高铁酸钾去除饮用水源中盐酸四环素试验研究

Removal of Tetracycline Hydrochloride from Drinking Water Source by Potassium Ferrate

利用提纯后的次氯酸钠溶液、硝酸铁、氢氧化钾制备高铁酸钾。并采用高铁酸钾氧化去除水中盐酸四环素（TC），初步探讨了高铁酸钾去除TC的效果，研究了高铁酸钾投加量、pH值、氧化时间等对去除效率的影响。结果表明，高铁酸钾可以有效快速地去除水中的TC，在一定范围内，高铁酸钾投加越多，TC去除率越高，反应越快。pH值对反应影响较大，最优pH值范围为9～10。降解反应主要发生在前60S，在之后的10-20min内高铁酸钾与TC持续反应，TC得到进一步的降解。当高铁酸钾与TC摩尔比为1：1和1：5时，反应60S后的TC去除率约为100％。但反应液TOC下降幅度不大，说明大部分的TC仅转化为中间产物，未得到彻底矿化。

Potassium ferrate （Fe（VI）） was prepared by using purified sodium hypochlorite solution, iron （III） nitrate, potassium hydroxide. The removal performance of the tetracycline hydrochloride （TC） in water by using potassium ferrate was investigated. The effects of dosage of ferrate, pH value, oxidizing time on the removal rate of TC were studied. It is found that the optimal pH value range for TC degradation is 9-10, and TC could he removed by ferrate efficiently and quickly. The removal efficiency of TC and reaction rate were increased with lager dose of ferrate. The major degradation of TC occurred during th 1 ： 1 and occurred products e first 60s, followed by further degradation over next 10-20 min. At Fe（VI） ： 1 ： 5, approximately 100% of the TC was removed after 60 s. Only a sma TC molar ratios of 11 reduction o in spite of quick conversion of TC, implicating that a majority of TC transformed into interme without complete mineralization.