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Hot topic: thermal treatment of per- and polyfluoroalkyl substances
Current Opinion in Chemical Engineering ( IF 6.6 ) Pub Date : 2023-10-27 , DOI: 10.1016/j.coche.2023.100976
David Zgonc , Pia Ramos , Yifan Gao , Eric M V Hoek , Jens Blotevogel , Anthony K Rappé , Shaily Mahendra

Per- and polyfluoroalkyl substances’ (PFAS) unique chemical properties define modern expectations of synthetic chemistry for diverse consumer products and industrial applications. That same chemistry becomes problematic at the end of PFAS-containing material life cycles. Safe disposal of PFAS is important to mitigate adverse human health and ecotoxicological effects. Thermal treatment is reported to be effective in defluorinating and mineralizing many PFAS. However, thermal technologies are energy-intensive and have the potential to create harmful by-products, including fluorinated products of incomplete combustion. In this work, we critically review recent advances in thermal treatment, focusing on mature technologies such as combustion and pyrolysis plus other promising options such as alkaline hydrothermal processes, sonolysis, and supercritical water oxidation. Furthermore, we propose that thermal treatment not be used as a sole method for PFAS destruction but as a treatment train component following the separation and concentration of PFAS from impacted environmental media.

中文翻译:

热门话题:全氟烷基和多氟烷基物质的热处理

全氟烷基物质和多氟烷基物质 (PFAS) 独特的化学性质定义了对各种消费品和工业应用的合成化学的现代期望。在含 PFAS 的材料生命周期结束时,同样的化学反应也会出现问题。安全处置 PFAS 对于减轻对人类健康和生态毒理学的不利影响非常重要。据报道,热处理对于许多 PFAS 的脱氟和矿化是有效的。然而,热技术是能源密集型的,并且有可能产生有害的副产品,包括不完全燃烧的氟化产物。在这项工作中,我们批判性地回顾了热处理的最新进展,重点关注燃烧和热解等成熟技术以及碱性水热工艺、超声分解和超临界水氧化等其他有前景的技术。此外,我们建议热处理不应作为 PFAS 销毁的唯一方法,而应作为从受影响的环境介质中分离和浓缩 PFAS 后的处理系列组成部分。
更新日期:2023-10-27
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