Wet deposition of brominated flame retardants to the Great Lakes basin - Status and trends

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• 作者：Matthew Robson ; Lisa Melymuk ; Lisa Bradley ; Brenda Treen ; Sean Backus
• 关键词：Brominated flame retardants ; Wet deposition ; Great Lakes ; Temporal trends ; Spatial trends
• 刊名：Environmental Pollution
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：182
• 期：Complete
• 页码：299-306
• 全文大小：1740 K

文摘

This study examined the temporal and spatial trends in wet deposition of 19 legacy and emerging brominated flame retardants (14 polybrominated diphenyl ethers (PBDEs), 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE), decabromodiphenylethane (DBDPE), hexabromocyclododecane (HBCD) and pentabromoethylbenzene (PBEB)) at 9 sites in the Canadian Great Lakes between 2004 and 2010. Concentrations of BDE-209 in wet deposition declined significantly. This indicates that the voluntary actions taken to phase out the use of BDE 209 in North America are having an immediate effect on its environment concentrations. The analysis also revealed the presence of 22 short-term high concentration events that dominated overall wet deposition loadings of current-use BFRs to the lakes. For instance, one sample in 2007 was responsible for 37 % of the total loadings of HBCD to Lake Huron over the entire six-year sampling period. This questions the current paradigm of how we believe such pollutants enter the environment.