Chromium (VI) adsorption from aqueous solution by prepared biochar from Onopordom Heteracanthom
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At low initial Cr(VI) concentration, fewer Cr(VI) ions are available at sorption sites, but increase in initial Cr(VI) concentration favors a strong sorptive interaction between Cr(VI) ions and active sorption sites until equilibrium.
“At low initial Cr(VI) concentration the number of Cr(VI) ions is less at available sites for sorption but increase in initial Cr(VI) concentration favored a strong sorptive interaction between ions of Cr(VI) and active sorption sites until at equilibrium state [44].”
From Adsorption-reduction performance of tea waste and rice husk biochars for Cr(VI) elimination from wastewater (2020) · cites this paper as [44]
In “Adsorption studies” (page unavailable), the paper reports that increasing initial Cr(VI) concentration increased adsorption capacity and could increase the driving force for transfer to the adsorbent. It does not say this produced a strong interaction with active sites until equilibrium; it also reports that the percentage adsorbed decreased as limited active sites became saturated. (LLM, conf=0.83)
Experimental — accuracy not yet measuredLower Temkin heat of sorption (b) values for Cr(VI) sorption by RHB and TWB indicate higher Cr(VI) coverage on the biosorbent surface.
“The lower heat of sorption (b) values for sorption of Cr(VI) by RHB and TWB were reported and higher Cr(VI) coverage on surface of biosorbents was indicated due to the decrease in value of (b) [44].”
From Adsorption-reduction performance of tea waste and rice husk biochars for Cr(VI) elimination from wastewater (2020) · cites this paper as [44]
The Temkin isotherm section (page unavailable) says that heat of adsorption decreases as surface coverage increases, supporting the general relationship. But this paper studies Cr(VI) adsorption by BCP, not RHB or TWB, and does not report lower Temkin b values or infer higher coverage for those biosorbents. (LLM, conf=0.86)
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“In aqueous solution a driving force is formed by the initial concentration of sorbate which helps in the transfer of Cr(VI) ions on the biosorbent surface thus effect of initial concentration of Cr(VI) is also a very important parameter [44].”
Influential
- Authors
- Ghorbani-Khosrowshahi, S., & Behnajady, M. A.
- Affiliations
- Islamic Azad University of Tabriz (IR)
- Corresponding author
- Behnajady, M. A.
- ORCID
- Behnajady, M. A.
- Venue
- International Journal of Environmental Science and Technology
- Published
- 2016-04-04
- Volume
- 13
- Issue
- 7
- Pages
- 1803-1814
- ISSN
- 1735-1472 (ISSN-L)
- 1735-2630
- OpenAlex
- W2337334741
- Cited by
- 82
- References
- 44
- Citations by year
- 2026: 3 · 2025: 11 · 2024: 10 · 2023: 6 · 2022: 8 · 2021: 9 · 2020: 9 · 2019: 11 · 2018: 8 · 2017: 7
- FWCI
- 5.14
- Type
- journal article
- Language
- en
- Open access
- green
- www.bioline.org.br
- Licence
- www.springer.com/tdm (tdm)
- Locations
- International Journal of Environmental Science and Technology (publishedVersion)
- Bioline International (Bioline International) (submittedVersion)
- Funders
- Islamic Azad University
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Chromium effects and bioremediation
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Keywords
- hexavalent chromium, Cr(VI) adsorption, biochar, weed biomass, heavy metal removal, adsorption isotherms, adsorption kinetics, Langmuir isotherm, pseudo-second-order kinetics, Weber-Morris model, intraparticle diffusion, wastewater treatment
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