Morton-Bermea Ofelia, Garza-Galindo Rodrigo, Hernández-Álvarez Elizabeth, Ordoñez-Godínez Sara L, Amador-Muñoz Omar, Beramendi-Orosco Laura, Miranda Javier, Rosas-Pérez Irma
Instituto de Geofísica, Universidad Nacional Autónoma de México, Mexico, Cd. de México, Mexico.
Posgrado en Ciencias de la Tierra, Universidad Nacional Autónoma de México, Cd. de México, Mexico.
Bull Environ Contam Toxicol. 2018 Apr;100(4):588-592. doi: 10.1007/s00128-018-2288-6. Epub 2018 Feb 16.
In this study, atmospheric mercury concentration in airborne particulate matter with an aerodynamic diameter ≤ 2.5 µm (PM) was analyzed by ICP-MS. Samples were collected in the Mexico City Metropolitan Area (MCMA), during 2013, in five locations, Northwest, Northeast (NE), Central, Southwest and Southeast, along three seasons: dry warm, rainy, and dry cold (DC). It can be observed that NE shows the highest mercury concentration (p < 0.05), where pollution events were identified. The seasonal distribution shows that samples collected during DC present the highest concentration (p < 0.05). These results are in agreement with the distribution of important mercury industrial sources located in the northern urban area as well with the temperature and wind conditions during 2013. The comparison of data obtained in this work with those of similar previous studies clearly indicates a decrease, between 2006 and 2013, of mercury content in PM collected in MCMA.
在本研究中，采用电感耦合等离子体质谱法（ICP-MS）分析了空气动力学直径≤2.5微米的大气颗粒物（PM）中的汞浓度。2013年期间，在墨西哥城大都市区（MCMA）的五个地点，即西北、东北（NE）、中部、西南和东南部，沿着三个季节：干燥温暖季、雨季和干冷季（DC）采集了样本。可以观察到，NE的汞浓度最高（p<0.05），在该区域识别出了污染事件。季节分布表明，在DC期间采集的样本浓度最高（p<0.05）。这些结果与位于北部市区的重要汞工业源分布以及2013年的温度和风力条件相符。将本研究获得的数据与之前类似研究的数据进行比较，结果清楚地表明，2006年至2013年期间，MCMA采集的PM中的汞含量有所下降。
