Effects of type of adsorption isotherms on parallel diffusion of sulfonated dyes into porous cellulose membrane

Maekawa, Masako; Murakami, Kaori; Yoshida, Hiroyuki

doi:10.1007/bf00658759

Cited by 13 publications

(6 citation statements)

References 12 publications

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“…The surface diffusion concept has been employed as a contributing explanation in several various studies involving adsorption (Gutsche and Yoshida 1994;Maekawa et al 1995;Choi et al 2001). In particular, it is reasonable to expect that enzymes such as cellulase can remain attached to a cellulose surface while remaining in motion (Jervis et al 1997;Zhang et al 2016), though such motion may become constrained (Moran-Mirabal et al 2013).…”

Section: Diffusion Along a Solid Surfacementioning

confidence: 99%

Implications of apparent pseudo-second-order adsorption kinetics onto cellulosic materials: A review

Hubbe

Azizian

Douven

2019

BioRes

213

100

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The pseudo-second-order (PSO) kinetic model has become among the most popular ways to fit rate data for adsorption of metal ions, dyes, and other compounds from aqueous solution onto cellulose-based materials. This review first considers published evidence regarding the validity of the mechanistic assumptions underlying application of the PSO model to adsorption kinetics. A literal interpretation of the model requires an assumption that different adsorption sites on a solid substrate randomly collide with each other during a rate-limiting mechanistic step. Because of problems revealed by the literature regarding the usual assumptions associated with the PSO model, this review also considers how else to account for good fits of adsorption data to the PSO model. Studies have shown that adsorption behavior that fits the PSO model well often can be explained by diffusion-based mechanisms. Hypothetical data generated using the assumption of pseudo-first-order rate behavior has been shown to fit the PSO model very well. In light of published evidence, adsorption kinetics of cellulosic materials is expected to mainly depend on diffusionlimited processes, as affected by heterogeneous distributions of pore sizes and continual partitioning of solute species between a dissolved state and a fixed state of adsorption.

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Section: Diffusion Along a Solid Surfacementioning

confidence: 99%

Implications of apparent pseudo-second-order adsorption kinetics onto cellulosic materials: A review

Hubbe

Azizian

Douven

2019

BioRes

213

100

View full text Add to dashboard Cite

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“…collision site located on the surface of a pore and become adsorbed, or the dye molecules may desorb from the binding site and continue their diffusional expedition, travelling further within the water-saturated substrate. Other diffusional models have been proposed for the anionic dye/cellulosic fibre system (eg, 83,[344][345][346][347][348][349][350][351][352][353][354] ).…”

Section: Free Volume Model Of Dye Diffusionmentioning

confidence: 99%

The roles of elevated temperature and carriers in the dyeing of polyester fibres using disperse dyes: Part 1 fundamental aspects

Burkinshaw

2023

Coloration Technology

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This review concerns the application of disperse dyes to poly(ethylene terephthalate) fibres using aqueous immersion dyeing processes and the roles of both elevated dyeing temperatures and carriers in such dyeing systems. This part of the paper presents a review of the fundamental properties and characteristics of poly(ethylene terephthalate) fibres, disperse dyes and dyeing accelerants. In the next part of the paper, the various theories and concepts which have been proposed to explain the promotional effects imparted by elevated dyeing temperatures and carriers to disperse dye uptake on PET and other types of fibre, are reviewed and analysed, from the viewpoints of the essential physico‐chemical aspects of both the aqueous disperse dye/PET and disperse dye/carrier/PET systems. The final part of the paper will present a dual‐mode mechanistic model of the disperse dye adsorption process which can be used to account for the promotional effects imparted by both elevated dyeing temperatures and dyeing accelerants on disperse dye uptake.This article is protected by copyright. All rights reserved.

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“…Although the pore model of dye diffusion has been applied to that of both reactive dyes (in the absence of dye-fibre reaction 22) and leuco vat anions, alternative models have also been proposed to account for the diffusional nature of various types of anionic dye in cellulosic fibres. 19,38,62,[71][72][73][74][75][76][77][78][79] Unfortunately, no single diffusional model has yet been devised that is able to satisfactorily account for the promotional effects of added NaCl or Na 2 SO 4 on the uptake of dye anions on cellulosic fibres. This can be attributed in the most part, to the complex, intrinsically heterogeneous morphology and fine structure of cellulosic fibres, coupled with the complexities of water-inorganic electrolyte-dye anion interactions, etc.…”

Section: Kinetic Analysismentioning

confidence: 99%

The role of inorganic electrolyte (salt) in cellulosic fibre dyeing: Part 2 theories of how inorganic electrolyte promotes dye uptake

Burkinshaw

2021

Coloration Technology

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This review concerns the application of vat dyes, sulphur dyes, azoic colorants, direct dyes and reactive dyes to both natural and man-made cellulosic fibres from aqueous dyebaths using exhaust dyeing processes and the role of added inorganic electrolyte in such dyeing processes. In this part of the paper, the various theories/hypotheses/ concepts which have been proposed to account for the promotional effect exerted by added inorganic electrolyte on dye uptake are reviewed and scrutinised, from the viewpoints of the essential physico-chemical properties of the five classes of dye used and the fundamental aspects of their application.How to cite this article: Burkinshaw SM. The role of inorganic electrolyte (salt) in cellulosic fibre dyeing: Part 2 theories of how inorganic electrolyte promotes dye uptake.

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Effects of type of adsorption isotherms on parallel diffusion of sulfonated dyes into porous cellulose membrane

Cited by 13 publications

References 12 publications

Implications of apparent pseudo-second-order adsorption kinetics onto cellulosic materials: A review

Implications of apparent pseudo-second-order adsorption kinetics onto cellulosic materials: A review

The roles of elevated temperature and carriers in the dyeing of polyester fibres using disperse dyes: Part 1 fundamental aspects

The role of inorganic electrolyte (salt) in cellulosic fibre dyeing: Part 2 theories of how inorganic electrolyte promotes dye uptake

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