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@article{1159410,
author = {Lammel, Gerhard and Heil, A. and Stemmler, I. and Dvorská, Alice and Klánová, Jana},
article_location = {WASHINGTON},
article_number = {20},
doi = {http://dx.doi.org/10.1021/es401499q},
keywords = {POLYCYCLIC AROMATIC-HYDROCARBONS; DIBENZO-P-DIOXINS; PERSISTENT ORGANIC POLLUTANTS; AEROSOL-CLIMATE MODEL; SOUTH ATLANTIC TRANSECT; EMISSION FACTORS; HETEROGENEOUS REACTIVITY; ASSIMILATION SYSTEM; FOREST; FIRE},
language = {eng},
issn = {0013-936X},
journal = {ENVIRONMENTAL SCIENCE & TECHNOLOGY},
title = {On the Contribution of Biomass Burning to POPs (PAHs and PCDDs) in Air in Africa},
volume = {47},
year = {2013}
}
TY - JOUR
ID - 1159410
AU - Lammel, Gerhard - Heil, A. - Stemmler, I. - Dvorská, Alice - Klánová, Jana
PY - 2013
TI - On the Contribution of Biomass Burning to POPs (PAHs and PCDDs) in Air in Africa
JF - ENVIRONMENTAL SCIENCE & TECHNOLOGY
VL - 47
IS - 20
SP - 11616-11624
EP - 11616-11624
PB - AMER CHEMICAL SOC
SN - 0013936X
KW - POLYCYCLIC AROMATIC-HYDROCARBONS
KW - DIBENZO-P-DIOXINS
KW - PERSISTENT ORGANIC POLLUTANTS
KW - AEROSOL-CLIMATE MODEL
KW - SOUTH ATLANTIC TRANSECT
KW - EMISSION FACTORS
KW - HETEROGENEOUS REACTIVITY
KW - ASSIMILATION SYSTEM
KW - FOREST
KW - FIRE
N2 - Forest, savannah, and agricultural fires in the tropics and subtropics are sources for widespread pollution and release many organic substances into the air and soil, including persistent organic pollutants, i.e., polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and polycyclic aromatic hydrocarbons (PAHs). The significance of this source for the exposure of humans and the environment in Africa toward phenanthrene, fluoranthene, pyrene, benzo(a)-pyrene, 2,3,7,8-tetrachlorodibenzo-p-dioxin, 1,2,3,4,6,7,8-heptachlorodibenzo-p-dioxin, and octa-chlorodibenzo-p-dioxin is studied using daily global emissions from vegetation fires observed by satellite and a global multicompartment chemistry-transport model. Near-ground atmospheric concentrations of model-predicted vegetation fire related concentrations of PAHs and PCDDs were in the 10-1000 and 10(-5)-10(-3) pg m(-3) ranges, respectively. Vegetation fires in Africa are found to emit 180 +/- 25 kg yr(-1) of PCDD/Fs. By comparison with observations, it is found that fires explain 1-10% of the PCDD (5% of 2,3,7,8-tetrachlorodibenzo-p-dioxin) concentrations in the rural and background atmosphere of sub-Saharan Africa. The contribution of vegetation fires to exposure to PAH is probably >10%, but cannot be quantified due to lack of knowledge with regard to both emission factors and photochemistry. A sensitivity analysis suggests that the heterogeneous reaction of PAHs with ozone is effectively limiting atmospheric lifetime and long-range transport.
ER -
LAMMEL, Gerhard, A. HEIL, I. STEMMLER, Alice DVORSKÁ a Jana KLÁNOVÁ. On the Contribution of Biomass Burning to POPs (PAHs and PCDDs) in Air in Africa. \textit{ENVIRONMENTAL SCIENCE \&{}amp; TECHNOLOGY}. WASHINGTON: AMER CHEMICAL SOC, 2013, roč.~47, č.~20, s.~11616-11624. ISSN~0013-936X. Dostupné z: https://dx.doi.org/10.1021/es401499q.
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