Guo Zijing, Zhang Yang, Jia Hui, Guo Jiaran, Meng Xia, Wang Jie
State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China; State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, China.
State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, China; School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China.
Sci Total Environ. 2022 Feb 1;806(Pt 2):150529. doi: 10.1016/j.scitotenv.2021.150529. Epub 2021 Sep 25.
Landfill leachate is a kind of difficult-to-degrade wastewater with complex water qualities. Waste filtrate cannot be thoroughly treated by traditional biological, physical and chemical methods. In the past five years, electrochemical methods have attracted widespread attention in the treatment of landfill leachate. The article pointed out that for the colloidal/suspended particles in the landfill leachate, using of electrocoagulation can achieve a good treatment effect. Aiming at the characteristics of the dissolved organic matter in the landfill leachate and the high concentration of chloride ions, a more efficient removal can be available by using of electrooxidation. In this review, the latest achievements and basic principles of electrocoagulation and electrooxidation have been introduced. Meanwhile, the influence of different process parameters on these two electrochemical methods was summarized. It also reviewed the effect of electrochemical technology as an independent system or combined with biological and physical chemical processes on the treatment of landfill leachate, as well as the cost of various laboratory scales. Finally, several main problems and challenges encountered by electrochemical methods were briefly discussed, and the prospects for new development and future research were also provided.
垃圾渗滤液是一种水质复杂、难以降解的废水。传统的生物、物理和化学方法无法对垃圾渗滤液进行彻底处理。在过去五年中，电化学方法在垃圾渗滤液处理方面受到了广泛关注。文章指出，对于垃圾渗滤液中的胶体/悬浮颗粒，采用电凝聚法可取得良好的处理效果。针对垃圾渗滤液中溶解有机物的特性以及高浓度氯离子的情况，采用电氧化法可实现更高效的去除。在这篇综述中，介绍了电凝聚和电氧化的最新成果及基本原理。同时，总结了不同工艺参数对这两种电化学方法的影响。还综述了电化学技术作为独立系统或与生物及物理化学工艺相结合对垃圾渗滤液处理的效果，以及各种实验室规模下的成本。最后，简要讨论了电化学方法遇到的几个主要问题和挑战，并给出了新发展和未来研究的前景。
