Occurrence and air-water diffusive exchange legacy persistent organic pollutants in an oligotrophic north Patagonian lake

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Occurrence and air-water diffusive exchange legacy persistent organic pollutants in an oligotrophic north Patagonian lake

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Occurrence and air-water diffusive exchange legacy persistent organic pollutants in an oligotrophic north Patagonian lake

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30304 - Public and environmental health

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Environmental Research

ISSN

0013-9351

e-ISSN

—

Svazek periodika

204

Číslo periodika v rámci svazku

March 2022

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

1-9

Kód UT WoS článku

000704705800001

EID výsledku v databázi Scopus

2-s2.0-85115240934