【摘要】 采用次氯酸盐氧化法制备高铁酸钾,研究了反应温度、洗涤所用溶剂种类、氢氧化钾的添加方式对高铁酸钾产率和纯度的影响。另外,还考察了不同反应条件下高铁酸钾对水中2,4,6-三氯酚的去除效果。试验结果显示,在反应温度为36℃、水的pH值约为7的条件下,对2,4,6-三氯酚浓度为10 mg/L的配水采用100 mg/L的K2FeO4氧化处理58 m in后,对2,4,6-三氯酚的去除率可达99.2%,其含量降为0.08 mg/L,达到了国家排放标准;反应的最佳pH≤1,最佳水温为40℃。高铁酸钾与2,4,6-三氯酚的氧化反应为一级反应,且主要发生在最初的几分钟内,是一个快速反应过程。更多还原

【Abstract】 Potassium ferrate（Ⅵ） was prepared through the hypochlorite oxidation method,and the preparation method of K₂FeO₄ was improved.The effects of reaction temperature,type of washing solvents used and the addition of potassium hydroxide on yields and purity of K₂FeO₄ were investigated.In addition,the removal efficiency of the 2,4,6-trichlorophenol in water at different reaction conditions by K₂FeO₄ were studied.The experimental results show that when the reaction temperature is 36 ℃ and the pH value of the water is 7,a dose for potassium ferrate（Ⅵ） 100 mg/L can remove 99.2% of the 10 mg/L 2,4,6-trichlorophenol during the 5-8 min oxidation,making the final content of the 2,4,6-（trichlorophenol） in effluent to be 0.08 mg/L,which meets the national integrated wastewater discharge standard（less than 0.6 mg/L）.The optimal pH value range is pH≤1,and the optimal reaction temperature is 40 ℃.Removals under such conditions of the 2,4,6-trichlorophenol usually occurs within a few minutes and are rapid reaction processes.The removal follows the first-order kinetic law for the 2,4,6-（trichlorophenol.）更多还原