2013
On the Contribution of Biomass Burning to POPs (PAHs and PCDDs) in Air in Africa
LAMMEL, Gerhard, A. HEIL, I. STEMMLER, Alice DVORSKÁ, Jana KLÁNOVÁ et. al.Základní údaje
Originální název
On the Contribution of Biomass Burning to POPs (PAHs and PCDDs) in Air in Africa
Autoři
LAMMEL, Gerhard (276 Německo, garant, domácí), A. HEIL (276 Německo), I. STEMMLER (276 Německo), Alice DVORSKÁ (203 Česká republika, domácí) a Jana KLÁNOVÁ (203 Česká republika, domácí)
Vydání
ENVIRONMENTAL SCIENCE & TECHNOLOGY, WASHINGTON, AMER CHEMICAL SOC, 2013, 0013-936X
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10511 Environmental sciences
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 5.481
Kód RIV
RIV/00216224:14310/13:00066743
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000326123600033
Klíčová slova anglicky
POLYCYCLIC AROMATIC-HYDROCARBONS; DIBENZO-P-DIOXINS; PERSISTENT ORGANIC POLLUTANTS; AEROSOL-CLIMATE MODEL; SOUTH ATLANTIC TRANSECT; EMISSION FACTORS; HETEROGENEOUS REACTIVITY; ASSIMILATION SYSTEM; FOREST; FIRE
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 8. 4. 2014 14:43, Ing. Andrea Mikešková
Anotace
V originále
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.
Návaznosti
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GAP503/11/1230, projekt VaV |
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