Toxicity and Fate Comparison between Several Brass and Titanium Dioxide Powders.

摘要

Brass flakes (MD Both Industries, Ashland, MA), SF-150 Rich Gold, and four brands of titanium dioxide were tested to determine their toxicities to Daphnia magna (water flea), Ankistrodesmus falcatus (green algae), and Selenastrum capricornutum (green algae). The toxicity of the brass materials were ranked high, having EC50S below 1 mg/L for daphnia and algae. The fate of the brass materials were determined in fresh water of varying hardness, in synthetic marine salt water (30 ppt), and in physiological saline solution (9 ppt). The titanium dioxide materials were nontoxic to daphnia up to 1000 mg/L. Daphnia were able to ingest titanium dioxide and pack the entire gut without showing any apparent effects. Daphnia, Algae, EC50, Aquatic toxicity.