CoFe_(2)O_(4)的制备及活化过氧乙酸降解诺氟沙星  

Preparation of CoFe_(2)O_(4) and degradation of norfloxacin by activated peracetic acid

作　　者：吴阳 刘振中 徐志威 邓兆详 万思文 WU Yang;LIU Zhenzhong;XU Zhiwei;DENG Zhaoxiang;WAN Siwen(School of Civil Engineering and Architecture,Nanchang University,Nanchang 330031,China;School of Resources ,Environmental and Chemical Engineering,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学建筑工程学院,江西南昌330031 [2]南昌大学资源环境与化工学院,江西南昌330031

出　　处：《南昌大学学报（工科版）》2021年第4期367-373,共7页Journal of Nanchang University(Engineering & Technology)

基　　金：2020年南昌大学本科科研训练资助项目。

摘　　要：利用溶胶凝胶结合自蔓延燃烧法,制备出具有良好磁性的CoFe_(2)O_(4)。通过正交实验,探究了硝酸盐与柠檬酸比例、pH值与煅烧温度对制备出的CoFe_(2)O_(4)活化过氧乙酸(PAA)降解诺氟沙星的影响,选出最佳的制备参数。在CoFe_(2)O_(4)最佳制备参数下考察了CoFe_(2)O_(4)投加量、PAA质量浓度、初始pH和水体中干扰物质(HCO_(3)^(-)、Cl^(-)、SO_(4)^(2-)和腐殖酸)对CoFe_(2)O_(4)活化PAA降解诺氟沙星的影响。在pH为7的环境下,CoFe_(2)O_(4)+PAA的氧化体系在35 min内对诺氟沙星的降解率达到70%,相比CoFe_(2)O_(4)和CoFe_(2)O_(4)+H_(2)O_(2)等体系展现出更高效的降解效率。自由基猝灭实验表明有机自由基(R—O·)是CoFe_(2)O_(4)+PAA体系降解诺氟沙星过程中占据主导作用的自由基。CoFe_(2)O_(4)was successfully prepared by sol-gel combined with self-combustion method and showed good magnetic properties.The effects of nitrate salt/citric acid ratio,pH and calcination temperature on the degradation of norfloxacin by peracetic acid activated by CoFe_(2)O_(4)were investigated by orthogonal experiment,and then the best preparation parameters were selected.The effects of CoFe_(2)O_(4)dosage,peracetic acid(PAA)concentration,initial pH and interfering substances(HCO_(3)^(-)、Cl^(-)、SO_(4)^(2-) and humic acid)in water on the degradation of norfloxacin by CoFe_(2)O_(4)activated PAA were investigated under the optimum preparation parameters of CoFe_(2)O_(4).The degradation rate of norfloxacin by the oxidation system of CoFe_(2)O_(4)+PAA reached 70%within 35 min in the pH 7,which showed higher degradation efficiency than CoFe_(2)O_(4)and CoFe_(2)O_(4)+H_(2)O_(2).The experiment of radical quenching showed that organic radical(R—O)was the dominant radical in the degradation of norfloxacin by CoFe_(2)O_(4)+PAA systems.

关 键 词：高级氧化 尖晶石铁氧体 活化 抗生素 过氧乙酸 

分 类 号：X703.1[环境科学与工程—环境工程]