Oliveira Rafael Lopes, Loyola Josiane, Minho Alan Silva, Quiterio Simone Lorena, de Almeida Azevedo Débora, Arbilla Graciela
Instituto de Química, Centro de Tecnologia, Universidade Federal do Rio de Janeiro, Bloco A, Sala 408, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ, 21949-900, Brazil.
Bull Environ Contam Toxicol. 2014 Dec;93(6):781-6. doi: 10.1007/s00128-014-1409-0. Epub 2014 Oct 26.
The aim of this study was to characterize the PM2.5-bound polycyclic aromatic hydrocarbon (PAH) concentrations and their diagnostic ratios in an area impacted by light-duty vehicles fueled by neat ethanol and ethanol-blended gasoline. Samples were collected using a high-volume sampler, extracted, and analyzed for all 16 EPA-priority PAHs using gas chromatography/mass spectrometry (GC/MS) following the EPA 3550B Method. The most abundant PAHs were benzo[g,h,i]perylene, benzo[b]fluoranthene, benzo[a]pyrene and indeno[1,2,3-c,d]pyrene. The total mean concentration was 3.80 ± 2.88 ng m(-3), and the contribution of carcinogenic species was 58 ± 16 % of the total PAHs. The cumulative health hazard from the PAH mixture was determined, and the carcinogenic equivalents and mutagenic equivalents were 0.80 ± 0.82 and 1.17 ± 1.04 ng m(-3), respectively. Diagnostic ratios and normalized ratios were calculated for the individual samples.
本研究的目的是确定在受纯乙醇和乙醇混合汽油驱动的轻型车辆影响的地区，细颗粒物（PM2.5）吸附的多环芳烃（PAH）浓度及其诊断比值。使用大容量采样器采集样本，按照美国环境保护局（EPA）3550B方法进行萃取，并采用气相色谱/质谱联用仪（GC/MS）对全部16种EPA优先控制的多环芳烃进行分析。含量最高的多环芳烃是苯并[g,h,i]苝、苯并[b]荧蒽、苯并[a]芘和茚并[1,2,3-c,d]芘。总平均浓度为3.80±2.88纳克/立方米，致癌物质的含量占多环芳烃总量的58±16%。测定了多环芳烃混合物的累积健康危害，致癌当量和致突变当量分别为0.80±0.82和1.17±1.04纳克/立方米。计算了各个样本的诊断比值和归一化比值。
