Zhang Li-fei, Yang Wen-long, Dong Liang, Shi Shuang-xin, Zhou Li, Zhang Xiu-lan, Li Ling-ling, Niu Shan, Huang Ye-ru
State Environmental Protection Key Laboratory of Dioxin Pollution Control, National Research Center for Environmental Analysis and Measurement, Beijing 100029, China.
Huan Jing Ke Xue. 2013 Sep;34(9):3339-46.
Atmosphere is regarded to be an important media in the environmental pollution research area. Passive air sampling was one of the effective complementary sampling techniques for the active high volume air sampler in recent decades. A regional scale investigation on the atmospheric polycyclic aromatic hydrocarbons (PAHs) was conducted in the Yangtze River Delta (YRD). Polyurethane foam based passive air samplers were used to collect the atmospheric PAHs from 31 sampling sites in this area. PAHs concentrations ranged from 10.1 ng x m(-1) to 367 ng x m(-3) in this study. The annual average concentration of benzo [a] pyrene (BaP) reached 2.25 ng x m(-3), which was two times higher exceeding the national standard, GB 3095-2012. The atmospheric PAHs during four seasons decreased in the following order: autumn > winter > spring > summer. Larger BaP excessive areas were found in autumn and winter than other seasons. Moreover, an obvious emission of BaP was confirmed during the winter time. Traffic related petroleum combustion, coal and biomass burning, and coke oven were identified as potential sources of atmospheric PAHs, contributing 38.1%, 42.4%, and 19.5%, respectively.
大气被视为环境污染研究领域的一种重要介质。被动空气采样是近几十年来主动大容量空气采样器的有效补充采样技术之一。在长江三角洲地区开展了一次大气多环芳烃（PAHs）的区域尺度调查。基于聚氨酯泡沫的被动空气采样器用于采集该地区31个采样点的大气PAHs。本研究中PAHs浓度范围为10.1 ng x m(-1)至367 ng x m(-3)。苯并[a]芘（BaP）的年平均浓度达到2.25 ng x m(-3)，超出国家标准GB 3095-2012两倍。四季大气PAHs浓度按以下顺序降低：秋季＞冬季＞春季＞夏季。秋季和冬季发现的BaP超标区域比其他季节更大。此外，冬季确认存在明显的BaP排放。与交通相关的石油燃烧、煤炭和生物质燃烧以及焦炉被确定为大气PAHs的潜在来源，分别占38.1%、42.4%和19.5%。
