Authors: Boyang Huang Dinglong Li Yan Yang
Publish Date: 2016/07/06
Volume: 97, Issue: 3, Pages: 380-386
Abstract
Dinbutyl phthalate DBP and di2ethylhexyl phthalate DEHP are two widely used phthalates while CuII is a common valence state of copper They have been ubiquitously detected in the aquatic environment but information on their joint toxicity to aquatic organisms is scarce In this study we evaluated the combined effects of copper and these two phthalates to Daphnia magna and Photobacterium phosphoreum by quantifying the acute toxicity expressed by the EC50 the concentration causing 50 of maximal effect value The toxicity order was DEHP + CuII DBP + CuII CuII DEHP DBP for both test species Antagonism effects were found in the joint toxicity of CuII combined with DBP or DEHP using the toxic unit method These findings have important implications in environmental risk assessment for phthalates in the aquatic environment in the presence of heavy metals
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