Gerçel Ozgül, Gerçel H Ferdi, Koparal A Savaş, Oğütveren Ulker Bakir
Department of Environmental Engineering, Faculty of Engineering, Anadolu University, Iki Eylül Campus, 26555 Eskişehir, Turkey.
J Hazard Mater. 2008 Dec 30;160(2-3):668-74. doi: 10.1016/j.jhazmat.2008.03.039. Epub 2008 Mar 20.
The adsorption of Disperse Orange 25 (3-[N-ethyl-4-(4-nitrophenylazo) phenylamino] propionitrile) onto activated carbon was investigated in a batch system with respect to contact time, carbon dosage, pH and temperature from aqueous solutions. The Langmuir, Freundlich and Dubinin-Radushkevich (D-R) adsorption models were applied to describe the equilibrium isotherms and the isotherm constants were also determined. The Langmuir isotherm model agrees with the experimental data well. Maximum adsorption capacity (qmax) of Disperse Orange 25 onto adsorbent was 118.93mgg(-1) at 20 degrees C. The first-order, pseudo-second-order kinetic models and the intraparticle diffusion model were used to describe the kinetic data and the rate constants were evaluated as well. The experimental data fitted very well to pseudo-second-order kinetic model. The results show that activated carbon prepared from Euphorbia rigida by sulfuric acid chemical activation could be employed as low-cost material to compare with commercial activated carbon for the removal of disperse dyes from effluents.
在间歇式系统中，研究了分散橙25（3-[N-乙基-4-(4-硝基苯偶氮)苯胺基]丙腈）从水溶液中吸附到活性炭上的情况，考察了接触时间、碳用量、pH值和温度等因素。应用朗缪尔、弗伦德里希和杜比宁-拉杜舍维奇（D-R）吸附模型来描述平衡等温线，并确定了等温线常数。朗缪尔等温线模型与实验数据吻合良好。在20℃时，分散橙25在吸附剂上的最大吸附容量（qmax）为118.93mg g(-1)。采用一级、准二级动力学模型和颗粒内扩散模型来描述动力学数据，并评估了速率常数。实验数据与准二级动力学模型拟合得非常好。结果表明，通过硫酸化学活化法由硬胶大戟制备的活性炭可作为低成本材料，与商业活性炭相比，用于去除废水中的分散染料。
