Boron promoted Fe^(3+)/peracetic acid process for sulfamethazine degradation:Efficiency,role of boron,and identification of the reactive species  

作　　者：Yanhong Zhang Guangbing Liu Yuzhu Xue Lichun Fu Yawei Qian Minhui Hou Xiang Li Chen Ling Ying Zhang Yuwei Pan 

机构地区：[1]Jiangsu Provincial Key Laboratory of Environmental Engineering,Jiangsu Provincial Academy of Environmental Science,Nanjing 210036,China [2]College of Biology and the Environment,Nanjing Forestry University,Nanjing 210037,China [3]School of Iron and Steel,Soochow University,Suzhou 215000,China [4]School of the Environment,Nanjing University,Nanjing 210023,China [5]SUMEC Complete Equipment&Engineering Co.,LTD.,Nanjing 211500,China [6]Key Laboratory of Pollution Process and Environmental Criteria,Ministry of Education,College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China [7]School of Environment,Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control,Ministry of Education,Henan Key Laboratory for Environmental Pollution Control,Henan Normal University,Xinxiang 453007,China

出　　处：《Journal of Environmental Sciences》2024年第1期72-85,共14页环境科学学报（英文版）

基　　金：supported by the Natural Science Foundation of Jiangsu Province in China (No.BK20210952);the Jiangsu Provincial Key Laboratory of Environmental Engineering (No.ZX2022002);the National Natural Science Foundation of China (Nos.52200095,22176102,and 21806081);the China Postdoctoral Science Foundation Project (No.2020M681552);the Natural Science Foundation of Tianjin (No.19JCQNJC07900)。

摘　　要：In this work,boron(B)was used to promote Fe^(3+)/peracetic acid(Fe^(3+)/PAA)for the degradation of sulfamethazine(SMT).An SMT degradation efficiency of 9.1%was observed in the Fe^(3+)/PAA system over 60 min,which was significantly increased to 99.3%in the B/Fe^(3+)/PAA system over 10 min.The B/Fe^(3+)/PAA process also exhibited superior resistance to natural substances,excellent adaptability to different harmful substances,and good removal of antibiotics in natural fresh water samples.The mechanism of action of boron for Fe^(3+)reduction was determined using scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),Fourier transform infrared(FT-IR)spectroscopy,density functional theory(DFT)calculations,and electrochemical tests.The dominant role of^(·)OH was confirmed using quenching experiments,electron spin resonance(EPR)spectroscopy,and quantitative tests.Organic radicals(R-O^(·))and Fe(IV)also significantly contribute to the removal of SMT.DFT calculations on the reaction between Fe^(2+)and the PAA were conducted to further determine the contribution from ^(·)OH,R-O^(·),and Fe(IV)from the perspective of thermodynamics and the reaction pathways.Different boron dosages,Fe^(3+)dosages,and initial pH values were also investigated in the B/Fe^(3+)/PAA system to study their effect of SMT removal and the production of the reactive species.Fe(IV)production determined the k_(R-O·+Fe(IV))value suggesting that Fe(IV)may play a more important role than R-O^(·).A comparison of the results with other processes has also proved that the procedure described in this study(B/Fe^(3+)/PAA)is an effective method for the degradation of antibiotics.

关 键 词：BORON Peracetic acid SULFAMETHAZINE DFT Reactive species 

分 类 号：X703[环境科学与工程—环境工程]