Safety and Environment Department, Mexican Petroleum Institute, Eje Central Lázaro Cárdenas No. 152, Colonia San Bartolo Atepehuacan, C.P. 07730, Mexico, DF, Mexico. mamezcua@imp.mx
Salazar-Coria
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D001681:Biological Assay; D019015:Geologic Sediments / Q000737:chemistry*; D020128:Inhibitory Concentration 50; D008163:Luminescent Measurements / Q000379:methods; D009532:Nickel / Q000032:analysis* / Q000633:toxicity; D045483:Rivers / Q000737:chemistry; D012621:Seasons; D012989:Soil Pollutants / Q000032:analysis* / Q000633:toxicity; D023382:Toxicity Tests, Acute; D017968:Vanadium Compounds / Q000032:analysis* / Q000633:toxicity; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000633:toxicity
D012989:Soil Pollutants; D017968:Vanadium Compounds; D014874:Water Pollutants, Chemical; D009532:Nickel