Removal Of methylene blue dye from simulated wastewater by alginic acid fiber as adsorbent: Equilibrium, kinetic, and thermodynamic studies
Removal Of methylene blue dye from simulated wastewater by alginic acid fiber as adsorbent: Equilibrium, kinetic, and thermodynamic studies
复制标题
DOI：
10.1002/cjce.20481
复制
发表时间：
2011-12
影响因子：
2.1
通讯作者：
C. Guo;Qingshan Kong;Jixian Gao;Q. Ji;Yanzhi Xia
中科院分区：
文献类型：
--
作者：
C. Guo;Qingshan Kong;Jixian Gao;Q. Ji;Yanzhi Xia
以海藻酸纤维为吸附剂，研究了其对亚甲基蓝的吸附机理。系统变量，包括接触时间，pH值，温度和初始浓度进行了检查，以研究在批实验中的吸附效果。结果表明，在20 min内达到平衡，pH值对平衡值有显著影响。采用Langmuir、Freundlich和Temkin等温模型分析了其等温行为。结果表明，吸附等温线符合Freundlich和Temkin模型，表明吸附过程为化学吸附。伪一阶，伪二阶，和粒子内扩散模型进行了研究的动力学行为。动力学行为最好用伪二级模型描述。热力学参数表明该过程是自发的放热过程。
Alginic acid fiber was used as a novel adsorbent to remove methylene blue from aqueous solution, and adsorption mechanisms were investigated. System variables, including contact time, pH, temperature, and initial concentration were examined to investigate the effect on adsorption in batch experiments. The results showed that equilibrium reached in less than 20 min and pH significantly influenced the equilibrium value. Langmuir, Freundlich, and Temkin isotherm models were employed to analyse the isotherm behaviours. It was found the isotherm behaviours conform to Freundlich and Temkin models well, indicating a chemisorption process. Pseudo-first-order, pseudo-second-order, and intraparticle diffusion models were employed to investigate kinetic behaviours. The kinetic behaviour is best described by pseudo-second-order model. Thermodynamic parameters indicate that the process is spontaneous and exothermic.