Barbosa-Sánchez Ana Larissa, Márquez-Herrera Ciro, Sosa-Echeverria Rodolfo, Díaz-Godoy Raúl Venancio, Gutiérrez-Castillo María Eugenia, Escamilla-Núñez Consuelo, Rule Ana M, Sierra-Vargas Martha Patricia, Aztatzi-Aguilar Octavio Gamaliel
Instituto Nacional de Salud Pública, CDMX, Salud Pública, México.
Facultad de Química, Universidad Nacional Autónoma de México, CMDX, Salud Pública, México.
Bull Environ Contam Toxicol. 2022 Dec;109(6):1175-1182. doi: 10.1007/s00128-022-03610-7. Epub 2022 Sep 7.
This study provides evidence of the seasonal and spatial variation of metal(lloid)s in particulate matter minor to 2.5 microns (PM) in the Toluca Valley Metropolitan Area (TVMA), the fifth largest urban center in Mexico. Four sites were sampled between 2013 and 2014, which included urban and industrial areas, in the dry-cold (November-February) and dry-hot (March-May) seasons; PM was collected using high- and medium-volume samplers. Metal(lloid) concentrations in PM were analyzed using inductively coupled plasma‒mass spectrometry (ICP‒MS). The highest 24-hour PM concentration in the northern area was observed, and the PM concentrations were independent of the season. Five metal(lloid)s with a recovery percentage above 80% were considered to be reported (Co, Cr, Cu, Mn, and Sb). The maximum concentrations of metal(lloid)s were observed during the dry-cold season, and concentrations were up to one hundred or thousand fold with respect to the dry-hot season. The 24-hour PM and metal(lloid) concentrations exceeded national and international guidelines to protect population health.
本研究提供了墨西哥第五大城市中心托卢卡谷都市区（TVMA）小于2.5微米颗粒物（PM）中金属（类金属）的季节和空间变化证据。2013年至2014年期间在四个地点进行了采样，地点包括城市和工业区，采样季节为干冷季（11月至2月）和干热季（3月至5月）；使用高容量和中容量采样器收集PM。采用电感耦合等离子体质谱法（ICP-MS）分析PM中的金属（类金属）浓度。在北部地区观测到最高的24小时PM浓度，且PM浓度与季节无关。回收率高于80%的五种金属（类金属）（钴、铬、铜、锰和锑）被视为有报告数据。金属（类金属）的最高浓度出现在干冷季，相对于干热季，浓度高达百倍或千倍。24小时PM和金属（类金属）浓度超过了保护人群健康的国家和国际准则。
