The atmosphere is a dynamic system involving a large number of chemical species and their chemical reactions. Our research goal is to better understand the chemical composition, sources and transformations and impacts on health.

Sources of particulate matter in urban atmospheres

Particulate matter is an important urban air pollutant. Our group conducts field measurements of organic compounds in urban areas to identify their sources and chemical properties. The chemical information allows us to study the physical and biological properties of particulate matter emitted from vehicular traffic, food cooking and wood burning.

 

 

Mechanisms of atmospheric reactions

We study reaction mechanisms through controlled laboratory experiments, using different chemical reactors to simulate atmospheric oxidation. We investigate topics including mechanisms of mixing between organic compounds, and reactions between organic compounds and sulfur dioxide to form sulfuric acid in the atmosphere.

 

Persistence of wildfire-derived pollutants

Our group studies whether major wildfires, such as the 2016 Fort McMurray wildfires, would leave behind toxic pollutants in burnt areas that can affect long term human health. We measure heavy metals and organic carcinogens in indoor house dust in fire-affected areas to determine the contribution from wildfires. Our work informs remediation efforts after environmental disasters. For more information, please visit our FACET website.

 

Health impacts of organic aerosol

Using chemical information, we study the health impacts of particulate matter. We collaborate with the Faculty of Medicine to study the sub-chronic effects of pollutants on pulmonary health. We study the mechanisms by which particulate matter exposure leads to exacerbation of lung diseases (such as cystic fibrosis) and respiratory infections.