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@article{1806680,
author = {Luarte, Thais and Tucca, Felipe and Nimptsch, Jorge and Woelfl, Stefan and Casas, Gemma and Dachs, Jordi and Chiang, Gustavo and Pozo, Karla Andrea and Barra, Ricardo and GalbanandMalagon, Cristobal},
article_location = {SAN DIEGO},
article_number = {March 2022},
doi = {http://dx.doi.org/10.1016/j.envres.2021.112042},
keywords = {North patagonian lakes; Air-water exchange; Legacy pollutants; Pesticides; South America},
language = {eng},
issn = {0013-9351},
journal = {Environmental Research},
title = {Occurrence and air-water diffusive exchange legacy persistent organic pollutants in an oligotrophic north Patagonian lake},
url = {https://www.sciencedirect.com/science/article/pii/S0013935121013372?via%3Dihub},
volume = {204},
year = {2022}
}
TY - JOUR
ID - 1806680
AU - Luarte, Thais - Tucca, Felipe - Nimptsch, Jorge - Woelfl, Stefan - Casas, Gemma - Dachs, Jordi - Chiang, Gustavo - Pozo, Karla Andrea - Barra, Ricardo - Galban-Malagon, Cristobal
PY - 2022
TI - Occurrence and air-water diffusive exchange legacy persistent organic pollutants in an oligotrophic north Patagonian lake
JF - Environmental Research
VL - 204
IS - March 2022
SP - 1-9
EP - 1-9
PB - ACADEMIC PRESS INC ELSEVIER SCIENCE
SN - 00139351
KW - North patagonian lakes
KW - Air-water exchange
KW - Legacy pollutants
KW - Pesticides
KW - South America
UR - https://www.sciencedirect.com/science/article/pii/S0013935121013372?via%3Dihub
N2 - In this study, the occurrence and diffusive air-water exchange of POPs in Panguipulli Lake (39 degrees 42' S-72 degrees 13' W), an oligotrophic lake located in northern Patagonia (Chile), were determined. Air and water samples were collected between March and August 2017 (autumn-winter) and analyzed for concentrations of OCPs (alpha-HCH, beta-HCH, gamma-HCH and HCB) and PCBs (PCB-28,-52,-101,-118,-153,-158,-180) using gas chromatography coupled with an electron capture detector. The direction of air-water exchange direction was evaluated using a fugacity approach (f(w) f(a)(-1)), and net diffusive exchange fluxes (F-AW, ng m(-2) d(-1)) were also estimated. Total Sigma 4OCP levels in air ranged from 0.31 to 37 pg m(-3), with a maximum for beta-HCH, while Sigma 7PCB levels ranged from 3.05 to 43 pg m(-3). The most abundant congener was PCB-153, accounting for 60% of the total PCBs in air. Surface water Sigma(4)OCPs measured in this study ranged from 1.01 to 3.9 pg L-1, with gamma-HCH predominating, while surface water Sigma 7PCB levels ranged from 0.32 to 24 pg L-1, with PCB-101, PCB-118, and PCB-153 presenting the highest levels. Diffusive air-water exchanges of HCB, alpha-HCH, gamma-HCH and PCBs in the form of volatilization from the lake to air predominated; in contrast, for beta-HCH net deposition dominated during the sampling period. Estimates suggested faster microbial degradation in the dissolved phase compared to atmospheric degradation for all analyzed POPs. Overall, these results could indicate that the oligotrophic lakes of northern Patagonia act as a secondary source of atmospheric POPs, mainly PCBs and some OCPs. This study is a first attempt to understand the occurrence of POPs in air and water, as well as their dynamics in oligotrophic lakes in the southern hemisphere.
ER -
LUARTE, Thais, Felipe TUCCA, Jorge NIMPTSCH, Stefan WOELFL, Gemma CASAS, Jordi DACHS, Gustavo CHIANG, Karla Andrea POZO, Ricardo BARRA a Cristobal GALBAN-MALAGON. Occurrence and air-water diffusive exchange legacy persistent organic pollutants in an oligotrophic north Patagonian lake. \textit{Environmental Research}. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE, 2022, roč.~204, March 2022, s.~1-9. ISSN~0013-9351. Dostupné z: https://dx.doi.org/10.1016/j.envres.2021.112042.
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