A 48-h acute toxicity test was conducted exposing the cladoceran, Daphnia magna, to five concentrations of phenanthrene. Renewal of exposure solutions of phenanthrene was done every 24-h.

Simultaneous 48-h static acute toxicity tests were conducted exposing the cladoceran, Daphnia magna, to silver solutions with four test conditions. The tests consisted of exposing test organisms to aged test solutions ...