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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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