Sina Hasheminassab


Sina Hasheminassab is an Air Quality Specialist in the Science and Technology Advancement office at the South Coast Air Quality Management District. Sina holds a Ph.D. degree in Environmental Engineering from the University of Southern California.

Research Focus:
Sina has been involved in several research projects that aimed to characterize the sources, composition, variability and toxicological properties of airborne particulate matter (PM) across California, with a particular focus on the urban setting of the Los Angeles air basin. These projects were supported by grants from the U.S. Environmental Protection Agency, the South Coast Air Quality Management District, the National Cancer Institute, and the California Air Resources Board. 

His Ph.D. dissertation is entitled: “Physico-chemical properties and source apportionment of size-fractionated airborne particulate matter in urban areas with implications for public health”. The overarching objective of Sina’s research is to identify, characterize, and quantify sources of size-segregated PM in indoor and outdoor environments and to evaluate how population exposure to these pollutants and the toxicity of PM sources vary with respect to location, season, and particle size. Another important part of his Ph.D. thesis was to evaluate the efficacy of mobile source technologies and implementation of more stringent mobile source regulations on ambient air quality improvement, through source apportionment analysis of ambient PM.

In collaboration with environmental epidemiologists, Sina seeks to identify the major contributors to the adverse health effects linked to PM and to understand how toxic mechanisms vary with the source, chemical composition, and physical characteristics of PM.  Findings of his research will help federal and state regulatory agencies understand the linkage among sources, composition, and toxicity of size-fractionated indoor and outdoor PM. Information on PM emissions from a variety of sources will provide a strong scientific basis to develop cost-effective strategies to protect the public health from toxic sources of PM. The results will also help determine if there is a scientific foundation for controlling PM from only a subset of PM sources.

Sina grew up in Tehran, Iran and received his bachelor degree in Chemical Engineering from the Sharif University of Technology. In 2011, he joined USC and pursued his doctoral studies under the supervision of Dr. Constantinos Sioutas and graduated in 2016. His hobbies include photography and exploring nature.


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