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Kinetics of Brominated Flame Retardant (BFR) Releases from Granules of Waste Plastics
- Source :
- Environmental Science & Technology. 50:13419-13427
- Publication Year :
- 2016
- Publisher :
- American Chemical Society (ACS), 2016.
-
Abstract
- Plastic components of e-waste contain high levels of brominated flame retardants (BFRs), whose releases cause environmental and human health concerns. This study characterized the release kinetics of polybrominated diphenyl ethers (PBDEs) from millimeter-sized granules processed from the plastic exteriors of two scrap computer displays at environmentally relevant temperatures. The release rate of a substitute of PBDEs, 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE), from the waste plastics, was reported for the first time. Deca-BDE was the most abundant PBDE congeners in both materials (87ā89%), while BTBPE was also present at relatively high contents. The release kinetics of BFRs could be modeled as one-dimensional diffusion, while the temperature dependence of diffusion coefficients was well described by the Arrhenius equation. The diffusion coefficients of BFRs (at 30 °C) in the plastic matrices were estimated to be in the range of 10ā27.16 to 10ā19.96 m2·sā1, with apparent activation energies between 88...
- Subjects :
- Arrhenius equation
Chemistry
Diffusion
Kinetics
02 engineering and technology
General Chemistry
010501 environmental sciences
021001 nanoscience & nanotechnology
01 natural sciences
Hydrocarbons, Brominated
symbols.namesake
Human health
Polybrominated diphenyl ethers
Environmental chemistry
Brominated flame retardant
Halogenated Diphenyl Ethers
symbols
Environmental Chemistry
Organic chemistry
0210 nano-technology
Plastics
Environmental Monitoring
Flame Retardants
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 15205851 and 0013936X
- Volume :
- 50
- Database :
- OpenAIRE
- Journal :
- Environmental Science & Technology
- Accession number :
- edsair.doi.dedup.....b117d9e77ff817e52723c36501950dea