渗氮活性炭对2，4-二氯苯酚的吸附动力学特性

采用间歇实验方法研究了2，4-二氯苯酚（2，4-DCP）在渗氮活性炭上的吸附性能，并与传统活性炭进行了比较．结果表明活性炭渗氮处理后对2，4DCP的吸附能力大大增强．同时探讨了渗氮活性炭对2，4-DCP的吸附等温线、吸附动力学和吸附热力学特征．采用Langmuir和Freundlich等温方程对2，4-DCP在渗氮活性炭上的吸附平衡数据进行了拟合，结果显示渗氮活性炭对2，4-DCP的吸附更符合Freundlich方程；分别采用拟一级反应、拟二级反应和颗粒内扩散反应模型考察了渗氮活性炭在不同温度下的反应动力学并拟合了这些动力学模型的速率常数，拟二级反应动力学模型被证实与实验结果有较好的相关性；最后分别计算了吸附的热力学参数，结果表明渗氮活性炭对2，4-DCP的吸附是放热的和自发的物理吸附过程．

Kinetics of adsorption of 2,4-dichlorophenol by nitrogen doping activated carbon

In this study,batch experiments were conducted to investigate the adsorption of 2,4-dichlorophenol (2,4-DCP) by nitrogen doping activated carbon (AC) by comparing its adsorption ability with traditional AC. Results showed that the adsorption capacity of AC increases rapidly after the modification of nitrogen doping. The adsorption property of 2,4-DCP on the nitrogen doping activated carbon was discussed from the isotherm,kinetic and thermodynamic characteristics. Equilibrium data were fitted to Langmuir and...