Atmospheric concentrations of organochlorine pesticides, polybrominated diphenyl ethers and polychloronaphthalenes in Nuuk, South-West Greenland

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• 作者：Rossana Bossi ; Henrik Skov ; Katrin Vorkamp ; Jesper Christensen ; Suresh C. Rastogi ; Axel Egelø ; v ; Dorthe Petersen
• 关键词：Greenland ; Atmosphere ; Chlorinated and brominated persistent organic pollutants
• 刊名：Atmospheric Environment
• 出版年：2008
• 出版时间：October 2008
• 年：2008
• 卷：42
• 期：31
• 页码：7293-7303
• 全文大小：519 K

文摘

Atmospheric concentrations of organochlorine pesticides (OCs), polybrominated diphenyl ethers (PBDEs) and polychloronaphthalenes (PCNs) were measured for the first time in Nuuk, Greenland in 2004 and 2005. The annual mean concentrations of the measured OCs were: α-HCH 20.2 pg m⁻³, γ-HCH (lindane) 5.1 pg m⁻³, endosulfan 4.8 pg m⁻³ and dieldrin 1.9 pg m⁻³. Concentrations of Σ-chlordanes, DDEs and heptachlor epoxide were generally similar and lower than those of α-HCH and γ-HCH. The concentrations of most chlorinated pesticides did not show any clear seasonal variation, with the exception of γ-HCH, which had maximum concentration in August in both years.

The average annual mean for ΣPBDEs was 1.14 ± 0.81 pg m⁻³. The predominant congeners measured in Nuuk were BDE-47 and BDE-99 followed by BDE-100, -153 and -28, indicating the use of penta-BDE technical products as the main source. A clear seasonal variation of PBDE concentrations was observed with maximum concentrations occurring in the summer months.

The ΣPCNs concentrations ranged between 0.062 and 0.258 pg m⁻³ with an annual mean concentration of 0.161 ± 0.004 pg m⁻³. The PCNs profile was dominated by the tetra-PCNs (74 % of the annual mean) and the penta-PCNs (18 % of the annual mean). A seasonal trend for ΣPCNs was not observed.

Atmospheric concentrations of the investigated compounds were correlated with temperature and anthropogenic CO in order to obtain information about their transport pattern. Positive correlations were found between CO and chlordanes, p,p′-DDE and trifluralin, while a negative correlation was found for γ-HCH. A significant correlation with temperature variations was found for dieldrin, heptachlor epoxide, α-HCH, γ-HCH, BDE-47, BDE-99 and tetra-PCNs, which indicates that re-emission of these compounds from previously contaminated surfaces as an important factor for the observed variations in concentrations.