Kinetic Models on Chromium (VI) Adsorption onto Carbonized Oil Palm Kernel with Potassium Hydroxide Activation
Open accessAbstract
Use of adsorption kinetic models for removal of chromium (VI) from aqueous solution by oil palm kernel with potassium hydroxide activation has been investigated.The adsorption capacity or amount of Cr(VI) adsorbed per unit mass of adsorbent was determined by the pseudo-zero order, pseudo-first order, pseudosecond order, intraparticle diffusion, Bangham pore diffusion, liquid film diffusion, modified Freundlich and Elovich models to describe the adsorption process.The kinetics data were marginally better fit with Elovich model as compared to other models.It is therefore suggest that the chemisorption was the rate controlling step for chromium (VI) adsorption onto the carbonized oil palm kernel with KOH activation as the adsorbent.
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The deviation from the origin indicated some degree of boundary layer control.
“This indicated that there is some degree of boundary layer control and this further showed that the intra-particle diffusion was not only the rate-limiting step, but also be the rate controlling of sorption or that all may be operating simultaneously [15].”
From Equilibrium and Kinetic Studies for The Adsorptive Removal of Lead (II) Ions from Aqueous Solution Using Activated Plantain Peel Biochar (2020) · cites this paper as [15]
In the intraparticle-diffusion discussion (indexed under B.3; page not provided), the paper says plots that did not pass through the origin indicate that intraparticle diffusion was not the only rate-limiting step. It does not identify boundary-layer control as the other mechanism; the liquid-film diffusion discussion (indexed under B.5; page not provided) instead says the adsorption kinetics were not controlled by diffusion through the surrounding liquid film. (LLM, conf=0.87)
Experimental — accuracy not yet measuredIntra-particle diffusion was not only the rate-limiting step, but also may be rate controlling, or all mechanisms may operate simultaneously.
“This indicated that there is some degree of boundary layer control and this further showed that the intra-particle diffusion was not only the rate-limiting step, but also be the rate controlling of sorption or that all may be operating simultaneously [15].”
From Equilibrium and Kinetic Studies for The Adsorptive Removal of Lead (II) Ions from Aqueous Solution Using Activated Plantain Peel Biochar (2020) · cites this paper as [15]
The intraparticle-diffusion discussion (B.3/B.4; page unavailable) says intraparticle diffusion is not the only rate-limiting step and that another kinetic model may control adsorption. It does not say all mechanisms operate simultaneously. The liquid-film discussion (B.5/B.6; page unavailable) instead reports that adsorption is not controlled by diffusion through the surrounding liquid film, so it does not establish the sentence’s boundary-layer-control assertion. (LLM, conf=0.85)
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References 8 · Cited by 7
Research works printed but not linked: 2
- P. Sampranpiboon, and X. Feng, "Use of Phosphoric Acid and Sodium Hydroxide to Treat Carbonization Products of Oil Palm Kernel for Chromium (VI) Removal", in Proc. The 4th TIChE International Conference 2014, pp. 1-7.
- G.Varak, A. Demir, K. Yetimezsoy, S. Top, E. Sekman and M.S. Bilgili, "Removal of 4-nitrophenol from aqueous solution by natural low-cost adsorpbents", Indain Journal of Chemical Technology, vol.12, pp. 7-25, 2012.
- Venue
- International Journal of Advances in Chemical Engineering and Biological Sciences
- Publisher
- International Institute of Engineers
- Published
- 2016-04-30
- Volume
- 3
- Issue
- 1
- ISSN
- 2349-1507 (ISSN-L)
- 2349-1515
- OpenAlex
- W4240841938
- Cited by
- 7
- References
- 8
- Citations by year
- 2025: 2 · 2020: 3 · 2018: 1 · 2017: 1
- FWCI
- 0.40
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- International Journal of Advances in Chemical Engineering and Biological Sciences (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Chromium effects and bioremediation
- Keywords
- Cr(VI) adsorption, adsorption kinetics, KOH activation, biosorbent, Elovich model, chemisorption, heavy metal removal from water, modified Freundlich isotherm, intraparticle diffusion
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