Department of Environmental Engineering, Ondokuz Mayis University, Samsun, Turkey.
Environ Technol. 2011 Aug-Sep;32(11-12):1183-93. doi: 10.1080/09593330.2010.529946.
Red mud, an industrial by-product generated during the processing of bauxite ore, was investigated as an inexpensive and effective adsorbent for the adsorption of methylene blue from aqueous solution. Chemical and heat treatments were applied to the raw red mud. The effects of contact time, adsorbent amount, pH, temperature and initial dye concentration were investigated. The adsorption isotherm and kinetics of the raw and activated red mud were studied. Freundlich, Temkin and Dubinin-Radushkevich isotherms were obtained using concentrations of methylene blue ranging from 10 to 70 mg/L. The results indicated that the Dubinin-Radushkevich model provides the best correlation of the experimental data. The adsorption rate data were analysed according to the pseudo-first order kinetic, pseudo-second order kinetic, intraparticle diffusion kinetic and Elovich kinetic models. The pseudo-second order kinetic was the best fit kinetic model for the experimental data.
赤泥是在铝土矿加工过程中产生的一种工业副产品，被研究为一种从水溶液中吸附亚甲基蓝的廉价有效吸附剂。对原赤泥进行了化学和热处理。考察了接触时间、吸附剂用量、pH 值、温度和初始染料浓度的影响。研究了原赤泥和活化赤泥的吸附等温线和动力学。用浓度为 10-70mg/L 的亚甲基蓝得到了 Freundlich、Temkin 和 Dubinin-Radushkevich 等温线。结果表明，Dubinin-Radushkevich 模型能最好地关联实验数据。根据准一级动力学、准二级动力学、内扩散动力学和 Elovich 动力学模型对吸附速率数据进行了分析。准二级动力学是实验数据的最佳拟合动力学模型。
