State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKJLESPC), Beijing Key Laboratory for Emerging Organic Contaminants Control (BKLEOCC), Key Laboratory of Solid Waste Management and Environment Safety, School of Environment, POPs Research Center, Tsinghua University, Beijing 100084, China.
State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKJLESPC), Beijing Key Laboratory for Emerging Organic Contaminants Control (BKLEOCC), Key Laboratory of Solid Waste Management and Environment Safety, School of Environment, POPs Research Center, Tsinghua University, Beijing 100084, China; Jinhua Polytechnic, Jinhua 321007, China.
Waste Manag. 2018 May;75:181-186. doi: 10.1016/j.wasman.2018.02.008. Epub 2018 Feb 9.
Chemical recycling technologies are the most promising for a waste-to-energy/material recovery of plastic waste. However, 30% of such waste cannot be treated in this way due to the presence of halogenated organic compounds, which are often utilized as flame retardants. In fact, high quantities of hydrogen halides and dioxin would form. In order to enabling such huge amount of plastic waste as viable feedstock for recycling, an investigation on mechanochemical pre-treatment by high energy ball milling is carried out on polypropylene containing decabromodiphenyl ether. Results demonstrate that co-milling with zero valent iron and quartz sand ensures complete debromination and mineralization of the flame retardant. Furthermore, a comparative experiment demonstrates that the mechanochemical debromination kinetics is roughly proportional to the polymer-to-haloorganics mass ratio.
化学回收技术是最有前途的塑料废物能源/材料回收方法。然而，由于存在卤代有机化合物，其中许多被用作阻燃剂，因此 30%的此类废物不能以这种方式处理。实际上，会形成大量的氢卤酸和二恶英。为了使如此大量的塑料废物成为可行的回收原料，对含有十溴二苯醚的聚丙烯进行了高能球磨的机械化学预处理研究。结果表明，与零价铁和石英砂共磨可确保阻燃剂完全脱溴和矿化。此外，对比实验表明，机械化学脱溴动力学与聚合物-卤代有机物的质量比大致成正比。
