Discussion of Quality Criteria for Three Chlorophenols in Taihu Lake
Discussion of Quality Criteria for Three Chlorophenols in Taihu Lake
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发表时间：
2009
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通讯作者：
Wang Zi-jian
中科院分区：
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作者：
Wang Zi-jian
According to the methods and procedures of surface water quality criteria established by U.S. EPA, the aquatic species existing widely in the Taihu Lake basin were selected, and their toxicity data were collected. The aquatic quality criteria of pentachlorophenol (PCP), 2,4-dichlorophenol (2, 4-DCP)and 2,4,6-trichlorophenol (2,4,6-TCP)in the Taihu Lake basin were discussed. At the same time, species sensitivity distribution curves(SSD)based on Monte Carlo model and eco-toxicological models were employed to derive criteria maximum concentration(CMC)and criteria continuous concentration (CCC)of three chlorophenols for protection of aquatic life in the Taihu Lake basin. Results showed that the CMC of PCP, 2,4 -DCP and 2,4,6 -TCP based on the EPA methods and acute chronic ratio were 25, 908, 594μg·L -1, and the CCC were 12, 176 and 162μg·L-1, respectively. Based on the SSD, the CMC and CCC of three chlorophenols were 25, 818, 648μg·L-1, and 6, 75, 198μg·L-1, respectively. Based on the eco -toxicological models, the CCC were 4, 15 and 67μg· L-1, respectively. As we can see that CMC or CCC obtained by three methods were in the same order of magnitude, but CCC in numerical value obtained by eco-toxicological model was less than other two methods. Furthermore, the acute and chronic criteria values of three chlorophenols besides PCP were all lower than the corresponding criteria values launched by the U.S. EPA. The results of this study wish to provide useful clues for deriving national or local water quality criteria of different chemicals for protecting aquatic biota in China.
