USE OF VIBRIO-HARVEYI IN AN AQUATIC BIOLUMINESCENT TOXICITY TEST TO ASSESS THE EFFECTS OF METAL TOXICITY - TREATMENT OF SAND AND WATER-BUFFER, WITH AND WITHOUT EDTA

This investigation evaluated the effects of sand and EDTA on the toxic ity of 24 metallic salts on the bioluminescent bacterium Vibrio harvey i, Toxicity end points were reported as either median effective concen tration (EC50) or effective concentration at 20%. Sand and EDTA indivi dually and in sequential combination generally reduced toxicity of met als tested in this system. When comparing treatments of sand without E DTA and sand/EDTA, some chemicals exhibited lower toxicity while other s had increased toxicity. Each chemical appears to have its own unique characteric for toxicity when evaluated using the test conditions wit h this organism. (C) 1997 by John Wiley & Sons, Inc.