School of Environmental Science and Engineering/Tianjin Engineering Research Center of Bio Gas/Oil Technology, Tianjin University, Tianjin 300072, China; Georgia Tech Shenzhen Institute, Tianjin University, Shenzhen 518071, China.
Tianjin International Engineering Institute, Tianjin University, Tianjin 300072, China.
J Hazard Mater. 2021 Sep 15;418:126355. doi: 10.1016/j.jhazmat.2021.126355. Epub 2021 Jun 8.
Landfill leachate is produced from garbage decomposition with highly toxic and bio-refractory compounds, which poses serious harm to environmental security and human health. Thus, it is urgent to treat landfill leachate properly. Persulfate (PS) oxidation has attracted extensive attentions in terms of fast reaction speed, non-selectivity to target pollutants and thorough oxidation. In recent years, PS oxidation has been widely adopted for landfill leachate purification. However, the related results have been rarely summarized. In this review, the treatment of landfill leachate by PS oxidation system is discussed systematically including oxidants, activation modes and oxidation mechanisms. In addition, the current situation of PS oxidation system and other coupled systems for landfill leachate treatment is also summarized. Finally, the challenges and future research directions of landfill leachate treatment based on PS oxidation process are proposed. Meaningfully, this review will provide valuable references for the development of landfill leachate treatment process, promoting the application of advanced oxidation technology in landfill leachate treatment.
垃圾填埋场渗滤液是由垃圾分解产生的，其中含有高毒性和生物难降解的化合物，对环境安全和人类健康构成严重威胁。因此，迫切需要对垃圾填埋场渗滤液进行妥善处理。过硫酸盐（PS）氧化因其反应速度快、对目标污染物无选择性和彻底氧化等优点而受到广泛关注。近年来，PS 氧化已广泛应用于垃圾填埋场渗滤液的净化处理。然而，相关研究结果却很少被总结。本综述系统地讨论了 PS 氧化体系处理垃圾填埋场渗滤液的方法，包括氧化剂、活化方式和氧化机制。此外，还总结了 PS 氧化体系及其他耦合体系处理垃圾填埋场渗滤液的现状。最后，提出了基于 PS 氧化过程处理垃圾填埋场渗滤液所面临的挑战和未来研究方向。本综述具有重要意义，可为垃圾填埋场渗滤液处理工艺的发展提供有价值的参考，推动高级氧化技术在垃圾填埋场渗滤液处理中的应用。
