Occurrence and air-water diffusive exchange legacy persistent organic pollutants in an oligotrophic north Patagonian lake
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F22%3A00125074" target="_blank" >RIV/00216224:14310/22:00125074 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0013935121013372?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0013935121013372?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.envres.2021.112042" target="_blank" >10.1016/j.envres.2021.112042</a>
Alternative languages
Result language
angličtina
Original language name
Occurrence and air-water diffusive exchange legacy persistent organic pollutants in an oligotrophic north Patagonian lake
Original language description
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.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
30304 - Public and environmental health
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Environmental Research
ISSN
0013-9351
e-ISSN
—
Volume of the periodical
204
Issue of the periodical within the volume
March 2022
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
1-9
UT code for WoS article
000704705800001
EID of the result in the Scopus database
2-s2.0-85115240934