Mn/炭黑-泡沫镍电极电化学降解诺氟沙星  

Electrochemical treatment of norfloxacin withMn/carbon black-nickel foam electrodes

作　　者：李阳 陈琳 黄心睿 文志潘 明银安 王营茹 LI Yang;CHEN Lin;HUANG Xinrui;WEN Zhipan;MING Yinan;WANG Yingru(School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Wuhan 430205,China;State Key Laboratory of New Textile Materials and Advanced Processing Technology,Wuhan Textile University,Wuhan 430200,China)

机构地区：[1]武汉工程大学化学与环境工程学院,湖北武汉430205 [2]武汉纺织大学纺织新材料与先进加工技术国家重点实验室,湖北武汉430200

出　　处：《能源环境保护》2024年第1期134-142,共9页Energy Environmental Protection

基　　金：国家自然科学基金资助项目(52170170);武汉工程大学第十四届研究生教育创新基金资助项目(CX2022434)。

摘　　要：电化学法降解水中有机污染物具有低碳、高效等特点。本文采用共沉淀法制备Mn/炭黑-泡沫镍电极,通过场发射扫描电镜(FESEM)、X射线光电子能谱(XPS)对电极进行了表征,考察了外加电压、极板间距、电解质浓度和诺氟沙星初始浓度对其降解效果的影响。结果表明,Mn/炭黑-泡沫镍电极可促进·OH的产生,强化电芬顿效果。钛钌-Mn/炭黑-泡沫镍电极在外加电压6 V,极板间距15 mm,电解质浓度20 mmol/L,诺氟沙星初始浓度10 mg/L条件下,诺氟沙星去除率可达83.9%,TOC去除率69.2%,能耗为9.6 kW·h/m^(3)。对比钛钌-泡沫镍电极,在相同条件下,Mn/炭黑-泡沫镍电极的诺氟沙星去除率提高了15.8%,能耗降低了0.6 kW·h/m^(3),并且电流效率提高,反应速率明显加快,表明该电极对抗生素类污染物降解具有较好的催化作用。Electrochemical degradation is a promising method for removing organic pollutants from water due to its low carbon footprint and high efficiency.In this study,we prepared Mn/carbon black-nickel foam electrodes using a co-precipitation method and characterized them using FESEM and X-ray photoelectron spectroscopy.We investigated the effects of applied voltage,plate spacing,electrolyte concentration,and initial norfloxacin concentration on the degradation of organic pollutants.The results indicated that Mn/carbon black-nickel foam electrodes exhibited excellent performance in promoting the generation of hydroxyl radicals(·OH)and enhancing the electro-Fenton effect.At optimal conditions,including an applied voltage of 6 V,plate spacing of 15 mm,electrolyte concentration of 20 mmol/L,and initial norfloxacin concentration of 10 mg/L,the norfloxacin removal percentage reached 83.9%.Additionally,the total organic carbon(TOC)removal percentage was 69.2%,and the energy consumption was 9.6 kW·h/m^(3).Furthermore,when compared to titanium ruthenium-nickel foam electrodes under the same conditions,the Mn/carbon black-nickel foam electrode exhibited a 15.8%increase in norfloxacin removal rate,a reduction of 0.6 kW·h/m^(3) in energy consumption,improved current efficiency,and significantly accelerated reaction rates.Overall,this study demonstrates the excellent catalytic effect of the Mn/carbon black-nickel foam electrode on the degradation of antibiotic pollutants.

关 键 词：电化学降解 有机污染物 Mn/炭黑-泡沫镍电极 诺氟沙星 

分 类 号：X703[环境科学与工程—环境工程]