Department of Chemistry, Anna University Chennai: University College of Engineering Pattukottai, Rajamadam 614701, India.
Carbohydr Polym. 2013 Oct 15;98(1):505-13. doi: 10.1016/j.carbpol.2013.05.078. Epub 2013 Jun 14.
The kinetic, thermodynamic and isotherm modeling studies were carried out on adsorptive removal of Victoria blue (VB) dye using activated carbon, Ba/alginate and modified carbon/Ba/alginate polymer beads. The feasibility of sorption process was determined by varying the experimental parameters viz., dye concentration (4-20 mg L(-1)), contact time (10-90 min), pH (3-10), adsorbent dose (0.5-2.5 g) and temperature (303-343 K). Freundlich and Langmuir isotherms were determined and ascertained with the dimensionless separation factor (RL). Lagergren's pseudo-first order, pseudo-second order and intraparticle diffusion model equations were used to analyze the kinetics of the adsorption process. The thermodynamic consistency of adsorption was found with Gibbs free energy (ΔG°), changes in enthalpy (ΔH°) and entropy (ΔS°) were calculated using the Van't Hoff plot. The polymer beads were characterized using Fourier Transform Infrared Spectroscopy (FTIR) and their morphology was determined by scanning electron microscopy (SEM).
采用活性炭、钡/藻酸盐和改性碳/钡/藻酸盐聚合物珠对维多利亚蓝 (VB) 染料进行吸附去除，进行了动力学、热力学和等温线模型研究。通过改变实验参数（如染料浓度 (4-20 mg L(-1))、接触时间 (10-90 min)、pH 值 (3-10)、吸附剂剂量 (0.5-2.5 g) 和温度 (303-343 K)），确定了吸附过程的可行性。测定了 Freundlich 和 Langmuir 等温线，并确定了无量纲分离因子 (RL)。采用 Lagergren 拟一级、拟二级和内扩散模型方程分析了吸附过程的动力学。通过 Van't Hoff 图计算了吸附的热力学一致性，用吉布斯自由能 (ΔG°)、焓变 (ΔH°) 和熵变 (ΔS°) 进行了描述。采用傅里叶变换红外光谱 (FTIR) 对聚合物珠进行了表征，并通过扫描电子显微镜 (SEM) 确定了它们的形态。
