铁基生物炭活化过硫酸盐处理有机废水的研究进展

Research progress on the treatment of organic wastewater by iron-based biochar activated persulfate

环境中富集的各种有机污染物对生态系统和人体健康存在较大威胁。近年来,基于过硫酸盐(PS)的高级氧化技术(AOPs)因操作简单、成本较低且氧化还原能力强,在高效降解有机污染物方面展现出巨大潜力。铁基生物炭(Fe-biochar)由于具有吸附和催化的双重优势,在活化PS降解有机污染物领域得到了广泛应用。简述了Febiochar复合材料的制备方法,介绍了Fe-biochar活化PS过程的影响因素,分析了污染物降解过程中存在的反应机制。Fe-biochar不仅可以通过吸附作用去除污染物,还可以通过高效的电子转移来介导Fe-biochar/PS体系中自由基途径和非自由基途径对污染物进行降解。同时,对Fe-biochar的重复利用性和稳定性进行了讨论,提出了几种Fe-biochar高效再生的方法。最后对Fe-biochar用于活化PS降解有机污染物的实际应用进行了展望,以期为难降解有机污染物处理及生物质高值化利用提供参考。

Various organic pollutants in the environment pose a great threat to ecosystem and human health.In re-cent years,advanced oxidation processes(AOPs)based on persulfate(PS)have shown great potential in the effi-cient removal of organic pollutants due to simple operation,low cost and high redox efficiency.Iron-based biochar(Fe-biochar),which has the dual advantages of adsorption and catalysis,has been widely used in the field of acti-vating PS to degrade organic pollutants.The preparation method of Fe-biochar was summarized firstly.Various in-fluencing factors in the Fe-biochar/PS process were introduced.The catalytic mechanism in the Fe-biochar/PS pro-cess was described on the point of adsorption,radical pathway,and non-radical pathway.In addition,the stability and reusability of Fe-biochar catalyst were discussed,and two efficient regeneration methods were put forward.Fi-nally,the practical application of Fe-biochar as the catalyst for activating PS was prospected.It hopes to provide ref-erence for degradation of refractory organic pollutants and high-valued utilization of biomass.