Characteristics of particle matter and associated polycyclic aromatic hydrocarbons in indoor and outdoor air in two cities in Shizuoka, Japan
Characteristics of particle matter and associated polycyclic aromatic hydrocarbons in indoor and outdoor air in two cities in Shizuoka, Japan
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DOI：
10.1016/j.atmosenv.2004.01.038
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发表时间：
2004-05-01
影响因子：
5
通讯作者：
Matsushita, H
中科院分区：
文献类型：
--
作者：
Ohura, T;Amagai, T;Matsushita, H
测定了日本静冈两个工业城市夏季和冬季室内和室外颗粒物（PM）和相关多环芳烃（PAHs）的浓度。细颗粒物（PM2.5）占总悬浮颗粒物的44-56%。大多数（> 80%）的多环芳烃与颗粒物中的PM2.5馏分。多环芳烃的浓度，但不是颗粒物，在冬季升高。室内和室外空气之间的强相关性（p < 0.01），发现几乎多环芳烃测量，但不是颗粒。室内外多环芳烃浓度比值表明，室内多环芳烃主要来源于室外，且冬季变化趋势尤为明显。尽管多环芳烃对PM2.5的贡献很大，但无论是室内还是室外，PM2.5的浓度与相关的多环芳烃浓度之间都没有显著的相关性。在室外，轻分子多环芳烃和苯并[a]芘（BaP）的个体相对浓度（标准化为苯并[e]芘浓度）冬季大于夏季，而其他重分子多环芳烃（BaP除外）的季节差异可忽略不计。这表明，光降解等衰变反应的贡献相对较小的重分子多环芳烃。与吸入室内多环芳烃的致癌风险进行了评估，苯并[a]芘显示出最大的贡献（51-64%）的总致癌风险。(C)2004 Elsevier Ltd.保留所有权利。
Indoor and outdoor concentrations of particle matter (PM) and associated polycyclic aromatic hydrocarbons (PAHs) in summer and winter in two industrial cities in Shizuoka, Japan, were determined. Fine particles (PM2.5) accounted for 44-56% of the total suspended PM. Most (> 80%) of the PAHs associated with the particles were in the PM2.5 fraction. The concentration of PAHs, but not particles, was elevated in winter. A strong correlation (p < 0.01) between indoor and outdoor air was found for almost PAHs measured, but not for particles. Ratios of indoor to outdoor PAH concentrations showed that the indoor PAHs were mostly from outdoor sources, and the trends were especially noticeable in winter. In spite of the high contribution of PAHs to PM2.5, no significant correlation was found between the concentration of PM2.5 and the associated PAH concentration either indoors or outdoors. Outdoors, individual relative PAH concentrations (normalized to benzo[e]pyrene concentration) were greater in winter than in summer for light molecular PAHs (similar to4 rings), as well as for benzo[a]pyrene (BaP), whereas the seasonal differences for other heavy molecular PAHs (except BaP) were negligible. This suggested that the contributions of decay reactions such as photodegradation were relatively small for the heavy molecular PAHs. Carcinogenic risks associated with the inhalation of indoor PAHs were assessed, and BaP showed the greatest contribution (51-64%) to the total carcinogenic risk. (C) 2004 Elsevier Ltd. All rights reserved.