Toxicity identification evaluation of Lake Orta (Northern Italy) sediments using the Microtox system.
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.
Guzzella
L
L
Water Research Institute-CNR, via della Mornera 25, Brugherio Milan, 20047, Italy.
Bartone
C
C
Ross
P
P
Tartari
G
G
Muntau
H
H
D000641:Ammonia / Q000032:analysis; D001419:Bacteria / Q000187:drug effects / Q000378:metabolism; D003300:Copper / Q000032:analysis; D004492:Edetic Acid / Q000737:chemistry; D005618:Fresh Water / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007558:Italy; D008670:Metals / Q000032:analysis; D011786:Quality Control; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000633:toxicity
D007220:Industrial Waste; D008670:Metals; D014874:Water Pollutants, Chemical; D000641:Ammonia; D003300:Copper; D004492:Edetic Acid