Presentation Title

A Correlation Study Between Particulate Matter and PAH Concentrations through The Bio-monitoring of Pine Tree Leaves

Faculty Mentor

Sylvine Deprèle

Start Date

18-11-2017 9:45 AM

End Date

18-11-2017 10:00 AM

Location

9-279

Session

Physical Sciences 1

Type of Presentation

Oral Talk

Subject Area

physical_mathematical_sciences

Abstract

PAHs are polycyclic aromatic hydrocarbons composed of two or more hydrocarbon rings. PAHs result from an incomplete combustion. Exposure to PAHs are prevalent in the environment and are detrimental to our health. PAHs are inherent in particulate matter; particulate matter is a mixture of solid particles and liquid droplets in the air. Due to their deleterious properties, qualifying and quantifying PAHs is important. Therefore, we propose the bio-monitoring of PAHs through pine tree leaves from the Italian Blue Cyprus tree in two areas: The I-405 Freeway and MSMU Los Angeles campus. PAHs were extracted via a continuous soxhlet extraction and analyzed by the Gas Chromatography Mass Spectrometer (GCMS). A Selected Ion Monitoring (SIM) table searched for the 16 most common PAHs found in samples. Through a series of calculations, concentrations of PAHs were graphed and compared with the values of PMs reported by the EPA. Since PAHs fall within particulate matter, a direct correlation between the concentration of PAHs and PM values reported was expected. Samples collected from the freeway and campus area showed a direct correlation with few discrepancies that are linked to weather patterns. The strongest correlations for samples collected from I-405 Freeway are observed during the Summer/Spring seasons. Analysis of the data confirmed that the campus location displayed higher levels of PAHs than the I-405. In order to further verify these correlations, samples were run as triplicates. Thus far, this has illustrated promising direct correlations in the Spring 2017 samples of the I-405 and campus. For future directions, we will continue to monitor PMs and PAHs during the Fall season and analyze previous data acquired to finalize the quantification and qualification of PAH and PM concentrations found within the designated areas through a mathematical model.

Summary of research results to be presented

Previous data from the Fall 2016 showed few discrepancies that can be explained based on weather patterns. There were days that had higher winds near the I-405 freeway rather than on campus. The strongest correlations for samples collected from I-405 Freeway are observed during the Summer/Spring seasons. Analysis of the data confirmed that the campus location displayed higher levels of PAHs than the I-405. These discrepancies are noticeable during rainy and overcast days during February and early March. To verify these correlations, samples were run as triplicates. Thus far, this has showed consistent data in the Spring 2017 samples of the I-405 and campus. For future directions, we will continue to monitor PMs and PAHs during the Fall season and analyze previous data acquired to finalize the quantification and qualification of PAH and PM concentrations found within the designated areas through a mathematical model.

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Nov 18th, 9:45 AM Nov 18th, 10:00 AM

A Correlation Study Between Particulate Matter and PAH Concentrations through The Bio-monitoring of Pine Tree Leaves

9-279

PAHs are polycyclic aromatic hydrocarbons composed of two or more hydrocarbon rings. PAHs result from an incomplete combustion. Exposure to PAHs are prevalent in the environment and are detrimental to our health. PAHs are inherent in particulate matter; particulate matter is a mixture of solid particles and liquid droplets in the air. Due to their deleterious properties, qualifying and quantifying PAHs is important. Therefore, we propose the bio-monitoring of PAHs through pine tree leaves from the Italian Blue Cyprus tree in two areas: The I-405 Freeway and MSMU Los Angeles campus. PAHs were extracted via a continuous soxhlet extraction and analyzed by the Gas Chromatography Mass Spectrometer (GCMS). A Selected Ion Monitoring (SIM) table searched for the 16 most common PAHs found in samples. Through a series of calculations, concentrations of PAHs were graphed and compared with the values of PMs reported by the EPA. Since PAHs fall within particulate matter, a direct correlation between the concentration of PAHs and PM values reported was expected. Samples collected from the freeway and campus area showed a direct correlation with few discrepancies that are linked to weather patterns. The strongest correlations for samples collected from I-405 Freeway are observed during the Summer/Spring seasons. Analysis of the data confirmed that the campus location displayed higher levels of PAHs than the I-405. In order to further verify these correlations, samples were run as triplicates. Thus far, this has illustrated promising direct correlations in the Spring 2017 samples of the I-405 and campus. For future directions, we will continue to monitor PMs and PAHs during the Fall season and analyze previous data acquired to finalize the quantification and qualification of PAH and PM concentrations found within the designated areas through a mathematical model.