Insights into kinetics and equilibrium of methylene blue adsorption onto β-cyclodextrin polymers
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Azrul Nurfaiz Mohd Faizal
Abstract
The exclusive properties of β-cyclodextrin (β-CD) combined with its harmless characters making it as an interesting and potential carbon adsorbent for water pollutants removal via adsorption. This work was aimed at evaluating the kinetics and isotherm parameters of methylene blue dye adsorption onto β-CD polymers. The carbon polymers were prepared by citric acid cross-linking, followed by post-treatment with sodium p-toluenesulfinate. The adsorbents were characterized using TGA, BET and FTIR. The adsorption of methylene blue was studied at varying concentrations (5–300 mg/L) and contact times (10–2880 min), and the kinetics and isotherm models were employed to describe the adsorption data. The post-treated carbon polymer exhibits a greater specific surface of 16.6 m2/g. The maximum adsorption of methylene blue by cross-linked and post-treated β-CD adsorbents are 263 and 227 mg/g, respectively. The kinetics data fitted well into pseudo-first order model, indicating physical adsorption. The Boyd’s model showed that film diffusion may be the controlling mechanism. The equilibrium data of methylene blue adsorption for the two β-CD polymers obeyed Langmuir model. To conclude, β-CD is a promising adsorbent candidate for the treatment of dye wastewater.
Funding source: UTM
Award Identifier / Grant number: 09G54
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Author contribution: ANM Faizal (PhD candidate): Conceptualization, experimental work, analysis, first draft. MAC Yunus (Professor): Supervision, methodology, review. Asmadi Ali (Associate Professor): Review, analysis, validation, proof. MAA Zaini (Associate Professor): Grant recipient, supervision, conceptualization, validation.
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Research funding: This work was funded by UTM-ICONIC Grant No. 09G54.
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Conflict of interest statement: All authors declare that they have no competing interests.
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Availability of data and material: Data will be made available upon request.
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© 2022 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Articles
- Size-dependent growth kinetics model for potassium chloride from seeded chloride solution
- Insights into kinetics and equilibrium of methylene blue adsorption onto β-cyclodextrin polymers
- Development of a new rotating photocatalytic reactor for the degradation of hazardous pollutants
- Promotional effects of cerium and titanium on NiMn2O4 for selective catalytic reduction of NO by NH3
- Sliding mode controller design based on simple closed loop set point experiment for higher order processes with dead time
- Performance evaluation of adaptive based model predictive control for ethylene glycol production from dimethyl oxide hydrogenation
- Experimental study on the combustion characteristics of blends of sugarcane bagasse, Nanning meager-lean coal and petroleum coke
- Ammoniacal leaching behavior and regularity of zinc ash
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Articles in the same Issue
- Frontmatter
- Articles
- Size-dependent growth kinetics model for potassium chloride from seeded chloride solution
- Insights into kinetics and equilibrium of methylene blue adsorption onto β-cyclodextrin polymers
- Development of a new rotating photocatalytic reactor for the degradation of hazardous pollutants
- Promotional effects of cerium and titanium on NiMn2O4 for selective catalytic reduction of NO by NH3
- Sliding mode controller design based on simple closed loop set point experiment for higher order processes with dead time
- Performance evaluation of adaptive based model predictive control for ethylene glycol production from dimethyl oxide hydrogenation
- Experimental study on the combustion characteristics of blends of sugarcane bagasse, Nanning meager-lean coal and petroleum coke
- Ammoniacal leaching behavior and regularity of zinc ash
- Enhanced dual-DOF PI-PD control of integrating-type chemical processes
