Brominated flame retardants (BFRs) in PM2.5 associated with various source sectors in southern China,Environmental Science: Processes & Impacts

当前位置： X-MOL 学术 › Environ. Sci.: Processes Impacts › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Brominated flame retardants (BFRs) in PM2.5 associated with various source sectors in southern China
Environmental Science: Processes & Impacts ( IF 4.3 ) Pub Date : 2020-12-16 , DOI: 10.1039/d0em00443j
Qi-Qi Li _{1,

2,

3,

4,

5} , Tao Wang _{6,

7,

8,

9} , Yuan Zeng _{9,

10,

11,

12,

13} , Yun Fan _{1,

2,

3,

4,

5} , She-Jun Chen _{9,

10,

11,

12,

13} , Bi-Xian Mai _{1,

2,

3,

4,

5}

Affiliation

The present study investigates legacy and novel brominated flame retardants (BFRs) in atmospheric PM_2.5 associated with various urban source sectors in a city and electronic waste (e-waste) recycling facilities in southern China. The concentrations of polybrominated diphenyl ethers (PBDEs) and novel BFRs (∑₂NBFRs) at the urban industrial park (UIP) sites varied greatly from 22.0 to 105 pg m⁻³ and from to 29.7 to 459 pg m⁻³, respectively, and higher concentrations were generally found at sites involving industrial sectors of electronics, plastics, and machinery. Their spatial variations at other urban potential source sites were small suggesting a lack of strong point emissions. The levels of PBDEs and ∑₂NBFRs at the e-waste facilities (220–2356 pg m⁻³ and 83.6–569 pg m⁻³) were significantly higher and did not temporally decline, indicating that improvement in e-waste recycling techniques does not significantly reduce emissions of PBDEs. NBFRs dominated the BFRs at the urban sites (55% on average), while PBDEs were still dominant (78%) at the e-waste sites. PBDE congener profiles in PM_2.5 were substantially different from those in commercial mixtures. The congener profiles as well as their correlations suggested frequent formation of lower brominated PBDEs from degradation of highly brominated congeners in this region, which became appreciable due to the reduced emissions. The significant correlations among the lower brominated congeners also reflected similar environmental behaviors due to similar physicochemical properties.

更新日期：2021-01-11

点击分享查看原文

点击收藏

阅读更多本刊最新论文