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Air monitoring of polychlorinated biphenyls, polybrominated diphenyl ethers and organochlorine pesticides in West Antarctica during 2011-2017: Concentrations, temporal trends and potential sources
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China.
Örebro universitet, Institutionen för naturvetenskap och teknik. (MTM Research Center)ORCID-id: 0000-0002-5729-1908
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2019 (engelsk)Inngår i: Environmental Pollution, ISSN 0269-7491, E-ISSN 1873-6424, Vol. 249, s. 381-389Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Annual air samples were collected at various sites in the Fildes Peninsula, West Antarctica from December 2010 to January 2018 using XAD-2 resin passive air samplers to investigate concentrations, temporal trends and potential sources of persistent organic pollutants (POPs) in Antarctic air. Relatively low concentrations of polychlorinated biphenyls (PCBs) (Σ19PCBs: 1.5-29.7 pg/m3), polybrominated diphenyl ethers (PBDEs) (Σ12PBDEs: 0.2-2.9 pg/m3) and organochlorine pesticides (OCPs) (Σ13OCPs: 101-278 pg/m3) were found in the atmosphere of West Antarctica. PCB-11, BDE-47 and hexachlorobenzene (HCB) were the predominant compounds in the atmosphere. The concentrations of PCBs, HCHs, DDTs and endosulfans were found to show decreasing temporal trends, whereas uniform temporal trends were observed for HCB. The atmospheric half-life values for PCBs, HCHs, DDTs and endosulfans in Antarctic air were estimated for the first time, using regressions of the natural logarithm of the concentrations versus the number of years, obtaining the values of 2.0, 2.0, 2.4 and 1.2 year, respectively. An increasing ratio of α-HCH/γ-HCH indicated long residence time for α-HCH and possible transformation of γ-HCH to α-HCH in the atmosphere. The ratios of p,p'-DDT/p,p'-DDE were mostly lower than unity in this study, which could be attributed to aged sources. It was found that long-range atmospheric transport was still considered to be the main contributing factor to the atmospheric levels of the POPs in West Antarctica whereas the contribution of human activities at the Chinese Great Wall Station was minor. The results of this study give a view on the most recent temporal trends and provide new insights regarding the occurrence of various POPs in the Antarctic atmosphere.

sted, utgiver, år, opplag, sider
Elsevier, 2019. Vol. 249, s. 381-389
Emneord [en]
Antarctica, Atmosphere, POPs, Passive air sampling, Temporal trends
HSV kategori
Identifikatorer
URN: urn:nbn:se:oru:diva-74571DOI: 10.1016/j.envpol.2019.03.039ISI: 000471081300042PubMedID: 30913437Scopus ID: 2-s2.0-85063617873OAI: oai:DiVA.org:oru-74571DiVA, id: diva2:1320394
Merknad

Funding Agencies:

National Basic Research Program of China  2015CB453101 

National Natural Science Foundation of China  21477155  91743206  21777186  41676183  21621064 

Strategic Priority Research Program of the Chinese Academy of Sciences  XDB14010100 

Tilgjengelig fra: 2019-06-04 Laget: 2019-06-04 Sist oppdatert: 2019-07-23bibliografisk kontrollert

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