雾化-多相协同臭氧氧化处理硝基苯废水的动力学研究

Study on Degradation Dynamics of Nitrobenzene Wastewater by Atomization- Heterogeneous Synergetic Ozonation

硝基苯属于典型的难降解有机化合物,通过雾化-多相协同臭氧氧化技术对硝基苯废水的处理效果进行了分析研究。通过对实验中的主要影响因素进行分析,结果表明,液滴粒径对硝基苯降解速率常数具有负相关性;紫外灯功率、活性炭投加量和水温对硝基苯降解速率常数具有正相关性;p H值和臭氧投加量对硝基苯降解速率常数具有最佳值。雾化-多相协同臭氧氧化技术对硝基苯的降解过程遵从一级化学反应动力学方程。经验动力学方程为:C=C0exp(-4.54×10-6Q0.50G0.31W0.11t)。

Abstract： Nitrobenzene is typical of refractory organic compounds. The technology of atomization - heterogeneous synergetic ozonation oxidized nitrobenzene for nitrobenzene wastewater treatment were analyzed. By the analysis of the main factors in the ex- periment, the results showed that the nitrobenzene degradation rate constant exerted the positive correlation with ultraviolet lamp power, GAC dosage and temperature, and negative correlation with the droplet size. The pH value and ozone dosage on nitroben- zene degradation rate constant had an optimal value. The technology of atomization - heterogeneous synergetic ozonation oxidized nitrobenzene complied with first - order kinetics. The kinetic practical equation could be expressed as follows：C=C0exp（-4.54＆#215;10-6Q0.50G0.31W0.11t）.