Acidic Gases and Nitrate and Sulfate Particles in the Atmosphere in the City of Guadalajara, M,xico

作者：Saldarriaga Norena Hugo^*; Waliszewski Stefan; Murillo Tovar Mario; Hernandez Mena Leonel; de la Garza Rodriguez Iliana; Colunga Urbina Edith; Cuevas Ordaz Rosalva

来源：Bulletin of Environmental Contamination and Toxicology, 2012, 88(5): 730-734.

DOI：10.1007/s00128-012-0556-4

• Conversion ratio
• Acid gases
• PM2.5

Atmospheric concentrations of nitrous acid, nitric acid, nitrate and sulfate particles were obtained in this study from April to June 2008 in the center of the city of Guadalajara, while concentrations of ozone, sulfur dioxide, nitrogen dioxide and meteorological parameters (temperature and relative humidity), were acquired by the Secretaria del Medio Ambiente para el Desarrollo Sustentable del Estado de Jalisco (SEMADES). The results showed that nitric acid (2.7 mu g m(-3)) was 2.7 times higher than nitrous acid (1.0 mu g m(-3)). The sulfur dioxide (SO2) concentration indicated an opposite trend to sulfate (SO4 (2-)), with the average concentration of SO2 (6.9 mu g m(-3)) higher in almost the entire period of study. The sulfur conversion ratio (Fs, 24.9%) and nitrogen conversion ratio (Fn, 6.2%), were revealed to be similar to that reported in other urban areas during warm seasons. It is also noted that ozone is not the main oxidizer of nitrogen dioxide and sulfur dioxide. This determination was made by taking into account the slightly positively correlation determined for Fn (r(2) = 0.084) and Fs (r(2) = 0.092) with ozone that perhaps suggests there are other oxidizing species such as the radical OH, which are playing an important role in the processes of atmospheric oxidation in this area.

• 出版日期2012-5
• 单位河北医科大学