Exposures to particulate air pollution and nitro-polycyclic aromatic hydrocarbons among taxi drivers in Shenyang, China.
Exposures to particulate air pollution and nitro-polycyclic aromatic hydrocarbons among taxi drivers in Shenyang, China.
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DOI：
10.1021/es802392u
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发表时间：
2010-01-01
影响因子：
11.4
通讯作者：
Simpson CD
中科院分区：
文献类型：
--
作者：
Miller-Schulze JP;Paulsen M;Toriba A;Tang N;Hayakawa K;Tamura K;Dong L;Zhang X;Simpson CD
2007年8月，对中国沈阳市一组出租车司机暴露于10-2.5 μm（PM10-2.5）和2.5 μm以下（PM2.5）的颗粒物（PM）进行了测量。在司机轮班期间在出租车内外收集PM样品，并在司机下班时在家中收集PM样品。在沈阳的一个固定地点也收集了环境PM样品。元素碳（EC）和有机碳（OC），也测量在的士内以及在固定站点的石英过滤器上收集的PM。采用2D-HPLC-MS/MS方法测定了PM样品提取物中1-硝基芘（1 NP）、2-硝基芘（2NP）和2-硝基荧蒽（2NFI）3种硝基多环芳烃（NPAH）的浓度。2NP和2NF 1的浓度并没有随着采样位置而显著变化，但是与远离交通的采样位置相比，在出租车内部和外部收集的样品中的1 NP浓度要高得多。利用NPAHs的浓度比值对沈阳市大气环境质量进行了评价。相对高的2NF 1/1 NP比率（~8-50）表明次级NPAH形成对环境NPAH水平的重要贡献，特别是对于非滑行样品。2NF 1/2NP的比率（2.5-4.3）表明2NF 1主要通过羟基引发的反应形成。
Exposures to particulate matter (PM) of both 10–2.5 μm (PM10-2.5) and below 2.5 μm (PM2.5) were measured for a cohort of taxi drivers in Shenyang, China, during August of 2007. PM samples were collected inside and outside the taxi during the drivers’ workshifts, and also inside the drivers’ homes when they were off-shift. Ambient PM samples were also collected at a stationary location in Shenyang. Elemental carbon (EC) and organic carbon (OC) were also measured in PM collected on quartz filters inside the taxis as well as at the stationary site. Concentrations of three nitro-polycyclic aromatic hydrocarbons (NPAHs): 1-nitropyrene (1NP), 2-nitropyrene (2NP), and 2-nitrofluoranthene (2NFl) were determined in extracts of the PM samples by using a 2D-HPLC-MS/MS method. The 2NP and 2NFl concentrations did not change substantially with sampling location, but the 1NP concentrations were much higher in samples collected inside and outside the taxis as compared with sampling locations that were more removed from traffic. Concentration ratios of specific NPAHs were used to assess the atmospheric conditions in Shenyang during the sampling period. The relatively high ratios of 2NFl/1NP (~8–50) indicate an important contribution from secondary NPAH formation to ambient NPAH levels, especially for the non-taxi samples. The ratios of 2NFl/2NP (2.5–4.3) indicate that 2NFl is primarily formed via the hydroxyl-initiated reaction.
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影响因子：
5.2
作者：
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通讯作者：
Solomon, PA
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