合肥市大气颗粒物PM10和PM2.5中PAHs的污染特征及健康风险评估

摘要

The data of polycyclic aromatic hydrocarbons (PAHs)in PM10 and PM2.5 of Hefei city from August of 2013 to January of 2014 were collected and analyzed.The results showed that PAHs exhibited the distinct seasonal variation.The highest concentration of PAHs occurred in winter,followed by autumn and summer.Significant sea-sonal variations were also observed in the PAHs contribution pattern.The 5 ~6 ring PAHs had a trend of higher rel-ative contribution in winter while 2 ~3 and 4 ring PAHs tended to have a higher contribution in summer.TEQ method was applied for health risk assessment of PAHs.The total BEQ in winter and autumn were in excess of the national and international standard limits.The pollution risk of PAHs in winter was higher than other seasons.%以夏、秋、冬三个季节合肥大气颗粒物PM10和PM2.5中PAHs为研究对象，通过采样、测定与分析，得出如下结论：合肥市大气PM10和PM2.5中PAHs的浓度季节变化特征明显，冬季＞秋季＞夏季。夏季PM10中不同环数PAHs的分布规律与该季PM2.5不同，而秋冬季则相同，分布规律都是5～6环＞4环＞2～3环。通过采用BaP毒性当量法对PAHs进行健康风险评估，发现合肥大气PM10和PM2.5中PAHs的BEQ值除了夏季低于国家标准限值外，秋、冬季节均高于国家标准限值和国际标准限值。