Presentation Title

Energy Dispersive X-ray Spectroscopy Mapping of Particles As A Component of Lichen Biomonitoring in Seattle, Washington

Presentation Type

Poster

Abstract

Lichen are an increasingly popular medium for air quality monitoring due to their sensitivity to SOx and NOx, as well as their bioaccumulation of airborne material. This study incorporates characterization of particulate matter (PM) on the surface of lichen Ramalina farinacia to map exposure to air pollution in three industrial clusters in Seattle, Washington. The PM was characterized using scanning electron microscopy with energy-dispersive X-ray spectroscopy mapping to determine PM size and composition. We also measured bioaccumulation of metals and the biomarkers glutathione, malondialdehyde, and usnic acid in the lichen. Principal components analysis has identified which geographic locations and particle types correlate the strongest with increased metal accumulation and physiological response in the lichen.

Start Date

10-5-2018 12:00 PM

End Date

10-5-2018 2:00 PM

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May 10th, 12:00 PM May 10th, 2:00 PM

Energy Dispersive X-ray Spectroscopy Mapping of Particles As A Component of Lichen Biomonitoring in Seattle, Washington

Lichen are an increasingly popular medium for air quality monitoring due to their sensitivity to SOx and NOx, as well as their bioaccumulation of airborne material. This study incorporates characterization of particulate matter (PM) on the surface of lichen Ramalina farinacia to map exposure to air pollution in three industrial clusters in Seattle, Washington. The PM was characterized using scanning electron microscopy with energy-dispersive X-ray spectroscopy mapping to determine PM size and composition. We also measured bioaccumulation of metals and the biomarkers glutathione, malondialdehyde, and usnic acid in the lichen. Principal components analysis has identified which geographic locations and particle types correlate the strongest with increased metal accumulation and physiological response in the lichen.