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Degradation of brominated flame retardant in computer housing plastic by supercritical fluids
Wang, Yanmin; Zhang, Fu-Shen
2012
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume205Pages:156-163
AbstractThe degradation process of brominated flame retardant (BFR) and BFR-containing waste computer housing plastic in various supercritical fluids (water, methanol, isopropanol and acetone) was investigated. The results showed that the debromination and degradation efficiencies, final products were greatly affected by the solvent type. Among the four tested solvents, isopropanol was the most suitable solvent for the recovery of oil from BFR-containing plastic for its (1) excellent debromination effectiveness (debromination efficiency 95.7%), (2) high oil production (60.0%) and (3) mild temperature and pressure requirements. However, in this case, the removed bromine mostly existed in the oil. Introduction of KOH into the sc-isopropanol could capture almost all the inorganic bromine from the oil thus bromine-free oil could be obtained. Furthermore, KOH could enhance the depolymerization of the plastic. The obtained oil mainly consisted of single- and duplicate-ringed aromatic compounds in a carbon range of C9-C17, which had alkyl substituents or aliphatic bridges, such as butylbenzene, (3-methylbutyl)-benzene, 1,1'-(1,3-propanediyl)bis benzene. Phenol, alkyl phenols and esters were the major oxygen-containing compounds in the oil. This study provides an efficient approach for debromination and simultaneous recovering valuable chemicals from BFR-containing plastic in e-waste. (C) 2011 Elsevier B.V. All rights reserved.
Department环境纳米材料研究室
KeywordHazardous Waste Supercritical Fluid Brominated Flame Retardant Debromination Chemical Recycling
Citation statistics
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/7937
Collection环境纳米技术与健康效应重点实验室
Recommended Citation
GB/T 7714
Wang, Yanmin,Zhang, Fu-Shen. Degradation of brominated flame retardant in computer housing plastic by supercritical fluids[J]. JOURNAL OF HAZARDOUS MATERIALS,2012,205:156-163.
APA Wang, Yanmin,&Zhang, Fu-Shen.(2012).Degradation of brominated flame retardant in computer housing plastic by supercritical fluids.JOURNAL OF HAZARDOUS MATERIALS,205,156-163.
MLA Wang, Yanmin,et al."Degradation of brominated flame retardant in computer housing plastic by supercritical fluids".JOURNAL OF HAZARDOUS MATERIALS 205(2012):156-163.
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