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Toxicity identification evaluation of Lake Orta (Northern Italy) sediments using the Microtox system
L Guzzella1, C Bartone, P Ross
1Water Research Institute-CNR, via della Mornera 25, Brugherio Milan, 20047, Italy.
Ecotoxicology and Environmental Safety
|December 1, 1996
Abstract:
Pore waters extracted by centrifugation from Lake Orta (Northern Italy) sediments were studied with a modified Toxicity Identification Evaluation (TIE) procedure using the Microtox bacterial luminescence toxicity test system. The most toxic pore water samples were from stations near a rayon factory, known as a source of copper and ammonium discharges. The TIE manipulations used were filtration, EDTA chelation, and C18 solid-phase resin adsorption. The most effective treatments to remove toxicity were the EDTA and C18, indicating that both metals and nonpolar organic compounds contribute to the observed toxicity.