Department of Inorganic Chemistry, Faculty of Chemistry, Maria Curie-Sklodowska University, 20-031 Lublin, Poland.
J Hazard Mater. 2009 Dec 30;172(2-3):868-74. doi: 10.1016/j.jhazmat.2009.07.069. Epub 2009 Jul 25.
In the present study, the gel anion exchanger Purolite A-850 of N(+)(CH(3))(3) functional groups was used in order to remove the acidic dye (Acid Blue 29) from aqueous solutions. Batch experiments were conducted to study the effect of phase contact time (1-180 min), initial concentration of dye (100-500 mg/L), solution pH (1-8), anion exchanger dosage (0.25-1.0 g) as well as temperature (20-40 degrees C). The contact time necessary to reach equilibrium was 40 min with the exception for the solution of the initial concentration 500 mg/L. The amounts of Acid Blue 29 adsorbed at equilibrium using the strongly basic anion exchanger were equal to 9.97, 19.97, 29.96 and 49.90 mg/g for the dye solutions of the initial concentrations 100, 200, 300 and 500 mg/L, respectively. The equilibrium sorption capacity slightly increased when the temperature of dye solution increased from 20 to 40 degrees C. The experimental data were analyzed by the Langmuir, Freundlich and Temkin models of adsorption. The adsorption isotherm data were fitted well to the Langmuir isotherm and the monolayer adsorption capacity was found to be 83.303 mg/g at 20 degrees C. The value of R(L) was equal to 0.00054 (favourable). The kinetic data obtained at different concentrations were modeled using the pseudo-first order, pseudo-second order and intraparticle diffusion equations. The experimental data were well described by the pseudo-second order kinetic model.
在本研究中，使用了具有 N(+)(CH(3))(3)官能团的凝胶阴离子交换剂 Purolite A-850 从水溶液中去除酸性染料（酸性蓝 29）。进行了批量实验，以研究相接触时间（1-180 分钟）、染料初始浓度（100-500mg/L）、溶液 pH 值（1-8）、阴离子交换剂用量（0.25-1.0g）以及温度（20-40°C）的影响。达到平衡所需的接触时间为 40 分钟，但初始浓度为 500mg/L 的溶液除外。使用强碱性阴离子交换剂在平衡时吸附的酸性蓝 29 的量分别为 100、200、300 和 500mg/L 染料溶液的 9.97、19.97、29.96 和 49.90mg/g。当染料溶液温度从 20°C 升高到 40°C 时，平衡吸附容量略有增加。实验数据通过 Langmuir、Freundlich 和 Temkin 吸附模型进行了分析。吸附等温线数据很好地符合 Langmuir 等温线，并且在 20°C 时单层吸附容量为 83.303mg/g。R(L)的值等于 0.00054（有利）。在不同浓度下获得的动力学数据使用拟一级、拟二级和内扩散方程进行了建模。实验数据很好地符合拟二级动力学模型。
