%0 Journal Article
%T Spatial distribution of atmospheric PCBs in winter Pearl River Delta
珠三角地区冬季大气中PCBs的空间分布
%A LI Chunlei
%A HAO Yongmei
%A MAI Bixian
%A SHENG Guoying
%A FU Jiamo
%A
李春雷
%A 郝永梅
%A 麦碧娴
%A 盛国英
%A 傅家谟
%J 环境科学学报
%D 2007
%I
%X To study the spatial distribution of atmospheric PCBs in winter Pearl River Delta, air samples were collected from 24/12/2001 to 16/1/2002 in urban, suburban and background of Guangzhou city. Atmospheric PCBs were analysed by GC-MS-SIM mode. The result indicated that the winter concentrations of atmospheric PCBs decreased in the order of urban, suburban and background. The average PCBs concentration in urban area was 1.61 times as that in suburban and 2.54 times as that in background. The homologue patterns of PCB concentrations were geographically different among urban, suburban and background. The concentrations of lower chlorinated congeners in urban atmosphere were much higher than those in suburban and background atmosphere, while for the higher chlorinated congeners, the spatial difference was not significant. With respect to the spatial distribution of PCB homologues, tri- and tetra-CBs were identified as the main components. The summed contributions of these two components were similar among the three areas, with values of 77.21%, 77.19%, and 81.10%. The percentages of tri- and tetra-CBs were similar in the urban and suburban atmosphere, while in the background atmosphere, the percentage of tetra-CBs was nearly two times as that of tri-CBs, with value of 52.79%. The average contributions of penta-CBs to the total atmospheric PCBs were similar between suburban and background area, with values of 9.65% and 10.87%. Taking only particulate PCBs into account, the percentages of penta-CBs were well consistent among urban, suburban and background area, with values of 15.20%, 16.23%, and 15.87%. The slopes of log Kp versus log PL were -0.60, 0.42 and -0.45 for urban, suburban and background, respectively, which were larger (shallower) than the expected theoretical value of -1.
%K Pearl River Delta
%K polychlorinated biphenels (PCBs)
%K spatial distribution
%K homologue pattern
%K log Kp vs log PoL
珠三角
%K PCBs
%K 空间分布
%K 氯数分布
%K log
%K Kp
%K vs
%K log
%K PLo
%K 珠三角地区
%K 冬季
%K 大气
%K PCBs
%K 空间分布
%K Pearl
%K River
%K Delta
%K winter
%K atmospheric
%K distribution
%K 平衡状态
%K 分配
%K 回归分析
%K 一致性
%K 颗粒相
%K 比较
%K 贡献率
%K 空间差异
%K 浓度比
%K 氯取代
%K 地区差异
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=815415A8B6CEB9268BB29BFEFCDDF0EF&yid=A732AF04DDA03BB3&vid=DB817633AA4F79B9&iid=E158A972A605785F&sid=04FC77FB58A9B53A&eid=00520952CD4BF212&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=7&reference_num=17