文献类型：期刊文献

英文题名：Ascorbic acid promoted sulfamethoxazole degradation in MIL-88B(Fe)/H2O2 Fenton-like system

作者：Han, Xiaolin[1,2];Wang, Nannan[1,2];Zhang, Wei[1,2,3];Liu, Xiaodong[1,2];Yu, Qi[1,2];Lei, Juying[1,2,3];Zhou, Lei[1,2,3];Xiu, Guangli[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Environm Protect Key Lab Environm Stand &, Shanghai 200237, Peoples R China;[3]Tongji Univ, Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2023

卷号：11

期号：1

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20225313320655);WOS:【SCI-EXPANDED(收录号:WOS:000998403100001)】；

基金：This work was supported by the Natural Science Foundation of Shanghai (No. 17ZR1407000) , the National Natural Science Foundation of China (No. 41201302) , and the Fundamental Research Funds for the Central Universities (No. 222201514337) .

语种：英文

外文关键词：Sulfamethoxazole; Iron-based metal-organic framework; Heterogeneous Fenton-like catalysis; Ascorbic acid; Fe(III); Fe(II) cycle

摘要：In this work, the presence of ascorbic acid (AsA) in MIL-88B(Fe)/H2O2 system was demonstrated to significantly increase the sulfamethoxazole (SMX) degradation efficiency. The SMX degradation rate in AsA/MIL-88B(Fe)/ H2O2 system was 0.177 L/(mg center dot min), which was 60 times that of the MIL-88B(Fe)/H2O2 system. Moreover, the study shows that AsA not only promotes SMX degradation in Fenton-like systems but also expands its pH application range. The effect of coexisting anions on the catalytic performance of the AsA/MIL-88B(Fe)/H2O2 system was also investigated. Then, reactive species were detected via quenching experiments, which indicated center dot OH as the dominant free radical contributing to SMX degradation. Meanwhile, ESR determinations confirmed the existence of center dot OH and O2 -center dot in AsA/MIL-88B(Fe)/H2O2 system. The high activity of the AsA/MIL-88B(Fe)/ H2O2 system was attributed to the effective surface Fe(III)/Fe(II) cycle promoted by AsA, and a possible mechanism of the AsA/MIL-88B(Fe)/H2O2 system is proposed. The possible pathways for SMX and AsA degra-dation in the AsA/MIL-88B(Fe)/H2O2 system are proposed based on the identified intermediates and the eco-toxicity analysis was conducted by ECOSAR. Finally, experimental results using the actual surface water and groundwater revealed the excellent availability of AsA/MIL-88B(Fe)/H2O2 system in remediating SMX contaminated water. This study presents a novel, efficient Fenton-like system using AsA and iron-based metal -organic frameworks for sulfonamide removal from water.