【摘要】 研究了传质促进剂(促传剂)对臭氧降解水中对硝基酚的影响,筛选出了两种效果较好的促传剂。实验测定了臭氧在鼓泡反应塔中的传质系数以及添加促传剂后传质系数增大的倍数。还测定了添加促传剂后酚溶液表面张力的变化,并初步探讨了促传剂的作用机理。更多还原

【Abstract】 The effect of four additives on the absorption rate of ozone in water and the ozonation rate of p-nitrophenol solution was investigated in a bubble column. The nonyl acid and heptanoic acid were been found to be more effective than amyl alcohol and n-heptyl alcohol in enhancing mass transfer of ozone and degradation of p-nitrophenol. The enhancement factor, a measure of increase in ozone mass transfer coefficient due to the additives, nonyl acid and heptanoic acid, was determined to be 1.31 and 1.21 respectively. Furthermore, the surface tension of p-nitrophenol solution with or without additives was measured. A sharp decrease in surface tension with nonyl acid and heptanoic acid was observed and the mechanism of the mass transfer enhancement by these additives was discussed briefly.更多还原