摘要
采用赤泥基ZnFe_(2)O_(4)催化剂光催化降解四环素,评价了赤泥基ZnFe_(2)O_(4)催化剂的催化活性和稳定性,考察了催化剂用量、HO浓度、pH值、反应时间等因素对光催化降解四环素的影响,提出了催化剂在光催化反应条件的机理。实验结果表明,赤泥基ZnFe_(2)O_(4)催化剂具有催化活性,循环使用4次后四环素降解率仍保持53%左右,Fe溶出量均未超过0.15mg·L^(-1);在最优工艺条件:催化剂用量0.5g·L^(-1)、HO浓度20mmol·L^(-1)、pH值为9、反应时间5h下,四环素降解率达到86.3%;在赤泥基ZnFe_(2)O_(4)催化剂光催化降解四环素的过程中,超氧自由基(·O_(2)^(-))和空穴(h^(+))起到主要的氧化作用。
A red mud based ZnFe_(2)O_(4)catalyst was used for photocatalytic degradation of tetracycline.The catalytic activity and stability of the red mud based ZnFe_(2)O_(4)catalyst were evaluated.The effects of catalyst dosage,HOconcentration,pH,reaction time and other factors on the photocatalytic degradation of tetracycline were investigated.The experimental results showed that the red mud based ZnFe_(2)O_(4)catalyst has catalytic activity,and the degradation rate of tetracycline remains about 53%after 4 cycles,and the iron ion dissolution rate is not more than 0.15mg·L^(-1).Under the optimal conditions of catalyst dosage 0.5g·L^(-1),HOconcentration 20mmol·L^(-1),pH 9 and reaction time 5h,the degradation rate of tetracycline can reach 86.3%.In the photocatalytic degradation of tetracy-cline with red mud ZnFe_(2)O_(4)catalyst,superoxide radical(·O_(2)^(-))and hole(h^(+))play the main role of oxidation.
作者
李瑞华
刘璐
LI Rui-hua;LIU Lu(Cucde Environmental Technology Co.,Ltd.,Beijing 100120,China;School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China)
出处
《化学工程师》
CAS
2022年第11期42-46,共5页
Chemical Engineer
基金
广西自然科学基金项目(2021GXNSFAA075006)。
