| ALARCON, Paulo C., Zoran KITANOVSKI, Mohsen PADERVAND, Ulrich POESCHL, Gerhard LAMMEL and Cornelius ZETZSCH. Atmospheric Hydroxyl Radical Reaction Rate Coefficient and Total Environmental Lifetime of α-Endosulfan. ENVIRONMENTAL SCIENCE & TECHNOLOGY. WASHINGTON: AMER CHEMICAL SOC, 2023, vol. 57, No 42, p. 15999-16005. ISSN 0013-936X. Available from: https://dx.doi.org/10.1021/acs.est.3c06009. |
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@article{2364377,
author = {Alarcon, Paulo C. and Kitanovski, Zoran and Padervand, Mohsen and Poeschl, Ulrich and Lammel, Gerhard and Zetzsch, Cornelius},
article_location = {WASHINGTON},
article_number = {42},
doi = {http://dx.doi.org/10.1021/acs.est.3c06009},
keywords = {hydroxyl radical; reaction kinetics; organochlorinepesticide; persistent organic pollutant; multicompartmentaldistribution},
language = {eng},
issn = {0013-936X},
journal = {ENVIRONMENTAL SCIENCE & TECHNOLOGY},
title = {Atmospheric Hydroxyl Radical Reaction Rate Coefficient and Total Environmental Lifetime of α-Endosulfan},
url = {https://pubs.acs.org/doi/10.1021/acs.est.3c06009},
volume = {57},
year = {2023}
}
TY - JOUR
ID - 2364377
AU - Alarcon, Paulo C. - Kitanovski, Zoran - Padervand, Mohsen - Poeschl, Ulrich - Lammel, Gerhard - Zetzsch, Cornelius
PY - 2023
TI - Atmospheric Hydroxyl Radical Reaction Rate Coefficient and Total Environmental Lifetime of α-Endosulfan
JF - ENVIRONMENTAL SCIENCE & TECHNOLOGY
VL - 57
IS - 42
SP - 15999-16005
EP - 15999-16005
PB - AMER CHEMICAL SOC
SN - 0013936X
KW - hydroxyl radical
KW - reaction kinetics
KW - organochlorinepesticide
KW - persistent organic pollutant
KW - multicompartmentaldistribution
UR - https://pubs.acs.org/doi/10.1021/acs.est.3c06009
N2 - Endosulfan is a persistent organochlorine pesticide that was globally distributed before it was banned and continues to cycle in the Earth system. The chemical kinetics of the gas-phase reaction of alpha-endosulfan with the hydroxyl radical (OH) was studied by means of pulsed vacuum UV flash photolysis and time-resolved resonance fluorescence (FP-RF) as a function of temperature in the range of 348-395 K and led to a second-order rate coefficient k(OH) = 5.8 x 10(-11) exp(-1960K/T) cm(3) s(-1) with an uncertainty range of 7 x 10(-12) exp(-1210K/T) to 4 x 10(-10) exp(-2710K/T) cm(3) s(-1). This corresponds to an estimated photochemical atmospheric half-life in the range of 3-12 months, which is much longer than previously assumed (days to weeks). Comparing the atmospheric concentrations observed after the global ban of endosulfan with environmental multimedia model predictions, we find that photochemical degradation in the atmosphere is slower than the model-estimated biodegradation in soil or water and that the latter limits the total environmental lifetime of endosulfan. We conclude that the lifetimes typically assumed for soil and aquatic systems are likely underestimated and should be revisited, in particular, for temperate and warm climates.
ER -
ALARCON, Paulo C., Zoran KITANOVSKI, Mohsen PADERVAND, Ulrich POESCHL, Gerhard LAMMEL and Cornelius ZETZSCH. Atmospheric Hydroxyl Radical Reaction Rate Coefficient and Total Environmental Lifetime of α-Endosulfan. \textit{ENVIRONMENTAL SCIENCE \&{}amp; TECHNOLOGY}. WASHINGTON: AMER CHEMICAL SOC, 2023, vol.~57, No~42, p.~15999-16005. ISSN~0013-936X. Available from: https://dx.doi.org/10.1021/acs.est.3c06009.
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