摘要:
采用多溴联苯醚(PBDEs)对我国广泛分布生物物种的生态毒性数据，根据欧盟现有化学物质风险评价技术指导文件，对不同环境介质中PBDEs预测无效应浓度(PNEC)进行了推导。结果表明：我国淡水环境PBDEs (四溴、五溴、八溴)的PNEC水分别为50 μg·L-1、0.53 μg·L-1、0.017 μg·L-1。沉积物环境PBDEs (四溴、五溴、八溴和十溴)的PNEC沉积物分别为823.35 mg·kg-1 wt、1.55 mg·kg-1 dw、12.72 mg·kg-1 dw、>38.41 mg·kg-1 dw。土壤环境PBDEs (四溴、五溴、八溴和十溴)的PNEC土壤分别为668.3 mg·kg-1 wt、0.38 mg·kg-1 dw、147 mg·kg-1 dw、>98 mg·kg-1 dw。次生毒性PBDEs (五溴、八溴和十溴)的PNEC经口分别为0.3~0.7 mg·kg-1、0.56 mg·kg-1、2 500 mg·kg-1。该数值期为我国PBDEs的环境风险评价提供科学基础。
Abstract:
According to the EU technical guidance document on risk assesssment, the predicted no-effect concentration (PNEC) values of four kinds of polybrominated diphenyl ethers (PBDEs) in the environmental mediums were derived with the ecotoxicity data of our widely distributed species in China. The results showed that the PNECwater of PBDEs (tetrabromobiphenyl ether, pentabromodiphenyl ether, octabromobiphenyl ether) in the freshwater were 50 μg·L-1, 0.53 μg·L-1, 0.017 μg·L-1, respetively. The PNECsediment of PBDEs (tetrabromobiphenyl ether, pentabromodiphenyl ether, octabromobiphenyl ether, decabromobiphenyl ether) in the sediment were 823.35 mg·kg-1 wt, 1.55 mg·kg-1 dw, 12.72 mg·kg-1 dw, >38.41 mg·kg-1 dw, respetively. The PNECsoil of PBDEs (tetrabromobiphenyl ether, pentabromodiphenyl ether, octabromobiphenyl ether, decabromobiphenyl ether) in soil were 668.3 mg·kg-1 wt, 0.38 mg·kg-1 dw, 147 mg·kg-1 dw, >98 mg·kg-1 dw, respetively. The PNECoral of PBDEs (pentabromodiphenyl ether, octabromobiphenyl ether, decabromobiphenyl ether) of secondary poison were 0.3~0.7 mg·kg-1, 0.56 mg·kg-1, 2 500 mg·kg-1, respetively. These values could provide the scientific basis for the environmental risk assessment of PBDEs in China.
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