活性炭固定床对苯酚废水的动态吸附研究

Research on Dynamic Adsorption of Phenol Wastewater by Activated Carbon Fixed Bed

研究了活性炭固定床对水中苯酚的动态吸附特性及影响因素。结果表明,活性炭对苯酚废水的动态吸附随进水苯酚含量和流量的增大穿透时间缩短,但最大设计体积流量不能超过6.47 m L/min;随固定床高度增加,穿透时间推迟,但最小设计高度不能小于8 cm。无效层厚度随进水流量和固定床高度的增加而增大,随进水苯酚含量增大而减少。经拟合发现实验结果更符合Yoon-Nelson模型,且相关系数都在0.9以上。

The dynamic adsorption characteristics of phenol in water and influencing factors by activated carbon fixed bed were investigated. The results indicated that the penetration time of phenol was shorten with the increase of initial phenol content and flow rate, but maximum design volume flow rate could not more than 6.47 mL/min. And the penetration time was prolonged with the increase of fixed bed height, but the smallest design height of fixed bed could not less than 8 cm. Invalid layer thickness became thicker with the increase of flow rate and fixed bed height, but it got shorter with the increase of initial phenol content. Fitting analysis of experimental data, the experimental results fit the Yoon-Nelson model, and all the correlation coefficients were over 0.9.