碱式过氧化氢氧化处理甲醛废水的研究

Treatment on Formaldehyde Wastewater by Basic Hydrogen Peroxide Oxidation

本研究通过单因子最优水平实验确定了碱性碱式过氧化氢氧化处理甲醛废水的最佳条件.实验证实:过氧化氢与甲醛含量比、碱投加量、反应温度、反应时间、初始甲醛浓度以及非均相催化剂的加入都对氧化效果有一定的影响.在最佳氧化条件下处理甲醛浓度为998.2 mg/L的模拟废水,出水中甲醛含量为14.5 mg/L,去除率达98.55%.实验还证实,甲醛去除率随其初始浓度的升高而升高,且非均相催化剂的加入对氧化效果具有一定的改善作用.

The optimality conditions of basic hydrogen peroxide oxidation was determined by single-factor tests. It shows that the final oxidation effect can be influenced by molar ratio of hydrogen peroxide to formaldehyde, alkalinity, temperature, reaction time, initial formaldehyde concentration and addition of heterogeneous catalyst. HCHO removal rate can reach 98.55% with a outlet concentration of 14.5 mg/L when oxidation was carried out on the optimizing conditions. Further experiments also shows that oxidation effect can be improved by the addition of initial formaldehyde concentration and heterogeneous catalyst.