Activated carbon with surface area of 896 m²/g has been prepared from the wood of Thevetia Neriifolia Juss (TNJAC). The fitness of the prepared activated carbon is tested for its adsorption capability towards the textile dye direct orange 102 (DO102). On increasing the solution pH from 2 to 12, the percentage of DO102 adsorption increases from 41 to 75%. The adsorption kinetics is analyzed using pseudo-first order and pseudo-second order kinetic models. Pseudo-second order model is more appropriate to describe the adsorption kinetics with a correlation coefficient of 0.9311< r²< 0.9871. On analyzing the adsorption isotherm using Langmuir and Freundlich models, the adsorption of DO102 by TNJAC follows Langmuir type of isotherm with energetically homogeneous sorbent surface.

中文翻译：

---

Direct Orange 102染料在非常规吸附剂上的传质研究

用Thevetia Neriifolia Juss（TNJAC）的木材制备了表面积为896 m ² / g的活性炭。测试制备的活性炭的适合性，以测定其对纺织品染料直接橙102（DO102）的吸附能力。上增加溶液p h，从2至12，的DO102吸附增加从41％至75％的百分比。使用拟一级动力学模型和拟二级动力学模型分析吸附动力学。伪二级模型更适合描述吸附动力学，相关系数为0.9311 <r ²<0.9871。使用Langmuir和Freundlich模型分析吸附等温线时，TNJAC对DO102的吸附遵循Langmuir型等温线，其吸附剂表面能量均匀。