AAAR 34th Annual Conference
October 12 - October 16, 2015
Hyatt Regency
Minneapolis, Minnesota, USA
Abstract View
Evaluation and Characterization of Carbonyl Compounds in Ambient Air, Refuge Area, Tijuana, Baja California, Mexico
DEISY SUGEY TOLEDO ARANGURE, Guillermo Rodriguez, Ernesto Velez-Lopez, Alejandro Gomez, Mariela Ruiz, Universidad Autonoma de Baja California,Tijuana,Mexico
Abstract Number: 575 Working Group: Carbonaceous Aerosols in the Atmosphere
Abstract Carbonyl compounds in the atmosphere are emitted from natural, anthropogenic or photooxidation products are volatile organic compounds (VOCs) (P. Carlier, 1986) sources. The formation of these pollutants is through photochemical oxidation of hydrocarbons such as methane, and other precursors with OH radicals. (P. Armando Baez, 2009) (ATSDR, 1999).
It has been found that formaldehyde is the most abundant in polluted atmospheres and its health effects are manifested in irritation of eyes and respiratory tract, in addition to headache, (A. Campos, 1995). According to the International Agency for Research on Cancer it is it classified as carcinogenic to humans (IARC, 2006), however, have not been established permissible limits air concentrations for this group of pollutants in the country.
In Tijuana, Baja California, there is monitoring program for air quality criteria pollutants (SPA, 2012-2020), with five monitoring stations for air basin -Rosarito Tijuana, reports of PM10 concentrations are published, PM2.5, ozone (O3), nitrogen oxides (NOx), sulfur oxide (SOx).
The method used is US EPA.- TO -11 Ambient air is sucked through Cartridges Sep- Pak silica chromatographic grade. These are coated with 2,4 dinitrophenylhydrazine (DNPH) acidified as derivatizing agent. (The sampling rate was 0.7L / m for a period of 24 hours. (SOP MLD 022, 2001)
In general, average concentration of formaldehyde (8.4 µg/m3) appeared to be the most abundant CCs, followed by butaraldehyde (5.85 µg/m3) and crotonaldehyde (4.94 µg/m3). These results are preliminary and correspond to the fall-winter season, even lack perform sampling Spring - Summer and to compare both periods. It is expected to increase by a high photochemical activity in summer.