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Removal Of methylene blue dye from simulated wastewater by alginic acid fiber as adsorbent: Equilibrium, kinetic, and thermodynamic studies
Author(s) -
Guo Chunxiang,
Kong Qingshan,
Gao Jixian,
Ji Quan,
Xia Yanzhi
Publication year - 2011
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20481
Subject(s) - freundlich equation , alginic acid , adsorption , langmuir , methylene blue , chemistry , diffusion , aqueous solution , chemisorption , thermodynamics , chromatography , exothermic reaction , organic chemistry , biochemistry , physics , photocatalysis , catalysis
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.