四环素作为抗生素类药物的一种，在畜牧业、水产养殖以及医疗行业等领域中广泛使用。由于我国对抗生素的使用并未做出明确的规定，这类药物的滥用现象十分严重，这也就间接导致了大量抗生素药物流入到环境中。且这类物质在自然环境中不能由微生物自行降解，对环境造成了极大污染，已引起国内外的广泛关注。降解四环素的方法可以分为生物降解方法和化学降解方法，而在化学降解方法中，高级氧化技术(AOPs)被广泛应用于四环素降解研究。过硫酸钠是一种可以产生硫酸根自由基这种具有强氧化性物质的盐类，但是由于其在水中存在稳定，需要通过一些技术手段对过硫酸钠进行活化，常用的活化方法包括热活化和紫外活化，但是由于这两种方法经济成本较高，能耗较大，未被广泛使用。在实际降解过程中，通常采用过渡金属离子活化方法达到活化的目的，这种方法具有适用 pH 范围广、经济成本低、不产生二次污染以及降解效率高的优点，经常被用于处理抗生素类污染物。本文选取五种过渡金属离子，分别为 Co2+、Ni2+、Mn2+、Zn2+、Cu2+，对过硫酸钠进行活化，采用紫外-可见吸收光谱分析活化效率最高的过渡金属离子，分别对比 100μM、50μM、25μM 和 12.5μM 浓度下对过硫酸钠的活化效果，发现 25μM 的 Cu2+对过硫酸钠的活化效果最好，可以有效促进四环素的氧化降解，为提高四环素降解效率提供理论参考。

Tetracycline, as a type of antibiotic drug, is widely used in fields such as animal husbandry, aquaculture, and medical industry. Due to the lack of clear regulations on the use of antibiotics in China, the abuse of such drugs is very serious, which indirectly leads to a large amount of antibiotic drugs flowing into the environment. And this type of substance cannot be degraded by microorganisms in the natural environment, causing great pollution to the environment and has attracted widespread attention both domestically and internationally. The methods of tetracycline degradation can be divided into biological degradation methods and chemical degradation methods. Among chemical degradation methods, Advanced oxidation process (AOPs) is widely used in tetracycline degradation research. Sodium persulfate is a salt that can produce sulfate radicals, a highly oxidizing substance. However, due to its stability in water, it needs to be activated through some technical means. Common activation methods include thermal activation and ultraviolet activation. However, due to their high economic cost and high energy consumption, these two methods have not been widely used. In the actual degradation process, transition metal ion activation method is usually used to achieve the activation purpose. This method is suitable for a wide pH range, and has the advantages of low economic cost, no secondary pollution, and high degradation efficiency. It is often used to treat antibiotic pollutants. This article selects five transition metal ions, namely Co 2+ , Ni2+ , Mn 2+ , Zn 2+ , Cu 2+ , to activate sodium persulfate. Ultraviolet visible absorption spectroscopy is used to analyze the transition metal ions with the highest activation efficiency, and 100% of them are compared 100μM、50μM、25μM and 12.5μ M. The Cu 2+ of 25μM has the best activation effect on sodium persulfate, which can effectively promote the oxidative degradation of tetracycline and provide theoretical reference for improving the degradation efficiency of tetracycline.