Deng W J, Zheng J S, Bi X H, Fu J M, Wong M H
Croucher Institute for Environmental Sciences and Department of Biology, Hong Kong Baptist University, Kowloon, Hong Kong.
Environ Int. 2007 Nov;33(8):1063-9. doi: 10.1016/j.envint.2007.06.007. Epub 2007 Jul 12.
Air samples of total suspended particles (TSP, particles less than 30-60 microm), and particles with aerodynamic diameter smaller than 2.5 microm (PM(2.5)) were collected simultaneously at Guiyu (an electronic waste recycling site), three urban sites in Hong Kong and two urban sites in Guangzhou, South China from 16 August to 17 September 2004. Twenty-two PBDE congeners (BDE-3, -7, -15, -17, -28, -49, -71, -47, -66, -77, -100, -119, -99, -85, -126, -154, -153, -138, -156, -184, -183, -191) in TSP and PM(2.5) were measured. The results showed that the overall average concentrations of TSP and PM(2.5) collected at Guiyu were 124 and 62.1 microg m(-3), respectively. The monthly concentrations of the sum of 22 BDE congeners contained in TSP and PM(2.5) at Guiyu were 21.5 and 16.6 ng m(-3), with 74.5 and 84.3%, contributed by nine congeners (BDE-28, -47, -66, -100, -99, -154, -153, -183 and -191 respectively). This pattern was similar to Tsuen Wan site of Hong Kong. Two urban sites of Guangzhou had the same congener pattern, but were different from Yuen Long and Hok Tsui sites of Hong Kong. The results also showed that the amount of mono to penta brominated congeners, which are more toxic, accounted for 79.4-95.6% of Sigma(22)PBDEs from all sites. All congeners tested in Guiyu were up to 58-691 times higher than the other urban sites and more than 100 times higher than other studies reported elsewhere. The higher concentration in the air was due to heating or opening burning of electronic waste since PBDEs are formed when plastics containing brominated flame retardants are heated.
2004年8月16日至9月17日，在中国南方的贵屿（一个电子垃圾回收场）、香港的三个城市地点以及广州的两个城市地点，同时采集了总悬浮颗粒物（TSP，粒径小于30 - 60微米的颗粒物）和气动力学直径小于2.5微米的颗粒物（PM₂.₅）的空气样本。测定了TSP和PM₂.₅中的22种多溴二苯醚同系物（BDE - 3、- 7、- 15、- 17、- 28、- 49、- 71、- 47、- 66、- 77、- 100、- 119、- 99、- 85、- 126、- 154、- 153、- 138、- 156、- 184、- 183、- 191）。结果表明，在贵屿采集的TSP和PM₂.₅的总体平均浓度分别为12,4和62.1微克/立方米。贵屿TSP和PM₂.₅中22种多溴二苯醚同系物总和的月浓度分别为21.5和16.6纳克/立方米，其中9种同系物（分别为BDE - 28、- 47、- 66、- 100、- 99、- 154、- 153、- 183和- 191）分别占74.5%和84.3%。这种模式与香港荃湾站点相似。广州的两个城市地点具有相同的同系物模式，但与香港的元朗和鹤咀站点不同。结果还表明，毒性更强的一至五溴代同系物的量占所有站点Σ₂₂PBDEs的79.4 - 95.6%。在贵屿测试的所有同系物比其他城市站点高出58 - 691倍，比其他地方报道的其他研究高出100倍以上。空气中浓度较高是由于电子垃圾的加热或露天焚烧，因为当含有溴化阻燃剂的塑料受热时会形成多溴二苯醚。
