Pyrolysis and its influence factors of decabromodiphenyl ether
LIU Peng-yan1,2, ZHANG Ya-jing1, ZHANG Yan-na1, ZHANG Rui-rui1, SUN Jia-hui1
1. College of Chemical and Environmental Science, Hebei University, Baoding 071002, China;
2. Key Laboratory of Analytical Science, Hebei University, Baoding 071002, China
This study investigates influence factors and thermal degradation of decabromodiphenyl ether(BDE-209) under the temperature range of 200~300℃. The results indicated that pyrolysis of BDE-209 was affected by temperature, time and common metal salts which were produced during the manufacturing and processing of printed circuit boards, such as copper nitrate, ferric chloride, aluminum chloride and zinc chloride. Pyrolysis of BDE-209 could be accelerated with the rise of temperature and extension of pyrolysis time. Results showed a greater impact of temperature on pyrolysis than that of time. A significant acceleration of pyrolysis was detected with copper nitrate, ferric chloride and aluminum chloride with degradation rates of BDE-209 in copper nitrate >ferric chloride >aluminum chloride. Pyrolysis of BDE-209 was inhibited with the presence of zinc chloride. Acceleration of aluminum chloride and inhibition of zinc chloride were weakened with the increase of temperature. This research results can provide a scientific basis for further study on the release and degradation of BDE-209 from electronic waste during the thermal treatment.
Shin J, Boo H, Bang E, et al. Development of a clean-up method for polybrominated diphenyl ether(PBDE) in fish by freezing-lipid filtration[J]. Eur. Food Res. Technol., 2012,235(2):295-301.
Zhang S H, Xu X J, Wu Y S, et al. Polybrominated diphenyl ethers in residential and agricultural soils from an electronic waste polluted region in South China:Distribution, compositional profile, and sources[J]. Chemosphere, 2014,102(5):55-60.
Wang X T, Chen L, Wang X K, et al. Occurrence, profiles, and ecological risks of polybrominated diphenyl ethers(PBDEs) in river sediments of Shanghai, China[J]. Chemosphere, 2015,133:22-30.
[8]
Airaksinen R, Hallikainen A, Rantakokko P, et al. Levels and Congener Profiles of PBDEs in Edible Baltic, Freshwater, and Farmed Fish in Finland[J]. Environ. Sci. Techno.l, 2015,49:3851-3859.
[9]
Lake I R, Foxall C D, Fernandes A, et al. Effects of river flooding on polybrominated diphenyl ether(PBDE) levels in cows' milk, soil, and grass[J]. Environ. Sci. Technol., 2011,45(11):5017-5024.
[10]
Tang Z W, Huang Q F, Cheng J L, et al. Polybrominated diphenyl ethers in soils, sediments, and human hair in a plastic waste recycling area:a neglected heavily polluted area[J]. Environ. Sci. Technol., 2014,48(3):1508-1516.
Stiborovaa H, Vrkoslavovaa J, Loveckaa P, et al. Aerobic biodegradation of selected polybrominated diphenyl ethers(PBDEs) in wastewater sewage sludge[J]. Chemosphere, 2015, 118:315-321.
[15]
Leung A O,Luksemburg W J,Wong A S, et al. Spatial distribution of polybrominated diphenyl ethers and polychlorinated dibenzo-p-dioxins and dibenzofurans in soil and combusted residue at Guiyu, an electronic waste recycling site in southeast China[J]. Environ. Sci. Technol., 2007,41(8):2730-2737.
Theo L. Integrated recycling of non-ferrous metals at Boliden Ltd. Ronnskar smelter[J]. IEEE International Symposium on Electronics and the Environment, 1998,42-47.
[19]
Weber R, Kuch B. Relevance of BFRs and thermal conditions on the formation pathways of brominated and brominated-chlorinated dibenzodioxins and dibenzofurans[J]. Environment International, 2003,29(6):699-710.
