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@article{827636,
author = {Lammel, Gerhard and Sehili, Aissa M and Bond, Tami C and Feichter, Johann and Grassl, Hartmut},
article_location = {Oxford},
article_number = {10.03.2009},
keywords = {Polycyclic aromatic hydrocarbons Gas-particle partitioning Long-range transport Multicompartmental modelling},
language = {eng},
issn = {0045-6535},
journal = {Chemosphere},
title = {Gas/particle partitioning and global distribution of polycyclic aromatic hydrocarbons, a modelling approach},
url = {http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V74-4VT5CG9-3&_user=28762&_coverDate=03%2F10%2F2009&_rdoc=68&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235832%239999%23999999999%2399999%23FLA%23display%23Articles)&_cdi=5832&_sort=d&_docancho},
volume = {not specif},
year = {2009}
}
TY - JOUR
ID - 827636
AU - Lammel, Gerhard - Sehili, Aissa M - Bond, Tami C - Feichter, Johann - Grassl, Hartmut
PY - 2009
TI - Gas/particle partitioning and global distribution of polycyclic aromatic hydrocarbons, a modelling approach
JF - Chemosphere
VL - not specif
IS - 10.03.2009
SP - 2009.02.017
EP - 2009.02.017
PB - Elsevier
SN - 00456535
KW - Polycyclic aromatic hydrocarbons Gas-particle partitioning Long-range transport Multicompartmental modelling
UR - http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V74-4VT5CG9-3&_user=28762&_coverDate=03%2F10%2F2009&_rdoc=68&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235832%239999%23999999999%2399999%23FLA%23display%23Articles)&_cdi=5832&_sort=d&_docancho
N2 - The global atmospheric distribution and long-range transport (LRT) potential of three polycyclic aromatic hydrocarbons (PAH), anthracene, fluoranthene and benzo[a]pyrene, are studied. The model used is a global aerosol-chemistry-transport-model, which is based on an atmospheric general circulation model. The model includes an in-built dynamic aerosol model coupled to two-dimensional surface compartments. Several parameterisations of gas/particle partitioning and different assumptions of degradation in the aerosol particulate phase were tested. PAHs are mostly distributed in the source regions but reach the Arctic and the Antarctic. The Canadian Arctic is predicted to be significantly less affected by mid-latitude PAH emissions than the European Arctic. Re-volatilisation is significant for semivolatile PAHs. Accumulation of semivolatile PAHs in polar regions, however, is not indicated. The model study suggests that gas/particle partitioning in air drastically influences the atmospheric cycling, the total environmental fate (e.g. compartmental distributions) and the LRT potential of the substances studied. A parameterisation which calculates the gas/particle partitioning assuming absorption into organic matter and adsorption to black carbon (soot) agrees best with the observations at remote sites. The study provides evidence that the degradation in the particulate phase must be slower than that in the gas-phase. The predicted concentrations of the semivolatile PAHs anthracene and fluoranthene in near-ground air at remote sites in mid and high northern latitudes are in line with measured concentrations, if adsorption of the substances to soot combined with absorption in particulate organic matter is assumed to determine gas/particle partitioning, but cannot be explained by adsorption alone (Junge Pankow parameterisation of gas/particle partitioning). The results suggest that PAHs absorbed in the organic matrix of particulate matter is shielded from the gas-phase.
ER -
LAMMEL, Gerhard, Aissa M SEHILI, Tami C BOND, Johann FEICHTER and Hartmut GRASSL. Gas/particle partitioning and global distribution of polycyclic aromatic hydrocarbons, a modelling approach. \textit{Chemosphere}. Oxford: Elsevier, 2009, not specif, 10.03.2009, p.~2009.02.017, 9 pp. ISSN~0045-6535.
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