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Dechlorane Plus in the Global Atmosphere
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2020-10-21 , DOI: 10.1021/acs.estlett.0c00758
Jasmin K. Schuster 1 , Tom Harner 1 , Ed Sverko 2
Affiliation  

Dechlorane plus (DP) is a high-production volume chlorinated flame retardant, which is under consideration for listing under the Stockholm Convention on Persistent Organic Pollutants. In this study, we provide additional and timely information to help evaluate the spatial and temporal trends and long-range transport potential of DP at 67 sampling sites. The Global Atmospheric Passive Sampling network has been deploying passive air samplers quarterly since 2005. A retrospective analysis of samples from 2005 and 2006 indicates that DP is globally distributed in air with total DP levels ranging from nondetect to 30 pg/m3. The median value at urban sites (∼0.9 pg/m3) was approximately 10 times greater than at background, rural, and agricultural sites. The anti-DP/syn-DP ratio was relatively consistent across most site categories and in the range of values measured in commercial products containing DP. This suggests that both isomers are about equally capable of long-range transport in air. A retrospective analysis for selected sites covering the period of 2005–2011 showed declining levels of DP at urban sites in Paris and Toronto.

中文翻译:

全球大气中的Dechlorane Plus

Dechlorane plus(DP)是一种高产量的氯化阻燃剂,正在考虑将其列入《关于持久性有机污染物的斯德哥尔摩公约》。在这项研究中,我们提供了其他及时的信息,以帮助评估67个采样点上DP的时空趋势和远距离运输潜力。自2005年以来,全球大气无源采样网络一直在每季度部署无源空气采样器。对2005年和2006年的样本进行回顾性分析表明,DP分布在空气中,其总DP含量范围从未检测到30 pg / m 3。城市场所的中位值(〜0.9 pg / m 3)约为背景,农村和农业站点的十倍。在大多数站点类别中以及在包含DP的商业产品中测得的值范围内,抗DP / syn-DP比率相对一致。这表明两种异构体在空气中的远距离迁移能力大致相同。对2005年至2011年期间选定地点的回顾性分析表明,巴黎和多伦多的城市地点的DP水平下降。
更新日期:2020-10-21
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