科研之友
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摘要
Organic film on the glass surface were gathered from seven universities and a university town in the downtown and suburbs of Shanghai in different seasons to determine the enrichment level and sources of PAHs on the glass surface. Gas chromatography-mass spectrometry (GC-MS) was used to measure the mass concentrations of 16 different types of PAHs that are under the priority control of the United States Environmental Protection Agency. The seasonal distribution of mass concentration, component features, and pollution sources of PAHs on the glass surface was also examined. According to the findings, the annual average area normalized mass concentration of PAHs on the glass surfaces of universities in the downtown (541.5ng/m2) was significantly higher than that in the suburbs (290.0ng/m2), with TJU(Tongji University) having the highest annual average mass concentration (998.1ng/m2) and SJUT (Songjiang University Town) having the lowest annual average mass concentration (226.6ng/m2). The seasonal variation range of PAHs mass concentration on the glass surface of SHU (Shanghai University) was the smallest, implying that the pollution source was fairly unchanged; low-ring PAHs were more easily enhanced on the glass surface in summer, autumn, and winter; Phe was the pollutant with the highest proportion in each season; a wide range of traceability indicators demonstrate that the PAHs on the glass surface of Shanghai universities were mainly local sources and largely from oil combustion and raise dust, particularly from the automotive exhaust; the primary carcinogens of PAHs on glass surfaces were BaP, DahA, and B[b+k]F.
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