title: Characterization and Modeling of Polycyclic Aromatic Compound Uptake into Spruce Tree Wood.
abstract: This study highlights the potential of uptake into tree inner wood via direct-transfer through bark, as one contributing mechanism to describe atmospheric uptake of polycyclic aromatic compounds (PACs) into trees. The uptake of PACs into blue spruce tree wood was measured, with wood-air partition coefficients (KWOOD_AIR) determined for five PACs. A correlation between the octanol-air partition coefficient (KOA) and KWOOD_AIRfor these five chemicals was determined and the KWOOD_AIRfor 43 PACs were derived. A ratio of solubility (activity) difference between tree wood and octanol was also determined for these chemicals from this correlation. Finally, the derived KWOOD_AIRvalues were further applied to calculate an air volume sampled by the inner wood layer (cambium) of a tree during a one year growth (sampling) period. PACs with a log KWOOD_AIR> 6 remained in the linear sampling phase over one year of sampling. The results further highlight the important sink that forests provide for atmospheric organic chemicals which should be considered for emissions monitoring and impact assessments from destructive events such as forest fires or clear felling of forests.
authors.affiliation: Air Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin St. Toronto, Ontario M3H 5T4, Canada.
authors.forename: Cassandra
authors.identifier: http://orcid.org/0000-0002-2543-9023
authors.initials: C
authors.lastname: Rauert
authors.affiliation: Air Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin St. Toronto, Ontario M3H 5T4, Canada.|University of Toronto at Scarborough , 1265 Military Trail Toronto, Ontario M1C 1A4, Canada.
authors.forename: Ajitha
authors.initials: A
authors.lastname: Kananathalingam
authors.affiliation: Air Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin St. Toronto, Ontario M3H 5T4, Canada.
authors.forename: Tom
authors.initials: T
authors.lastname: Harner
mesh_terms: D000393:Air Pollutants; D028222:Picea; D011083:Polycyclic Compounds; D014197:Trees / Q000737:chemistry; D014934:Wood / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D011083:Polycyclic Compounds