Modelling of basic blue-9 dye sorption onto hydrolyzed polyacrylonitrile grafted starch composite
This study reports the synthesis of a superabsorbent hydrogel (HS) through the polyacrylonitrile (PAN) graft copolymerization and subsequent hydrolysis of corn starch. The surface morphology and chemistry, as well as the physicochemical characteristics of the hydrogel, were elucidated. The effective...
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doaj-f0d4245dd6c244e4832febc90e0226812021-08-28T04:49:12ZengElsevierCarbohydrate Polymer Technologies and Applications2666-89392021-12-012100141Modelling of basic blue-9 dye sorption onto hydrolyzed polyacrylonitrile grafted starch compositeChukwunonso O. Aniagor0M.A. Afifi1A. Hashem2Department of Chemical Engineering, Nnamdi Azikiwe University, P.M.B. 5025, Awka, Nigeria; Corresponding authors.Textile Research Division, National Research Centre, Dokki, Cairo, EgyptTextile Research Division, National Research Centre, Dokki, Cairo, Egypt; Corresponding authors.This study reports the synthesis of a superabsorbent hydrogel (HS) through the polyacrylonitrile (PAN) graft copolymerization and subsequent hydrolysis of corn starch. The surface morphology and chemistry, as well as the physicochemical characteristics of the hydrogel, were elucidated. The effectiveness of the synthesized hydrogel sorbent for remediating a basic blue-9 dye contaminated stream was subsequently investigated. Also, the relationship between the different process variables and the hydrogels’ remediation (sorption) capacity was studied, while the generated experimental kinetic and equilibrium data were effectively modelled using relevant isotherm and kinetic models. The Langmuir isotherm and pseudo-first-order kinetic models fitted best to the equilibrium and kinetic data, respectively. By applying specified mechanistic models, the intraparticle diffusion mechanism was identified as the sole rate-limiting step of the sorption process. The hydrogel showed excellent water absorption and monolayer sorption capacities of 710 ±1.6 g water/g and 343.27 ±1.3 mg/g, respectively. Thus, the hydrogel shows potential for the decontamination of dyestuff polluted streams.http://www.sciencedirect.com/science/article/pii/S2666893921001092Basic blue 9 dyeAdsorptionHydrogelCorn starchModelling |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chukwunonso O. Aniagor M.A. Afifi A. Hashem |
spellingShingle |
Chukwunonso O. Aniagor M.A. Afifi A. Hashem Modelling of basic blue-9 dye sorption onto hydrolyzed polyacrylonitrile grafted starch composite Carbohydrate Polymer Technologies and Applications Basic blue 9 dye Adsorption Hydrogel Corn starch Modelling |
author_facet |
Chukwunonso O. Aniagor M.A. Afifi A. Hashem |
author_sort |
Chukwunonso O. Aniagor |
title |
Modelling of basic blue-9 dye sorption onto hydrolyzed polyacrylonitrile grafted starch composite |
title_short |
Modelling of basic blue-9 dye sorption onto hydrolyzed polyacrylonitrile grafted starch composite |
title_full |
Modelling of basic blue-9 dye sorption onto hydrolyzed polyacrylonitrile grafted starch composite |
title_fullStr |
Modelling of basic blue-9 dye sorption onto hydrolyzed polyacrylonitrile grafted starch composite |
title_full_unstemmed |
Modelling of basic blue-9 dye sorption onto hydrolyzed polyacrylonitrile grafted starch composite |
title_sort |
modelling of basic blue-9 dye sorption onto hydrolyzed polyacrylonitrile grafted starch composite |
publisher |
Elsevier |
series |
Carbohydrate Polymer Technologies and Applications |
issn |
2666-8939 |
publishDate |
2021-12-01 |
description |
This study reports the synthesis of a superabsorbent hydrogel (HS) through the polyacrylonitrile (PAN) graft copolymerization and subsequent hydrolysis of corn starch. The surface morphology and chemistry, as well as the physicochemical characteristics of the hydrogel, were elucidated. The effectiveness of the synthesized hydrogel sorbent for remediating a basic blue-9 dye contaminated stream was subsequently investigated. Also, the relationship between the different process variables and the hydrogels’ remediation (sorption) capacity was studied, while the generated experimental kinetic and equilibrium data were effectively modelled using relevant isotherm and kinetic models. The Langmuir isotherm and pseudo-first-order kinetic models fitted best to the equilibrium and kinetic data, respectively. By applying specified mechanistic models, the intraparticle diffusion mechanism was identified as the sole rate-limiting step of the sorption process. The hydrogel showed excellent water absorption and monolayer sorption capacities of 710 ±1.6 g water/g and 343.27 ±1.3 mg/g, respectively. Thus, the hydrogel shows potential for the decontamination of dyestuff polluted streams. |
topic |
Basic blue 9 dye Adsorption Hydrogel Corn starch Modelling |
url |
http://www.sciencedirect.com/science/article/pii/S2666893921001092 |
work_keys_str_mv |
AT chukwunonsooaniagor modellingofbasicblue9dyesorptionontohydrolyzedpolyacrylonitrilegraftedstarchcomposite AT maafifi modellingofbasicblue9dyesorptionontohydrolyzedpolyacrylonitrilegraftedstarchcomposite AT ahashem modellingofbasicblue9dyesorptionontohydrolyzedpolyacrylonitrilegraftedstarchcomposite |
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1721187553165443072 |