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Tetrabromobisphenol A recovery from computer housing plastic by a new solvothermal process
Authors:Cong-Cong Zhang  Veena Sahajwalla  Fu-Shen Zhang
Institution:1. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing, 100085, China
2. Centre of Sustainable Materials and Research Technology, University of New South Wales, Sydney, NSW, 2052, Australia
Abstract:Brominated flame retardants contained in electrical and electronic waste plastic are toxic to both humans and the environment. Most disposal technologies for brominated flame retardants are environmentally unfriendly. Here, a novel solvothermal process was designed to recover tetrabromobisphenol A, a typical brominated flame retardant, from waste computer housing plastic. The plastic waste was treated by the solvothermal process followed by vacuum rotary evaporation. Results show a tetrabromobisphenol A recovery efficiency of 78.9 %, and a purity of 95.6 %. The stability of tetrabromobisphenol A during the solvothermal process was confirmed by nuclear magnetic resonance. Kinetics showed that diffusion across the polymer layer controlled recovery. We conclude that the novel solvothermal process is a promising green way to recover tetrabromobisphenol A from electrical and electronic waste plastic.
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