摘要
将自制铁酸钴(CoFe_(2)O_(4))颗粒投入含过二硫酸盐(PDS)的溶液中,构建PDS/CoFe_(2)O_(4)催化氧化体系,处理四环素(TCH)有机废水。X射线衍射(XRD)和傅里叶红外光谱(FT-IR)表征结果显示成功制备出CoFe_(2)O_(4)颗粒。在PDS/CoFe_(2)O_(4)/TCH体系中,重点考察了PDS投加量、CoFe_(2)O_(4)投加量、TCH初始浓度和初始pH等因素对CoFe_(2)O_(4)活化过硫酸盐催化氧化水中四环素的影响,以及自制CoFe_(2)O_(4)颗粒的重复利用性。实验结果表明:四环素的去除率与PDS和CoFe_(2)O_(4)的投加量呈正相关,与TCH初始浓度呈负相关;酸性条件有利于TCH的去除,中性和碱性条件下TCH的去除率略有下降;自制CoFe_(2)O_(4)颗粒在活化过硫酸盐体系中重复利用10次后,对TCH仍表现出很好的去除效果,说明自制CoFe_(2)O_(4)颗粒具有较高且持续稳定的催化活性。CoFe_(2)O_(4)颗粒活化PDS催化氧化去除TCH有机废水的体系以非均相催化反应为主。此外,将CoFe_(2)O_(4)催化剂应用于自制的连续流管式反应器中,利用CoFe_(2)O_(4)颗粒自身磁性可实现催化剂的快速固定化。水力停留时间为31 min时,25 mg/L四环素废水的去除率稳定在90%以上。
Cobalt ferrate(CoFe_(2)O_(4))particles were added into solution containing peroxodisulfate(PDS)to con⁃struct a PDS/CoFe_(2)O_(4)catalytic oxidation system,for treating tetracycline(TCH)organic wastewater.X-ray diffrac⁃tion(XRD)and Fourier infrared spectroscopy(FT-IR)results showed the successful preparation of CoFe_(2)O_(4)par⁃ticles.In the PDS/CoFe_(2)O_(4)/TCH system,the effects of PDS dosage,CoFe_(2)O_(4)dosage,initial concentration of TCH and initial pH on the catalytic oxidation of TCH by CoFe_(2)O_(4)-activated persulfate and the reusability of the CoFe_(2)O_(4)particles were focused on.The experimental results showed that the removal rate of TCH was positively correlated with the dosage of PDS and CoFe_(2)O_(4),and negatively correlated with the initial concentration of TCH.Acidic condi⁃tions favored the removal of TCH,and the removal rate of TCH slightly decreased under neutral and alkaline condi⁃tions.The CoFe_(2)O_(4)particles showed good removal effect on TCH after 10 times of reuse in the PDS/CoFe_(2)O_(4)system,indicating that the CoFe_(2)O_(4)have high stability and continuous catalytic activity.CoFe_(2)O_(4)activated persulfate oxida⁃tion of TCH was mainly a heterogeneous reaction.In addition,the CoFe_(2)O_(4)catalyst was applied to continuous flow tubular reactor,and the catalyst could be immobilized rapidly by using CoFe_(2)O_(4)particles’magnetism.The removal rate of 25 mg/L TCH wastewater was above 90%at a hydraulic retention time of 31 min.
作者
刘佳露
朱彧
刘兆煐
胡苧尹
肖调兵
LIU Jialu;ZHU Yu;LIU Zhaoying;HU Ningyin;XIAO Diaobing(China Nuclear Power Operation Technology Corporation,Co.,Ltd.,Wuhan 430223,China;Key Laboratory of Groundwater Resources and Environment,Ministry of Education,Jilin University,Changchun 130021,China;Jilin Environmental Emergency Command Center,Changchun 130000,China;Changchun Ecological Environment Monitoring Center,Changchun 130000,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2023年第4期139-143,共5页
Industrial Water Treatment
