Harner Tom, Pozo Karla, Gouin Todd, Macdonald Anne-Marie, Hung Hayley, Cainey Jill, Peters Andrew
Science & Technology Branch, Environment Canada, 4905 Dufferin Street, Toronto, ON, M3H 5T4, Canada.
Environ Pollut. 2006 Nov;144(2):445-52. doi: 10.1016/j.envpol.2005.12.053. Epub 2006 Apr 17.
Polyurethane foam (PUF) disks were deployed at global background sites, to test logistical issues associated with a global monitoring network for persistent organic pollutants (POPs). alpha-HCH, exhibited relatively high and uniform concentrations (17-150 pg/m3) at temperate and arctic sites with elevated concentrations associated with trans-Pacific inflow. Concentrations were much lower (<5 pg/m3) in Bermuda, Chile and Cape Grim. Concentrations for gamma-HCH, the main component of lindane, were spatially similar to the alpha-HCH pattern but lower in magnitude (typically, <10 pg/m3). Chlordane concentrations (sum of cis-chlordane, trans-chlordane and trans-nonachlor) were also low (<10 pg/m3). Dieldrin concentrations were in the range 2-25 pg/m3 at most sites but elevated in Bermuda. Back trajectories suggest that advection from Africa and the US may contribute. Endosulfan, a popular current-use pesticide, exhibited highest concentrations ranging from tens to hundreds of pg/m3. There was good agreement between duplicate samplers at each site and PUF disk-derived air concentrations agreed with high volume data. Few logistical/analytical problems were encountered in this pilot study.
聚氨酯泡沫（PUF）圆盘被部署在全球背景站点，以测试与持久性有机污染物（POPs）全球监测网络相关的后勤问题。α-六氯环己烷在温带和北极站点呈现出相对较高且均匀的浓度（17 - 150 pg/m³），浓度升高与跨太平洋气流有关。在百慕大、智利和格里姆角，浓度要低得多（<5 pg/m³）。林丹的主要成分γ-六氯环己烷的浓度在空间上与α-六氯环己烷的模式相似，但数值较低（通常<10 pg/m³）。氯丹浓度（顺式氯丹、反式氯丹和反式九氯之和）也很低（<10 pg/m³）。大多数站点的狄氏剂浓度在2 - 25 pg/m³范围内，但在百慕大有所升高。后向轨迹表明，来自非洲和美国的平流可能有影响。硫丹是一种目前常用的农药，其浓度最高，范围从几十到几百pg/m³。每个站点的重复采样器之间有良好的一致性，PUF圆盘得出的空气浓度与大容量数据相符。在这项初步研究中几乎没有遇到后勤/分析问题。
