中国主要河流中多环芳烃生态风险的初步评价

以现有的中国主要河流中多环芳烃(PAHs)的浓度数据为基础,通过定义1个危害商,利用商值法筛选出菲、蒽、荧蒽、芘、苯并[a] 蒽、 和苯并[a]芘7种对水生生态具有潜在风险的PAHs.以河流水相中PAHs浓度数据为依据,结合毒性数据库中PAHs水相浓度对水生生物的毒性数据,用概率风险评价法分析了这7种PAHs对水生生物的生态风险.结果表明,7种筛选出的PAHs风险大小依次为：蒽>芘>苯并[a]蒽>荧蒽>苯并[a]芘>菲> .

Preliminary ecological risk assessment of polycyclic aromatic hydrocarbons in main rivers of China.

Based on the observed PAHs concentrations of different rivers in China, one hazard quotient was defined to screen the target compounds. Seven PAHs, which posed potential threat to aquatic ecosystem, including phenanthrene, anthracene, fluoranthene, pyrene, benzo[a]anthracene, chrysene and benzo[a]pyrene, were screened. Combined with the toxicity data of PAHs to aquatic organisms, the probabilistic risk approach was applied to assess the ecological risk of the seven PAHs to aquatic ecosystem. Among all the 16 investigated PAHs, ecological risk of anthracene was the highest, while the risk of chrysene was the lowest. The ecological risk of 16 individual PAHs followed the order of anthracene>pyrene>benzo[a] anthracene>fluoranthene>benzo[a]pyrene>phenanthrene>chrysene.