AS ASSESSMENT OF THE TOXICITY OF PHTHALATE ESTERS TO FRESHWATER BENTHOS. 1. AQUEOUS EXPOSURES

摘要

Tests were performed with the freshwater invertebrates Hyalella azteca, Chironomus tentans, and Lumbriculus variegatus to determine the acute toxicity of six phthalate esters, including dimethyl phthalate(DMP), diethyl phthalate(DEP), di-n-butyl phtnalate(DBP), butybenzyl phthalate(BBP), di-n-hexyl phthalate(DHP), and di-2-ethylhexyl phthalate(DEHP). It was possible to derive 10-d LC50 (lethal concentration for 50/100 of the population)values only for the four lower molecular weight esters(DMP, DEP, DBP, and BBP), for which toxicity increased with increasing octanol-water partition coefficient(K_ow) and decreasing water Solubility.