CuO@C催化过二硫酸盐降解盐酸四环素研究

Study on Degradation of Tetracycline Hydrochloride by CuO@C Catalyzed Persulfate

采用溶剂热法制备了含铜金属有机骨架材料(Cu-MOFs),并进一步碳化得到了CuO@C催化剂。研究了CuO@C催化过二硫酸盐(PS)降解盐酸四环素的效能,考察了CuO@C投加量、PS投加量、盐酸四环素初始浓度及反应溶液初始pH对PS/CuO@C体系降解盐酸四环素效果的影响。结果表明,当CuO@C投加量、PS投加量、盐酸四环素浓度分别为0.150 g/L、1.00 mmol/L、20μmol/L时,盐酸四环素的去除率可以达到90%。在一定范围内,催化剂和PS投加量增加、盐酸四环素含量降低以及碱性环境更有利于PS-CuO@C体系中盐酸四环素的降解。通过投加叔丁醇和乙醇2种猝灭剂,证实了盐酸四环素的降解主要由SO_4^(·-)及其转化的HO·共同作用的结果。

Cu-metal organic frameworks(Cu-MOFs)was prepared via hydrothermal method,and CuO@C catalyst was obtained by further carbonization.The tetracycline hydrochloride degradation efficiency by CuO@C catalyzed persulfate(PS)was studied,the effect of CuO@C dosage,PS dosage,tetracycline hydrochloride initial concentration,and initial pH on removal efficiency of tetracycline hydrochloride by PS/CuO@C system was investigated.The results indicated that the tetracycline hydrochloride degradation reached 90% when CuO@C dosage,PS dosage and tetracycline hydrochloride initial concentration was 0.150 g/L,1.00 mmol/L and 20 μmol/L respectively.Increased CuO@C and PS dosage and decreased tetracycline hydrochloride content within limits,and alkaline condition was favored for tetracycline hydrochloride by PS/CuO@C system.By adding different radical scavengers of ethanol(EtOH)and Tert-butyl alcohol identified that sulfate radical(SO4·-)and its transformed hydroxyl radical(HO·)led to the degradation of tetracycline hydrochloride.