磁性生物炭的制备及其活化过一硫酸盐的研究进展

Research progress on preparation and peroxymonosulfate activation of magnetic biochar

硫酸根自由基高级氧化技术因其具有高效、快速降解污染物的特点,近年来在水体中新兴有机污染物去除方面受到广泛关注.同时,磁性生物炭凭借其比表面积大、富含官能团和可磁性分离的特性有望成为应用于过一硫酸盐(PMS)活化的新生催化剂.本文综述了磁性生物炭复合材料常用的制备方法及其在形貌、比表面积和官能团方面的理化性质,着重介绍了磁性生物炭在活化PMS降解有机污染物方面的应用,探讨了磁性生物炭活化PMS的自由基和非自由基机理.最后,对磁性生物炭活化PMS遇到的问题及发展趋势进行了探讨.

In recent years,utilizing sulfate radical-based advanced oxidation processes to remove emerging organic pollutants in water has received widespread attention due to their high degradation efficiency toward pollutants.Meanwhile,magnetic biochar has been emerged as promising catalysts to activate peroxymonosulfate(PMS)because of its large surface area,abundant functional groups and good recyclable feature.The preparation methods and physicochemical properties(including morphology,specific surface area and functional group)of magnetic biochar were introduced in this study.Moreover,the applications of magnetic biochar for PMS activation were investigated in detail.The mechanisms including radicals and non-radical pathway were also discussed.Finally,the problems and development trend of magnetic biochar for PMS activation in the field of environmental catalysis were pointed out.