Journal ArticleDOI
The adsorption of dyes in chitin. III. Intraparticle diffusion processes
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In this article, the amount of dye adsorbed per gram of chitin has been plotted against the square root of time, and the slope of this plot is linear and has been defined as a rate parameter k.Abstract:
Intraparticle diffusion processes for the adsorption of dyestuffs onto chitin have been studied. The amount of dye adsorbed per gram of chitin has been plotted against the square root of time. The slope of this plot is linear and has been defined as a rate parameter k. This rate parameter has been determined for a number of process variables, including initial dye concentration, agitation, chitin particle size, chitin mass, temperature, and solution pH. However, sometimes two and even three linear regions are apparent on the root time plots indicating a possible branched pore mechanism. The controlling mechanisms are due to macropores and micropores in the chitin particle creating rapidly and slowly diffusing regions.read more
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Application of chitosan, a natural aminopolysaccharide, for dye removal from aqueous solutions by adsorption processes using batch studies: A review of recent literature
TL;DR: A review of the use of chitosan and its grafted and crosslinked derivatives for dye removal from aqueous solutions can be found in this paper, which summarizes the key advances and results that have been obtained in their decolorizing application as biosorbents.
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Recent developments in polysaccharide-based materials used as adsorbents in wastewater treatment
TL;DR: In this article, a review of the recent developments in the synthesis of adsorbents containing polysaccharides, in particular modified biopolymers derived from chitin, chitosan, starch and cyclodextrin, is presented.
Journal ArticleDOI
Kinetic models for the sorption of dye from aqueous solution by wood
Yuh-Shan Ho,Gordon McKay +1 more
TL;DR: In this article, the effect of initial dye concentration, wood particle size and temperature on the initial sorption rate of Basic Blue 69 and Acid Blue 25 onto wood has been studied in terms of pseudo-second order, intraparticle diffusion and pseudo-first order chemical sorption processes.
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Kinetics of pollutant sorption by biosorbents: review
TL;DR: A review of the mechanisms of solute sorption onto various biosorbents has been performed in this article, where the mechanisms have been subdivided into reaction based systems and diffusion based systems, and the literature has been reviewed in accordance with these two groups.
Journal ArticleDOI
Initial behavior of intraparticle diffusion model used in the description of adsorption kinetics
TL;DR: In this article, the intraparticle diffusion model (IPD) was applied for the analysis of adsorption kinetics, and the characteristic curves based on this model were plotted with various initial adsorization factors (Ri).