marcelo guzman

Pillar and Guzman reveal how aromatic pollutants emitted during combustion and wood burning contribute to the formation of brown clouds

Aerosol particles suspended in the air of urban environments typically reduce visibility, interact with sunlight by scattering and absorbing radiation, and lower air quality. In addition, these tiny particles can also contribute large pollution plumes, called “brown clouds”, which have been observed to originate over South Asia in recent years and undergo long distance transport by the wind to reach other continents. The particles in brown clouds are composed by an unhealthy and variable mix including ozone and organic molecules found in smoke.

Undergraduate Student Honored by the Division of Environmental Chemistry of the American Chemical Society

In recognition of his contributions to the field of environmental chemistry Kayvon Ghayoumi is honored with the Division of Environmental Chemistry 2017 Undergraduate award from the American Chemical Society. Ghayoumi earned a B.A. in Chemistry at the University of Kentucky this Spring. His interest in Environmental Chemistry started while taking CHE 565 taught by Dr. Marcelo Guzman, who later became his research supervisor.

Eugene and Guzman reveal how sunlight can spark chemical reactions in clouds, fog, and mist

Atmospheric aerosols such as smoke, fog, and mist are made of fine solid or liquid particles suspended in air. In the lower atmosphere aerosols play a major role in controlling air quality, as well as in scattering and absorbing sunlight. This interaction of aerosols with light varies widely and depends on their complex chemical composition that rapidly changes under the governing highly reactive conditions found in the atmosphere. Importantly, the mysterious formation of carbon-containing atmospheric particles has intrigued atmospheric scientists during the last decade.

Alexis Eugene wins NASA Graduate Fellowship

LEXINGTON, Ky. (July 15, 2016) Alexis Eugene, a University of Kentucky doctoral student in the Department of Chemistry, has been awarded the NASA Earth and Space Science Fellowship.

Guzman’s Group article becomes the most read paper of the Journal of Physical Chemistry A

The Journal of Physical Chemistry A recognized an article by University of Kentucky Chemistry Professor Marcelo Guzman as the most read article for the last 12 months.

Pillar receives 2016 UK Woman's Club Fellowship

This fellowship recognizes both current achievements as a doctoral student as well as future potential. 

Pillar, Zhou, and Guzman publish "Heterogeneous Oxidation of Catechol" in J. Phys. Chem. A.

The results of this study show that carboxylic acids and polyhydroxylated biphenyls and terphenyls products can be generated from organic species emitted during combustion processes. The implication of this finding is that heterogeneous reactions provide a channel for the generation of secondary oxidants during atmospheric processes. J. Phys. Chem. A, 2015, 119 (41), 10349–10359.

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