Hameed B H
School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia.
J Hazard Mater. 2008 Jun 15;154(1-3):204-12. doi: 10.1016/j.jhazmat.2007.10.010. Epub 2007 Oct 12.
In this work, sunflower (Helianthus annuus L.) seed hull (SSH), an agricultural waste, was evaluated for its ability to remove methyl violet (MV) from aqueous solutions. Sorption isotherm of MV onto the SSH was determined at 30 degrees C with the initial concentrations of MV in the range of 25-300 mg/L. The equilibrium data were analyzed using the Langmuir, Freundlich and Temkin isotherm models. The equilibrium process was described well by the Freundlich isotherm model. The maximum SSH sorption capacity was found to be 92.59 mg/L at 30 degrees C. The kinetic data were studied in terms of the pseudo-first-order, pseudo-second-order and intraparticle diffusion kinetic models. The pseudo-second-order model best described the sorption process. A single-stage batch-adsorber design of the adsorption of MV onto SSH was studied based on the Freundlich isotherm equation. The results indicated that sunflower seed hull was an attractive candidate for removing methyl violet from aqueous solution.
在本研究中，对作为农业废弃物的向日葵（Helianthus annuus L.）种子壳（SSH）从水溶液中去除甲基紫（MV）的能力进行了评估。在30℃下，以25 - 300 mg/L范围内的甲基紫初始浓度测定了甲基紫在SSH上的吸附等温线。使用朗缪尔（Langmuir）、弗伦德利希（Freundlich）和坦金（Temkin）等温线模型对平衡数据进行了分析。弗伦德利希等温线模型很好地描述了平衡过程。发现在30℃下，SSH的最大吸附容量为92.59 mg/L。根据伪一级、伪二级和颗粒内扩散动力学模型研究了动力学数据。伪二级模型最能描述吸附过程。基于弗伦德利希等温线方程，研究了甲基紫在SSH上吸附的单级间歇吸附器设计。结果表明，向日葵种子壳是从水溶液中去除甲基紫的一个有吸引力的候选材料。
