Activation of persulfate in the presence of nitric acid treated granular activated carbon was studied in order to investigate the degradation of metronidazole from aqueous medium in the continuous up-flow fixed-bed reactor. A tubular glass reactor with internal diameter of 2 cm and height of 15 cm was filled with desirable mass of rod shaped activated carbon with diameter of 4 mm and height of 6 mm. The synthetic wastewater containing persulfate and metronidazole was entered into the reactor in up-flow operation. At steady state condition and under the optimum values of operating parameters, about 88 % of influent persulfate was decomposed and decreased to 73 % after 7 h. Under this condition, the metronidazole removal reached to 93 % and gradually decreased to 74 % at the end of process due to the saturation of the catalyst and occupation of available active sites for sulfate radical production. The results indicated promising performance of sulfate radical based advanced oxidation process in continuous fixed-bed reactor for degradation of resistant pollutants from aqueous medium.

为了研究连续上流固定床反应器中甲硝唑从水性介质中的降解，研究了在硝酸处理的颗粒状活性炭存在下过硫酸盐的活化。内径为2厘米，高度为15厘米的管式玻璃反应器中填充了所需质量的直径为4毫米，高度为6毫米的棒状活性炭。含有过硫酸盐和甲硝唑的合成废水在上流操作中进入反应器。在稳态条件下以及在最佳运行参数值下，进水过硫酸盐约有88％分解，并在7小时后降至73％。在这种情况下 甲硝唑的去除率达到93％，并在工艺结束时逐渐降低至74％，这归因于催化剂的饱和和对硫酸根自由基生产可用活性位点的占据。结果表明，在连续固定床反应器中，基于硫酸根自由基的高级氧化工艺可用于降解水性介质中的抗性污染物。