UV-B-Induced Acute Toxicity of Pyrene to the Waterflea Daphnia magna in Natural Freshwatrers

摘要

The effects of various water characteristics in natural freshwaters on the acute toxicity of one polycyclic aromatic hydrocarbon (PAH), pyrene, to a pelagic invertebrate Daphnia magna was studied under ultraviolet B (UV-B) radiation and in the dark. Pyrene was photoactivated and was more toxic to D-magna in the presence of UV-B radiation. Dissolved organic material (DOM), measureed as dissolved organic carbon (DOC), significantly reduced the photoenhanced toxicity of pyrene.