上海工业区玻璃表面多环芳烃分布特征与溯源

利用GC-MS对上海工业区玻璃表面16种优控多环芳烃(PAHs)进行了定量分析.结果表明,宝山工业区、吴泾化工区和金山化工区玻璃表面PAHs平均含量分别为10.66,16.48,31.94mg/m2,工业区附近对照点PAHs平均含量分别为2.7,8.86,4.18mg/m2.各采样点玻璃表面不同环数PAHs分布特征相似,以3环和4环PAHs为主,平均含量分别占∑16PAHs的25%和47%;其次为5环和6环PAHs,分别占∑16PAHs的14%和9%,最低为2环PAHs,仅占5%.单体PAH以Phe、Fluo、Py和Chry为主.源解析表明,玻璃表面PAHs主要来源于煤和焦炭燃烧,部分来源于石油燃烧.质量标准化毒性当量浓度范围在0.07~3.23mg/g之间,对毒性当量贡献最大的单体PAH分别是BaP,BbF,BkF,DahA.

Distribution and sources of polycyclic aromatic hydrocarbons (PAHs) on glass surface of industrial zone in Shanghai

Sixteen priority control polycyclic aromatic hydrocarbons (PAHs) on glass surface from major industrial areas in Shanghai were quantitatively analyzed by GC-MS. High levels of PAHs were observed. Average concentrations of PAHs from the Baoshan Industrial Zone, Wu Jing Chemical Industry Zone and Jinshan Chemical Industry Park were 10.66, 16.48, 31.94mg/m2, while those of control sites were 2.70, 8.86, 4.18mg/m2, respectively. The PAHs compositions were dominated by 3 and 4 rings PAHs, which accounted for 25% and 47% of Σ16PAHs, while 5 and 6 rings PAHs accounted for 14% and 9% of Σ16PAHs, respectively, and 2 rings PAHs only accounted for 5%. The most abundant PAHs were phenanthrene, fluorene, pyrene and chrysene. The source apportionment showed that the PAHs mainly came from the combustion of coal and coke, and partly derived from petroleum sources. The concentration of BaPeq (benzo a] pyrene equivalent) varied from 0.07 to 3.23 mg/g, and the major carcinogenic contributor of 16PAHs were benzo (a) pyrene, benzo (b) fluoranthene, benzo (k) fluoranthene, bibenzo (a,h) anthracene.