沈阳卫工河水中多环芳烃的分布、来源及生态风险初步评价

卫工河水中6月(夏季)16种多环芳烃的含量为0.244～2.038μg·L-1,平均为0.768μg·L-1;9月(秋季)水中总多环芳烃(TPAHs)含量为0.503～0.989μg·L-1,平均0.761μg·L-1;11月(冬季)多环芳烃的含量为0.229～0.427μg·L-1,平均含量为0.346μg·L-1。个别地点苯并(a)芘含量明显高于国家地表水环境质量标准(GB3838-2002);对卫工河水中多环芳烃污染来源分析发现,多环芳烃的主要来源燃烧来源;通过商值法对卫工河的初步风险评价表明,卫工河水中苯并(a)芘存在较大的生态风险,应引起有关部门的进一步关注。

Distribution,Sources and Ecological Risk Assessment of Polycyclic Aromatic Hydrocarbons(PAH)in Water of Weigong River,Shenyang

The TPAHs contents of 16 species in water of the Weigong River are within the range of 0.244~2.038 μg·L-1 with an average of 0.768 μg·L-1 in summer, within the range of 0.503~0.989 μg·L-1 with an average of 0.761 μg·L-1 in autumn, and within the range 0.229~0.427 μg·L-1 with an average of 0.346 μg·L-1 in winter, respectively. The Benzoa] pyren contents at the same sites are much higher than the reference values provided by the environmental quality standards for surface water (GB3838-2002). It is suggested that PAHs in water of the Weigong River mostly came from combustion sources. The primary ecological risk of PAHs was assessed using the quotient method and the results showed that the Benzoa] pyren contributed a lot to the risk and more attention should be payed to it.