以水中盐酸金霉素为目标污染物，研究了活性炭活化过硫酸钠对盐酸金霉素的降解效果及机制。结果表明，活性炭与过硫酸钠联合体系对盐酸金霉素的去除效果要好于活性炭和过硫酸钠的单一体系。活性炭活化过硫酸盐体系的最佳条件为：活性炭投加质量为0.2 g、盐酸金霉素与过硫酸钠摩尔比为1∶50、pH为3，该条件下对初始质量浓度为50 mg/L的盐酸金霉素的降解率可达到80%以上。活性炭的重复利用性能较高，3次重复使用后降解率仍保持在60%以上。无机盐离子对体系氧化降解盐酸金霉素有一定的抑制作用。自由基鉴定试验结果表明，·SO₄^-在整个处理体系中起主要的降解作用。紫外-可见光谱分析发现，盐酸金霉素在分解过程中其苯环结构被破坏。活性炭活化过硫酸盐氧化法可高效去除水中的四环素类抗生素。

The degradation efficiency of chlortetracycline hydrochloride (CH) in aqueous solution by sodium persulfate (Na₂S₂O₈) that is activated with activated carbon (AC) are systematically investigated.The results show that the removal efficiency of CH over AC-activated sodium persulfate are higher than that over AC or sodium persulfate alone.More than 80% of CH with an initial concentration of 50 mg·L^-1 has been removed by AC activated Na₂S₂O₈ in 6 h under the optimal treatment conditions that the dosage of AC is 0.2 g,the molar ratio of CH to Na₂S₂O₈ is 1：50,and pH is 3.The degradation rate of CH can still exceed 60% after activated carbon has been recycled for three times.Inorganic salt anion such as Cl^-,CO₃^2- and HCO₃^- can significantly inhibit the degradation of CH in an AC-activated persulfate oxidation system.Free radical identification test shows that sulfate radical (SO₄^-·) is more important radical responsible for degradation than hydroxyl radical (HO·).The results confirm that the oxidation technology of AC-activated Na₂S₂O₈ can effectively remove tetracycline antibiotics in water.

安璐(1995-),女,硕士研究生,研究方向为过硫酸盐氧化技术,2031860548@qq.com