上海市大气颗粒物中多环芳烃的季节变化特征和致癌风险评价  

SEASONAL VARIATION AND CARCINOGENIC ASSESSMENT OF PARTICULATE POLYCYCLIC AROMATIC HYDROCARBONS IN SHANGHAI,CHINA

作　　者：熊胜春[1] 陈颖军[2] 支国瑞[3] 盛国英[1,3] 傅家谟[1,3] 

机构地区：[1]上海大学环境污染与健康研究所,上海200072 [2]中国科学院烟台海岸带可持续发展研究所,烟台264003 [3]中国科学院广州地球化学研究所有机地球化学国家重点实验室,广州510640

出　　处：《环境化学》2009年第1期117-120,共4页Environmental Chemistry

基　　金：国家自然科学基金青年基金项目(40605033);上海市重点学科(T0105)资助项目.

摘　　要：对上海市城区和郊区采集的64个总悬浮颗粒物(TSP)样品进行GC/MS分析,结果表明:全年PAHs浓度范围为2.25-221.6ng·m^(-3),并呈现明显的秋、冬季节高而夏季低的变化特征,且PAHs年平均值郊区稍微高于城区.多环芳烃中苯并(b+k)荧蒽、茚并(1,2,3-cd)芘、晕苯等化合物相对含量较高,四环以上的组分全年平均含量在90%以上.采用苯并(a)芘和苯并(a)芘等效质量浓度(BaPE)对上海市大气颗粒物中的PAHs进行致癌风险评价,BaP年均值在城区和郊区分别为2.57ng·m^(-3)和2.86ng·m^(-3),秋季BaP年均值超过了居民区标准限值(5.0ng·m^(-3)).BaPE在城区和郊区的年均浓度分别为5.82ng·m^(-3)和7.24ng·m^(-3),秋季污染最为严重.Total suspended particle （TSP） samples were collected at two sites （urban versus suburban area） in Shanghai between October 2005 and August 2006. 17 PAHs compounds including 15 EPA priority PAHs were extracted by ultrasonic extraction method and were quantified using GC/MS. The results indicated that the total amount of PAHs at two sampling sites ranged from 2. 25 to 221.6ng·m^-3. Clear seasonal variation of PAHs concentration was observed at two sites with higher level in fall and winter but lower in summer and the value in suburban area was greater than that in urban area. PAHs profile was predominated by benzo（ b ＋ k）fluoranthene, indeno（ 1,2,3-cd） pyrene and eoronene and the average contribution of high rings components （ 〉 4- ring） was more than 90% at both sites. Adopting benzo（a） pyrene（BaP） and benzo（a） pyrene-equivalent carcinogenic concentration （BaPE） to evaluate carcinogenic power of atmospheric aerosol PAHs, annual average concentration of BaP was 2.57ng·m^-3 at Zhabei and 2. 86ng·m^-3 at Jiading, respectively; the BaP concentration at two site was in excess of the regional standard （5.0ng·m^-3） . The annual BaPE was 5.82ng·m^-3 and 7. 24ng·m^-3 at urban and suburban area, respectively, and the highest level occurred in fall season.

关 键 词：多环芳烃 颗粒物 等效浓度 上海市. 

分 类 号：X513[环境科学与工程—环境工程] X921