Cobalt-loaded carbon nanotubes boosted aerobic ciprofloxacin transformation driven by sulfide:A comprehensive mechanism investigation  

作　　者：Han-Qing Zhao Peili Lu Fei Chen Chen-Xuan Li Rui Yan Yang Mu 

机构地区：[1]State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China [2]CAS Key Laboratory of Urban Pollutant Conversion,Department of Environmental Science and Engineering,University of Science and Technology of China,Hefei 230026,China [3]Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment,College of Environment and Ecology,Chongqing University,Chongqing 400045,China [4]College of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230009,China

出　　处：《Chinese Chemical Letters》2024年第3期127-134,共8页中国化学快报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.52200186,U19A20108,52025101 and 52070025);China Postdoctoral Science Foundation(No.2021M693720);Chongqing Municipal Education Commission(No.KJCX2020001)for financially supporting this study。

摘　　要：Sulfide oxidation under aerobic conditions can produce active oxygen for the transformation of organic pollutants in aquatic environments.However,the catalytic performance of transition metal-supported carbon material on this process is poor understood.This study found that Co-loaded carbon nanotubes(CNTs)was able to realize the efficient aerobic transformation of antibiotic ciprofloxacin(CIP)by sulfide,with the pseudo-first order reaction rate constant improved from 0.013 h^(-1)without catalyst to 0.44–0.71 h^(-1)with 100 mg/L Co-loaded CNTs.Singlet oxygen(^(1)O_(2))was the main active specie playing key roles in the process of CIP aerobic transformation with presence of Co-loaded CNTs.Mechanism studies indicated that the excellent electron transfer ability of Co-loaded CNTs might play an important role to promote the electron transfer and facilitate the formation of intermediate H_(2)O_(2)and^(1)O_(2).Additionally,the Co-loaded CNTs/sulfide system effectively reduced the acute toxicity of organic pollutant,and Co-loaded CNTs showed remarkable cycling stability and negligible leaching.This study gives a better understanding for the Co-loaded CNTs mediated aerobic antibiotics transformation by sulfide,and provide a reference for the application of Co-loaded carbon materials on organics aerobic transformation by sulfide.

关 键 词：CIPROFLOXACIN Aerobic transformation Co-loaded carbon nanotubes SULFIDE Singlet oxygen 

分 类 号：X703[环境科学与工程—环境工程] TB383.1[一般工业技术—材料科学与工程]