RGO电极电催化降解海产养殖废水中盐酸四环素

Electrocatalytic Degradation of Tetracycline Hydrochloride in Marine Aquaculture Wastewater by RGO Electrode

研究通过改进的Hummers法结合水热法制备还原氧化石墨烯(RGO)作为电催化阳极,利用透射电子显微镜(TEM)和X-射线光电子能谱(XPS)对RGO进行表征,以盐酸四环素为目标污染物,对其进行电催化降解实验。研究发现在外加电流为15 mA,温度为20℃,盐酸四环素的浓度为5 mg/L的条件下,30 min内RGO电催化盐酸四环素的降解率可达95.07%。为深入研究电催化去除海产养殖废水中盐酸四环素污染的实际应用可行性,利用循环试验对材料稳定性进行测试,该材料耐盐性与稳定性能良好。通过自由基猝灭和活性氯产生量的实验,发现RGO电催化降解盐酸四环素的主要活性物种为表面产生的活性氯和·OH。

The modified Hummers method combined with hydrothermal method was used to prepare reduced graphene oxide(RGO)as electrocatalytic anode.Transmission electron microscopy(TEM)and X-ray photoelectron spectroscopy(XPS)were used to characterize RGO.Tetracycline hydrochloride was used as the target pollutant to conduct electrocatalytic degradation experiments.It was found that under the conditions of impressed current 15 mA,temperature 20℃and tetracycline hydrochloride concentration 5 mg/L,the degradation rate of tetracycline hydrochloride electrocatalyzed by RGO could reach 95.07%within 30 min.In order to further study the practical feasibility of electrocatalytic removal of tetracycline hydrochloride pollution from Marine aquaculture wastewater,the stability of the material was tested by cycle test,and the salt resistance and stability of the material were good.Through the experiments of radical quenching and reactive chlorine production,it was found that the main active species of RGO electrocatalytic degradation of tetracycline hydrochloride were reactive chlorine and·OH produced on the surface.