Han Meina, Duan Xiaoguang, Cao Guoliang, Zhu Shishu, Ho Shih-Hsin
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province,150090, PR China.
School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia.
Process Saf Environ Prot. 2020 Jul;139:230-240. doi: 10.1016/j.psep.2020.04.046. Epub 2020 May 5.
Landfill leachate poses significant risks to public health via the release of high-toxicity contaminants, including refractory organic compounds, ammonia-nitrogen compounds, and heavy metals. Significant efforts have been made to develop useful methods for leachate disposition and treatment. Advanced oxidation processes (AOPs) are one of the most promising methods, because they can rapidly degrade diverse pollutants and significantly improve the biodegradability of leachate. Graphitic carbon nitride (g-CN), a fascinating conjugated polymer, has become a hot topic in AOP research due to its metal-free benefits and high photosensitivity. Thus, combining AOPs with g-CN achieves excellent degradation of refractory pollutants in leachate. Since the composition of leachate is complex in the practical conditions, the information reported by current studies of using g-CN as a remediator is still incomplete and fragmented. Thus, in this review, the recent status of leachate treatment and approaches for its disposal has been summarized and some conclusions have been drawn. In addition, a brief introduction to g-CN and its application in AOPs for leachate treatment have been critically discussed and with its future outlook assessed. Although the development of g-CN in AOPs for leachate treatment is highly efficient and practical, comprehensive study about its application and technology expansion is urgently needed, based on the complex operating conditions. Perspectives on the treatment of leachate using g-CN-AOPs are also included. The information and perspectives provided in this review will provide guidance and novel understanding to accelerate the development of g-CN-based AOPs for leachate treatment.
垃圾渗滤液通过释放高毒性污染物，包括难降解有机化合物、氨氮化合物和重金属，对公众健康构成重大风险。人们已做出巨大努力来开发有效的垃圾渗滤液处理和处置方法。高级氧化工艺（AOPs）是最有前景的方法之一，因为它们能快速降解各种污染物，并显著提高渗滤液的生物降解性。石墨相氮化碳（g-CN）是一种引人关注的共轭聚合物，由于其无金属特性和高光敏性，已成为AOP研究中的热点话题。因此，将AOPs与g-CN结合可实现对渗滤液中难降解污染物的优异降解。由于实际情况下渗滤液的成分复杂，目前关于使用g-CN作为修复剂的研究报告的信息仍然不完整且零散。因此，在本综述中，总结了渗滤液处理的现状及其处置方法，并得出了一些结论。此外，还对g-CN及其在AOPs处理渗滤液中的应用进行了简要介绍，并对其未来前景进行了评估。尽管g-CN在AOPs处理渗滤液方面的发展高效且实用，但基于复杂的操作条件，迫切需要对其应用和技术扩展进行全面研究。还包括了使用g-CN-AOPs处理渗滤液的展望。本综述提供的信息和展望将为加速基于g-CN的AOPs处理渗滤液的发展提供指导和新的认识。
