Characteristics of background conditions and potential source areas of atmospheric perfluorinated greenhouse gases in the Yangtze River Delta

PU Jing-jiao; XU Hong-hui; YAO Bo; ZHANG Chao; SHAN Meng

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China Environmental Science ›› 2022, Vol. 42 ›› Issue (10) : 4494-4500.

Characteristics of background conditions and potential source areas of atmospheric perfluorinated greenhouse gases in the Yangtze River Delta

PU Jing-jiao¹, XU Hong-hui¹, YAO Bo², ZHANG Chao³, SHAN Meng⁴

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Abstract

The concentrations of perfluorinated greenhouse gases (PFCs, SF₆, NF₃ and SO₂F₂) were measured by means of canister sampling at Lin'an regional atmospheric background station, which was located in the Yangtze River Delta. The characteristics and long-term trends of the concentrations of these perfluorinated greenhouse gases from 2011 to 2020 were analyzed. The results showed that the concentrations of most perfluorinated greenhouse gases at Lin'an station had been increasing year by year. At 2020, the background concentrations of perfluorinated greenhouse gases in the Yangtze River Delta had reached the level of (86.30±0.52)×10^-12 (CF₄), (5.03±0.00)×10^-12 (C₂F₆), (0.70±0.01)×10^-12 (C₃F₈), (1.82±0.00)×10^-12 (c-C₄F₈), (10.44±0.01)×10^-12 (SF₆), (2.36±0.04)×10^-12 (NF₃), (2.61±0.05)×10^-12 (SO₂F₂), respectively, which were in consistent with the global background levels. Both Potential Source Contribution Function (PSCF) and Concentration-weighted Trajectory (CWT) methods were applied to reveal the potential source areas of perfluorinated greenhouse gases at Lin'an station. The results indicated that the potential source areas of PFCs (including CF₄, C₄F₁₀, C₂F₆, C₃F₈and c-C₄F₈) mainly covered the provinces of Shandong, Jiangsu, Anhui, Shanghai, Northern and Central Zhejiang and Northeast Jiangxi, while the potential source areas of NF₃, SF₆ and SO₂F₂ were concentrated in Central and Southern Jiangsu, Shanghai and Northern Zhejiang.

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concentration / perfluorinated greenhouse gas / potential source area / Yangtze River Delta

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PU Jing-jiao, XU Hong-hui, YAO Bo, ZHANG Chao, SHAN Meng. Characteristics of background conditions and potential source areas of atmospheric perfluorinated greenhouse gases in the Yangtze River Delta[J]. China Environmental Science. 2022, 42(10): 4494-4500

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