Due to public concern about tetracycline (TC), it is imperative to eliminate this compound from the environment. This article describes the preparation of an efficient and low-cost porous copper alginate/graphene oxide (CA/GO) composite material by freeze-drying. The application of tetracycline removal in the presence of persulfate (PS) was studied. The effects of pH, PS, catalyst dosage and tetracycline concentration on adsorption and degradation were investigated. The synthesized composites were characterized by Scanning electron microscope (SEM), Fourier Transform infrared spectroscopy (FTIR) and Thermogravimetric analysis (TGA). The degradation rate of tetracycline increases with the increase of the compound dose, and decreases with the increase of the initial pH. The adsorption of tetracycline by this catalyst is suitable for Langmuir model. Under the optimum conditions, the removal efficiency of tetracycline was up to 98%. The high reactivity of the composite material is closely related to its redox ability. At the same time, the reusability of the material was studied. After being recycled four times under the same conditions, the removal rate of tetracycline reached about 85%.

由于公众对四环素（TC）的关注，必须从环境中消除这种化合物。本文介绍了通过冷冻干燥制备高效且低成本的多孔藻酸铜/氧化石墨烯（CA / GO）复合材料的方法。研究了过硫酸盐（PS）存在下四环素去除的应用。研究了pH，PS，催化剂用量和四环素浓度对吸附和降解的影响。通过扫描电子显微镜（SEM），傅立叶变换红外光谱（FTIR）和热重分析（TGA）对合成的复合材料进行表征。四环素的降解率随化合物剂量的增加而增加，随初始pH值的增加而降低。该催化剂对四环素的吸附适合于Langmuir模型。在最佳条件下，四环素的去除率可达98％。复合材料的高反应性与其氧化还原能力密切相关。同时，研究了材料的可重用性。在相同条件下回收四次后，四环素的去除率达到约85％。