Intraparticle diffusion processes during acid dye adsorption onto chitosan

W. H. Cheung; Y. S. Szeto; G. McKay

doi:10.1016/j.biortech.2006.09.045

Intraparticle diffusion processes during acid dye adsorption onto chitosan

W. H. Cheung, Y. S. Szeto, G. McKay^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

892 Citations (Scopus)

Abstract

The adsorption of five acid dyes onto chitosan was studied. The equilibrium capacities based on the Langmuir analysis were 1.54, 2.66, 1.11, 1.25 and 1.03 mmol/g chitosan for Orange 10 (AO10), Acid Orange 12 (AO12), Acid Red 18 (AR18), Acid Red 73 (AR73) and Acid Green 25 (AG25) respectively. The batch adsorption rate for the five systems based on an intraparticle diffusion rate parameter derived from the plots of dye adsorbed versus the square root of time indicated that the adsorption mechanism was predominantly intraparticle diffusion but there was also a dependence on pore size as the dye diffuses through macropore, mesopore and micropore respectively.

Original language	English
Pages (from-to)	2897-2904
Number of pages	8
Journal	Bioresource Technology
Volume	98
Issue number	15
DOIs	https://doi.org/10.1016/j.biortech.2006.09.045
Publication status	Published - Nov 2007
Externally published	Yes

Keywords

Acid dyes
Adsorption
Chitosan
Diffusion
Intraparticle

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10.1016/j.biortech.2006.09.045

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abstract = "The adsorption of five acid dyes onto chitosan was studied. The equilibrium capacities based on the Langmuir analysis were 1.54, 2.66, 1.11, 1.25 and 1.03 mmol/g chitosan for Orange 10 (AO10), Acid Orange 12 (AO12), Acid Red 18 (AR18), Acid Red 73 (AR73) and Acid Green 25 (AG25) respectively. The batch adsorption rate for the five systems based on an intraparticle diffusion rate parameter derived from the plots of dye adsorbed versus the square root of time indicated that the adsorption mechanism was predominantly intraparticle diffusion but there was also a dependence on pore size as the dye diffuses through macropore, mesopore and micropore respectively.",

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author = "Cheung, {W. H.} and Szeto, {Y. S.} and G. McKay",

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T1 - Intraparticle diffusion processes during acid dye adsorption onto chitosan

AU - Cheung, W. H.

AU - Szeto, Y. S.

AU - McKay, G.

PY - 2007/11

Y1 - 2007/11

N2 - The adsorption of five acid dyes onto chitosan was studied. The equilibrium capacities based on the Langmuir analysis were 1.54, 2.66, 1.11, 1.25 and 1.03 mmol/g chitosan for Orange 10 (AO10), Acid Orange 12 (AO12), Acid Red 18 (AR18), Acid Red 73 (AR73) and Acid Green 25 (AG25) respectively. The batch adsorption rate for the five systems based on an intraparticle diffusion rate parameter derived from the plots of dye adsorbed versus the square root of time indicated that the adsorption mechanism was predominantly intraparticle diffusion but there was also a dependence on pore size as the dye diffuses through macropore, mesopore and micropore respectively.

AB - The adsorption of five acid dyes onto chitosan was studied. The equilibrium capacities based on the Langmuir analysis were 1.54, 2.66, 1.11, 1.25 and 1.03 mmol/g chitosan for Orange 10 (AO10), Acid Orange 12 (AO12), Acid Red 18 (AR18), Acid Red 73 (AR73) and Acid Green 25 (AG25) respectively. The batch adsorption rate for the five systems based on an intraparticle diffusion rate parameter derived from the plots of dye adsorbed versus the square root of time indicated that the adsorption mechanism was predominantly intraparticle diffusion but there was also a dependence on pore size as the dye diffuses through macropore, mesopore and micropore respectively.

KW - Acid dyes

KW - Adsorption

KW - Chitosan

KW - Diffusion

KW - Intraparticle

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DO - 10.1016/j.biortech.2006.09.045

M3 - Article

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AN - SCOPUS:34247140951

SN - 0960-8524

VL - 98

SP - 2897

EP - 2904

JO - Bioresource Technology

JF - Bioresource Technology

IS - 15

ER -

Intraparticle diffusion processes during acid dye adsorption onto chitosan

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Keywords

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