본문 바로가기
  • Home

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.

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 2023-07-14)

Total Citation Counts(KCI+WOS) (8) 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 (11) 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 2023-10-01)

* References for papers published after 2022 are currently being built.