Summer atmospheric polybrominated diphenyl ethers in urban and rural areas of northern China

High levels of polybrominated diphenyl ethers (PBDEs) have been extensively reported in urban areas and at e-waste recycling sites in coastal China. However, data are scarce in northern China and are not available in rural areas at all. In addition, it is often believed that air concentrations in rural areas are lower than those in urban areas without distinguishing rural residential areas and open fields. In this study, air samples were collected at 17 sites covering urban and rural (residential and open field) areas in northern China using active samplers. With BDE-209 dominated in all congeners, the average concentrations of BDE-209 (41 ± 72 pg/m3) and other 13 PBDEs (16 ± 12 pg/m3) were significantly lower than those found in south China, such as in Guangzhou or Hong Kong. On average, the total PBDE concentrations at the urban sites were 2.2 and 2.9 times of those at the rural residential and field sites, respectively.

Concentration of PBDEs at each site of the studied area.Figure optionsDownload as PowerPoint slideHighlights
► High levels of PBDEs with BDE-209 domination were detected in air in northern China.
► PBDE concentrations in rural residential areas were significantly higher than those in rural open fields.
► Proportions of BDE-209 in urban areas were higher than those in rural areas.
► PBDE concentrations were correlated to local population density and Gross Domestic Production.