Pomelo peel biomass derived highly active advanced-oxidation-process catalyst: Complete elimination of organic pollutants

Using cheap and readily available pomelo peel-flesh biomass as raw material to construct ultra-fine and highly dispersed nano-cobalt biochar material, further realizing the efficient activation of peroxymonosulfate to active oxygen species that can effectively degrade organic pollutants , which provides a low-cost way for the elimination of organic pollutants and the continuous purification of sewage. • A highly dispersed ultrafine nano-Co material was constructed based on pomelo peel-flesh biomass. • Co/BDPPF combined with PMS nearly 100% degradation of tetracycline, and has lasting stability. • Co/BDPPF can efficiently degrade organic pollutants in complex water environments. • The integrated device built by Co/BDPPF can realize the continuous purification of organic sewage. The advanced oxidation process (AOPs) is playing an important role in the elimination of hazardous organic pollutants, but the development of inexpensive and highly active advanced catalysts is facing challenges. In this study, a low-cost and readily available agricultural waste resource pomelo peel-flesh (PPF) biomass was used as the basic raw material, and the uniformly dispersed small cobalt nanoparticles were effectively anchored in the biochar derived from pomelo peel-flesh (BDPPF) by impregnation adsorption/complexation combined with heat treatment. Co/BDPPF (BDPPF embedded with Co) can effectively activate peroxymonosulfate (PMS) to SO 4 ·- , ·OH and 1 O 2 reactive oxygen species, and achieve nearly 100% degradation of tetracycline persistent organic pollutant. Co/BDPPF can not only degrade tetracycline efficiently in complex water environment, but also degrade most organic pollutants universally, and has long-term stability, which solves the problem of poor universality and stability of heterogeneous catalysts to a certain extent. Importantly, Co/BDPPF derived from waste biomass was also innovatively designed as the core of an integrated continuous purification device to achieve continuous purification of organic wastewater. In this study, agricultural waste resources were selected as biomass raw materials to achieve efficient capture of Co 2+ , and finally developed advanced AOPs catalyst with excellent performance to achieve the purification of organic wastewater. It also provides a promising solution for the preparation of simple, low-cost, large-scale production of AOPs catalysts that can be put into actual production.