Senthilkumaar S, Kalaamani P, Subburaam C V
Department of Chemistry, Faculty of Engineering, PSG College of Technology, Coimbatore 641004, India.
J Hazard Mater. 2006 Aug 25;136(3):800-8. doi: 10.1016/j.jhazmat.2006.01.045. Epub 2006 May 3.
Adsorption of Crystal violet, a basic dye onto phosphoric and sulphuric acid activated carbons (PAAC and SAAC), prepared from male flowers coconut tree has been investigated. Equilibrium data were successfully applied to study the kinetics and mechanism of adsorption of dye onto both the carbons. The kinetics of adsorption was found to be pseudo second order with regard to intraparticle diffusion. The pseudo second order is further supported by the Elovich model, which in turn intensifies the fact of chemisorption of dye onto both the carbons. Quantitative removal of dye at higher initial pH of dye solution reveals the basic nature of the Crystal violet and acidic nature of the activated carbons. Influence of temperature on the removal of dye from aqueous solution shows the feasibility of adsorption and its endothermic nature. Mass transfer studies were also carried out. The adsorption capacities of both the carbons were found to be 60.42 and 85.84 mg/g for PAAC and SAAC, respectively. Langmuir's isotherm data were used to design single-stage batch adsorption model.
对由椰树雄花制备的磷酸和硫酸活化碳（PAAC 和 SAAC）对碱性染料结晶紫的吸附进行了研究。平衡数据成功用于研究染料在这两种碳上的吸附动力学和机理。发现吸附动力学在颗粒内扩散方面符合准二级动力学。Elovich 模型进一步支持了准二级动力学，这反过来又强化了染料在这两种碳上发生化学吸附的事实。在较高初始染料溶液 pH 值下对染料的定量去除揭示了结晶紫的碱性性质和活化碳的酸性性质。温度对从水溶液中去除染料的影响表明了吸附的可行性及其吸热性质。还进行了传质研究。发现 PAAC 和 SAAC 这两种碳的吸附容量分别为 60.42 和 85.84 mg/g。Langmuir 等温线数据用于设计单级间歇吸附模型。
