Deriving freshwater quality criteria for 2,4,6-trichlorophenol for protection of aquatic life in China.
Freshwater quality criteria of 2,4,6-trichlorophenol (2,4,6-TCP) were developed with particular reference to the aquatic biota in China, and based on USEPA's guidelines. Acute toxicity tests were performed on nine different domestic species indigenous to China to determine 48 h LC(50) and 96 h LC(50) values for 2,4,6-TCP. In addition, 21 d survival-reproduction test with Daphnia magna, 30 d embryo-larval test with Carassius auratus, 60 d fry-juvenile test with Ctenopharyngodon idellus, 30 d early life stage test with Bufo bufo gargarizans and 96 h growth inhibition test with Scenedesmus obliqaus were also conducted to estimate lower chronic limit and upper chronic limit values. The final acute value (FAV) was 2.01 mg/l 2,4,6-TCP. Acute-to-chronic ratios ranged from 5.01 to 12.2. The final chronic value (FCV) and the final plant value (FPV) of 2,4,6-TCP were 0.226 and 2.24 mg/l respectively. Based on FAV, FCV and FPV for 2,4,6-TCP, a criteria maximum concentration of 1.01 mg/l and a criterion continuous concentration of 0.226 mg/l were derived. The results of this study provide useful data for deriving national or local water quality criteria for 2,4,6-TCP based on aquatic biota in China.
Department of Environmental Science of Pollution Control and Resource Reuse, State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210093, Nanjing, China. yindq@nju.edu.cn
Daqiang
D
Yin
Shuangqing
S
Hu
Hongjun
H
Jin
Lingwei
L
Yu
D000818:Animals; D002025:Bufonidae; D002681:China; D002733:Chlorophenols / Q000009:adverse effects*; D003621:Daphnia; D005399:Fishes; D020387:Food Chain; D006054:Goldfish; D017408:Guidelines as Topic; D007313:Insecta; D007814:Larva; D007928:Lethal Dose 50; D009153:Mutagens / Q000009:adverse effects*; D011786:Quality Control; D012016:Reference Values; D018570:Risk Assessment; D014876:Water Pollution / Q000517:prevention & control*
D002733:Chlorophenols; D009153:Mutagens; C024564:2,4,6-trichlorophenol