Heterogeneous Activation of Peroxymonosulfate by CuFe2O4/Al2O3 for Tetracycline Hydrochloride Degradation
Peroxymonosulfate-based advanced oxidation processes has attracted extensive research interest due to its unique advantages in environmental remediation.However,the development of low-cost and high-efficiency catalysts to activate peroxymonosulfate is still a key problem in the degradation of organic pollutants.A magnetic recoverable composite(i.e.,CuFe2O4/Al2O3)was synthesized successfully by a sol-gel method with citric acid,and firstly applied as a heterogeneous catalyst to activate peroxymonosulfate(PMS)to degrade tetracycline hydrochloride(TC·HCl)in water.The crystal structure and phases formation of CuFe2O4/Al2O3 were studied by X-ray diffraction(XRD).The effects of PMS concentration,catalyst dosage and initial solution pH on catalytic activity were investigated in detail,as well as the degradation process in different water substrates containing TC·HCl.The results indicated that approximately 95.1%of TC·HCl was degraded at 10 min in the presence of 0.3 g/L PMS,0.2 g/L CuFe2O4/Al2O3 and pH=4.7.The cycling experiments and magnetic test results showed that CuFe2O4/Al2O3 showed good stability and magnetism.Hence,CuFe2O4/Al2O3 can be used as an efficient heterogeneous catalyst to activate PMS for the treatment wastewater containing TC·HCl.
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