10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
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Determination of the Emission Sources of Particulate Matter in Queretaro (Mexico)
SARA ERIKA OLIVARES, Dara Salcedo, Harry Alvarez-Ospina, Carina Aguillon-Vazques, National University of Mexico
Abstract Number: 1059 Working Group: Air Quality in Megacities: from Sources to Control
Abstract Queretaro is located in the center of Mexico, 270 km north of the City of Mexico Metropolitan Area and is one of the cities with highest economic development in recent years, coupled with rapid population growth (30% in the last 15 years) and an expansion of industrial areas within and near the city. As a result, there has been an increase in the amount of pollutants emitted into the atmosphere, including particulate matter (PM). Given that PM is one of the pollutants with greatest impact on human health, it is important to identify its sources in order to implement regulations to control its ambient concentration.
PM10 and PM2.5 were collected at three sites in Queretaro during 2014 and 2017. The concentration of trace elements in the samples was determined using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The results were analyzed using the EPA´s Positive Matriz Factorization (PMF) model in order to identify the main PM sources in the city of Queretaro.
Preliminary results show that PM10 has a cortical origin, while the PM2.5 is mainly of anthropic origin, as expected. A more detailed analysis will be presented showing the characteristics, relative contributions, and time series of the source identified. Comparison of the data at different periods and sites will be used to describe the temporal and spatial variability of the PM and trace elements concentrations.