Vanadium (IV) sorption by chitosan: Kinetics and equilibrium

doi:10.1016/0043-1354(95)00154-9

Water Research

Volume 30, Issue 2, February 1996, Pages 465-475

https://doi.org/10.1016/0043-1354(95)00154-9 Get rights and content

Abstract

The adsorption of vanadium (IV) by chitosan, a naturally occurring material, is studied according to equilibrium and kinetics. Sorption isotherms are determined and single mechanisms of diffusion are studied. These are regarded as the main limiting steps. The parameters studied are: pH, the initial metal concentration, the particle size of the polymer and the stirring speed. While the fourth parameter has no effect on overall sorption performances, equilibrium and kinetics are greatly influenced by the other three. The speciation of metal in solution, relative to pH and total metal concentration, plays an important part in the separation factor between the solid and liquid phases, and on the diffusion of solute through the polymer surface. It has been demonstrated that the sorption, in the case of chitosan is mainly located on the surface. The diffusion mechanisms are both external and intraparticle phenomena: but diffusion is restricted to a thin layer of the particle. An increase of the particle size results in a greater time to reach equilibrium. The Langmuir and Freundlich models show relative correlations difficult to estimate considering to the pseudo rectangular isotherm obtained: the equilibrium plateau is quickly reached.

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Vanadium (IV) sorption by chitosan: Kinetics and equilibrium

Abstract

Int. J. Biol. Macromol.

J. appl. Polym. Sci.

Int. J. Min. Process

Water S.A.

Talanta

Carbohyd. Polym.

Biotechnol. Bioeng.

Bull. Kor. Chem. Soc.

Hydrolysis of Cations

Uptake and retention of metals by cell walls of Bacillus subtilis

J. Bacteriol.

Chitosan in crab shell wastes purifies electroplating wastewater

Environ. Prog.

Uptake of Pb2+ and Cu2+ by novel biopolymers

Wat. Res.

Competitive adsorption of two dissolved organics onto activated carbon—II. Adsorption kinetics in batch reactors

Chem. Engng Sci.

Uranium biosorption by a filamentous fungus Mucor miehei: pH effect on mechanisms and performance of uptake

Wat. Res.

Enhancement of metal ion sorption performances of chitosan: effect of the structure on the diffusion properties

Langmuir.

User-oriented batch reactor solutions to the homogenous surface diffusion model

J. environ. Engng Div.

Functional monomers and polymers. Part XXXXVIII. Adsorption of metal ions onto chitosan

Tech. Rep. Osaka Univ.

Estudio espectrofotométrico de la interacción de algunos iones metálicos coloreados y quitosano en solución acuosa

Bol. Soc. Chil. Quim.

Modeling and parameter evaluation for adsorption in slurry reactors

Chem. Engng Commun.

Uptake of Pb²⁺ and Cu²⁺ by novel biopolymers