Catalytic degradation of lomefloxacin by photo-assisted persulfate activation on natural hematite:Performance and mechanism  

作　　者：Ruonan Guo Ying Chen Bingrui Liu Ying Han Jianfeng Gou Xiuwen Cheng 

机构地区：[1]Key Laboratory for Environmental Pollution Prediction and Control,Gansu Province,College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China

出　　处：《Chinese Chemical Letters》2022年第8期3809-3817,共9页中国化学快报（英文版）

基　　金：kindly funded by National Natural Science Foundation of China(No.51978319);Outstanding Youth Foundation of Gansu Province(No.20JR10RA651);Natural Science Foundation of Gansu Province(No.20JR10RA635)。

摘　　要：The natural hematite(α-Fe_(2)O_(3)) is stable and abundant on the earth,as well as with strange electronic band structure and good visible light absorption properties.However,the composition and catalytic performance of natural hematite should be explored.In this study,the photo-assisted hematite nanoparticles activated persulfate(H-NPs/PS/vis)system was constructed.As detected,H-NPs had an irregular agglomerate structure with abundant internal pore and were mainly composed of Fe_(2)O_(3),SiO_(2) and TiO_(2).The system was applied to removing various antibiotic(i.e.,lomefloxacin,ciprofloxacin and enrofloxacin with initial concentration of 10 mg/L),achieving high degradation performance of 82.0%,81.2%and 82.2%after120,330 and 240 min,respectively.Moreover,H-NPs had excellent reusability with low metal leaching(Ti leaching percentage lower than 0.01%,Fe dissolution percentage was 0.48%)and stable structure.At last,a possible reaction mechanism of H-NPs/PS/vis system was proposed that lomefloxacin(LOM)was efficiently removed via the synergistic process of components contained in H-NPs with PS and light,involving the generation of·O_(2)^(-),·OH and SO_(4)^(·-).Above all,this paper provided a novel application scheme of natural hematite through in-depth and comprehensive experimental exploration.

关 键 词：Natural hematite PERSULFATE PHOTOCATALYTIC Antibiotic degradation 

分 类 号：O643.36[理学—物理化学] X703[理学—化学]