AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
Evaluation of Carbonyl Compounds Levels in Residential and Industrial Areas of Tijuana BC, Mexico Air Basin
Jesus Guerrero-García, GUILLERMO RODRÍGUEZ-VENTURA, Ernesto Velez-Lopez, Lilia Hurtado, Javier Emmanuel Castillo-Quiñones, Penelope Quintana, Miguel Zavala, Luisa Molina, Universidad Autonoma de Baja California
Abstract Number: 549 Working Group: Urban Aerosols
Abstract Industrial areas in Tijuana B.C., México are spread along the city, in some cases are near to residential areas and most of them are localized in periphery areas, up and down to prevalent wind stream direction.
State Report of Air Emissions 2010, for Tijuana-Playas de Rosarito region, estimate VOC´s emissions are 27,629.7 tone/year, PM10 and PM2.5 are 33,802.8 and 76,873.7 tons/year respectively.
Recent studies in Calmex 2010 shown that black carbon (BC) and carbonyl compounds (CCs) are an important pollutants associated to PM2.5 and CO emission in Tijuana air basin. In particular, formaldehyde and acetaldehyde among many CCs are highly important, as they simultaneously belong to the 15 species of hazardous air pollutants in Mexico and USA. This study aimed to characterize the behavior of CCs in urban air of Tijuana, to investigate the major controlling factors on the distribution of CCs and to provide scientific information needed in mapping out, an appropriate air quality management measure for air quality network.
Measurements were carried out form November 2012 to May 2013, carbonyl samples were done at four sites; SS-LM (residential), SS-ITT (residential), SS-SPA (industrial), SS-Beach (reference). CCs analysis was carried out using SOP MLD 022 (CALEPA, 2001). Meteorological and tracers data were provided from the Monitoring Stations of the Secretary of Environmental Protection of Baja California (SPABC). In general, average concentration of formaldehyde (6.13 µg/m3) appeared to be the most abundant CCs, followed by acetaldehyde (1.89 µg/m3) and acetone (1.36 µg/m3), concentrations of CCs are 1.5 times higher in summer than winter seasons probably due to the enhanced volatilization and photochemical reactivity. Mean concentrations of formaldehyde is twice higher in the industrial site than in residential site. Total CCs concentration was three times higher in urban air related to reference site.