Kinetics and dynamic adsorption of methylene blue by CO2-activated resorcinol formaldehyde carbon gels

Faizal Azrul Nurfaiz Mohd; Halim Muhamad Hazim Abdul; Zaini Muhammad Abbas Ahmad

doi:10.1007/s42823-019-00046-8

Kinetics and dynamic adsorption of methylene blue by CO2-activated resorcinol formaldehyde carbon gels

Carbon Letters
Abbr : Carbon Lett.
2019, 29(4), pp.319-326
DOI : 10.1007/s42823-019-00046-8
Publisher : Korean Carbon Society
Research Area : Natural Science > Natural Science General > Other Natural Sciences General
Received : October 30, 2018
Accepted : May 25, 2019
Published : August 1, 2019

Faizal Azrul Nurfaiz Mohd ¹, Halim Muhamad Hazim Abdul ¹, Zaini Muhammad Abbas Ahmad ²

¹Faculty of Engineering
²Ibnu-Sina Institute for Scientific and Industrial Research

Accredited

ABSTRACT

The present work is aimed at evaluating the kinetics and dynamic adsorption of methylene blue by CO2-activated carbon gels. The carbon gels were characterized by textural properties, thermal degradation and surface chemistry. The result shows that the carbon gels are highly microporous with surface area of 514 m2/g and 745 m2/g for resorcinol-to-catalyst ratios of 1000 (AC1) and 2000 (AC2), respectively. The kinetics data could be described by pseudo-first-order model, with a longer duration to attain equilibrium due to restricted pore diffusion as concentration increases. Also, AC1 exhibits insignificant kinetics with fluctuating adsorption with time at concentrations of 20 and 25 mg/L. However, AC1 reveals a better performance than AC2 in dynamic adsorption due to concentration gradient for molecules diffusion to active sites. The applicability of Yoon–Nelson and Thomas models indicates that the dynamic adsorption is controlled by external and internal diffusion.

KEYWORDS

Adsorption Carbon gel CO2 activation Methylene blue

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Total Citation Counts(KCI+WOS) (11) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (15) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2024-10-01)

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Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 6.04

Kinetics and dynamic adsorption of methylene blue by CO2-activated resorcinol formaldehyde carbon gels

ABSTRACT

KEYWORDS

Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-28)

Total Citation Counts(KCI+WOS) (11) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (15) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2024-10-01)

* References for papers published after 2023 are currently being built.

Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 6.04

Kinetics and dynamic adsorption of methylene blue by CO2-activated resorcinol formaldehyde carbon gels

ABSTRACT

KEYWORDS

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KCI Citation Counts (1)

WoS Citation Counts (10) This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-28)

Total Citation Counts(KCI+WOS) (11) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (15) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2024-10-01)

REFERENCES (23) * References for papers published after 2023 are currently being built.

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This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-28)

* References for papers published after 2023 are currently being built.