Abstract
Gas–particle partitioning relationships were developed for partitioning of polychlorinated naphthalenes (PCNs) and non- and mono- ortho PCBs in arctic air by regressing observed gas–particle partition coefficients, K P, at Alert and Dunai in the high Arctic with temperature-adjusted experimental vapor pressures ( p L°) and octanol–air partition coefficients ( K OA). Slopes were near −0.5 and 0.5 for log p L° and log K OA, respectively, at both sites, indicating that aerosol characteristics and partitioning processes were similar at the two sites. The K OA absorption model provided an adequate estimate of the percentage of PCNs and non-/mono- ortho PCBs associated with particulate matter, based on fraction of organic matter ( f OM) ranging from 0.074 to 0.12, compared to the Junge-Pankow adsorption model, which slightly over-estimated the distribution on particles. There were no indications that partitioning to soot carbon influences the observed gas–particle distribution for PCNs and non-/mono- ortho PCBs in arctic air as has been observed for PAHs in recent studies at temperate locations.
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