Fe2+过硫酸钠体系降解盐酸四环素的研究*

张良波 许春红 祝慧娜 李 莹 张宝忠

(河南工业大学化学化工与环境学院，河南 郑州 450001)

Fe2+过硫酸钠体系降解盐酸四环素的研究*

张良波 许春红 祝慧娜 李 莹 张宝忠

(河南工业大学化学化工与环境学院，河南 郑州 450001)

采用Fe2+/过硫酸钠体系降解水溶液中的盐酸四环素，探讨了盐酸四环素初始浓度、Fe2+浓度、过硫酸钠浓度、温度、pH等因素对降解效果的影响。单因素实验结果表明，盐酸四环素去除率随着盐酸四环素的初始浓度、过硫酸钠浓度、温度的增大而增大；随着Fe2+浓度的增加，盐酸四环素去除率先增大后减小；酸性条件有利于Fe2+/过硫酸钠体系对盐酸四环素的降解。当盐酸四环素初始质量浓度为50mg/L、Fe2+摩尔浓度为0.10mmol/L、过硫酸钠摩尔浓度为2.0mmol/L、反应温度为30 ℃、pH=3.0时，反应90min后盐酸四环素去除率可达87.6%。Fe2+/过硫酸钠体系对盐酸四环素的降解用一级反应动力学方程进行拟合，得到该反应体系下盐酸四环素降解的活化能为5.173kJ/mol。

高级氧化技术Fe2+硫酸根自由基 盐酸四环素

Abstract: The degradation of tetracycline hydrochloride by Fe2+/sodium persulfate system was studied in this paper. The influence of tetracycline hydrochloride initial concentration,Fe2+concentration and sodium persulfate concentration,reaction temperature and pH on tetracycline hydrochloride degradation efficiency was investigated. The results showed that the degradation efficiency of tetracycline hydrochloride increased with the increasing of the initial concentration of tetracycline hydrochloride,the concentration of sodium persulfate and the reaction temperature. The degradation efficiency of tetracycline hydrochloride increased first and then decreased with the increasing of the Fe2+concentration. Acidic condition was favorable for the degradation of tetracycline hydrochloride by Fe2+/sodium persulfate system. The degradation efficiency of tetracycline hydrochloride could reach 87.6% under the condition of the initial mass concentration of tetracycline hydrochloride 50 mg/L,the molar concentration of Fe2+0.10 mmol/L,the molar concentration of sodium persulfate 2.0 mmol/L,the reaction temperature 30 ℃,the pH 3.0 and the reaction time 90 min. The degradation of tetracycline hydrochloride by Fe2+/sodium persulfate system followed the first order reaction kinetic equation. The activation energy of tetracycline hydrochloride degradation was 5.173 kJ/mol in this reaction system.

Keywords: advanced oxidation technology; Fe2+; sulfate radical; tetracycline hydrochloride

盐酸四环素是一种常用的四环素类抗生素，由于其具有明显的致突变、致畸作用而受到人们的广泛关注[1]。盐酸四环素对生物过程有较强的抑制作用，常规的生物处理工艺不能对其有效去除[2]。常规的物理方法如吸附、反渗透和纳滤等可以去除一些水中的盐酸四环素，但不能对其进行有效降解[3]。液氯氧化等化学氧化法能降解盐酸四环素，但可产生致癌的二次污染物。

1 材料与方法

1.1 材料与仪器

盐酸四环素(美国药典标准级)；……