Atmospheric Short-Chain Chlorinated Paraffins in China, Japan, and South Korea

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• 作者：Qilu Li ; Jun Li ; Yan Wang ; Yue Xu ; Xiaohui Pan ; Gan Zhang ; Chunling Luo ; Yuso Kobara ; Jae-Jak Nam ; Kevin C. Jones
• 刊名：Environmental Science & Technology (ES&T)
• 出版年：2012
• 出版时间：November 6, 2012
• 年：2012
• 卷：46
• 期：21
• 页码：11948-11954
• 全文大小：331K
• 年卷期：v.46,no.21(November 6, 2012)
• ISSN：1520-5851

文摘

This study presents the first investigation of concentrations and congener group patterns of atmospheric short-chain chlorinated paraffins (SCCPs) throughout East Asia. Based on an absorption rate calibration experiment, a spatial survey of SCCPs was performed using passive air samplers in China, Japan, and South Korea during two separate periods in 2008. The atmospheric concentrations of SCCPs in China were clearly greater than those in Japan and South Korea, both of which exceed the levels determined for other regions of the world. C₁₀ components were the most abundant type of SCCPs in China, whereas C₁₁ components were dominant in Japan and South Korea. With respect to the total chlorine content, Cl₆ and Cl₅ were the predominant compounds in China and Japan; however, Cl₆ and Cl₇ were predominant in South Korea. A similar pattern was also found for remote sites within China, Japan, and South Korea, respectively. Together with the back-trajectories calculated for the remote sites, the results indicate that the SCCPs in the air of East Asia were mainly influenced by local sources due to their relatively low long-range atmospheric transport potential compared to other POPs.