LAO Qibin1,2,3, BU Dezhi1,2, ZHANG Kexin1,2, SUN Xia1,2, KE Xiurong1,2, CHEN Fajin3，CHEN Liqi1,2, JIAO Liping1,2
（1. Third Institute of Oceanography, State Oceanic Administration (SOA), xiamen 361005, China;
2. Key Laboratory of Global Change and Marine-Atmospheric Chemistry of SOA, Xiamen 361005, China;
3. Guangdong Ocean University, Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction, Zhanjiang 524088 China）
Abstract: Atmospheric particulates samples were collected in autumn and winter (from 2006 to 2008) at the western coast of Taiwan Strait, the levels and compositions of 28 Polychlorinated Biphenyls (PCBs) congeners, including indicator PCBs and dioxin-like-PCBs, were analyzed to investigate possible sources of atmospheric PCBs, and to estimate their dry deposition fluxes. The results showed that the concentration ranges of total PCBs in atmospheric particulate samples were 0.43-53.55, 2.07-81.14 and 3.79-153.39 pg/m3, respectively, for from 2006 to 2008, the high-chlorinated PCBs were dominated components, and the toxic equivalents (TEQs) of Dixon-like-PCBs were similar to those reported for urban areas. It was observed that concentrations of PCBs were higher in winter than in autumn. The concentrations of PCBs showed upward trends from 2006 to 2008, indicating ascendant automobile and industrial emissions in Xiamen. The air mass backward trajectory analyses showed the higher concentration of PCBs in winter resulted mainly from heating and industrial emissions from the north, while the air mass in autumn mostly came from the “clean” air of ocean. Dry deposition fluxes of PCBs in Xiamen Island were 3.79 and 8.32 ng/（m2？d）. The input of PCBs from atmosphere to the Taiwan Strait via dry deposition were 22 kg and 47 kg.
Key words: Polychlorinated Biphenyls (PCBs); atmospheric particulates; dry deposition flux; seasonal variation; Xiamen
EARTH AND ENVIRONMENT Vol.46, No.5, Tot No.325, 2018, Page 429-436
