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Cnicus Benedictus roots as a low-cost adsorbent for methylene blue dye removal from aqueous solution: kinetic and equilibrium studies.

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Title: Cnicus Benedictus roots as a low-cost adsorbent for methylene blue dye removal from aqueous solution: kinetic and equilibrium studies.
Authors: Gherbia, Abdelali1 (AUTHOR) abdelali98111@yahoo.fr
Source: Journal of Dispersion Science & Technology. 2026, Vol. 47 Issue 4, p696-708. 13p.
Subject Terms: *Sorbents, *Basic dyes, *Aqueous solutions, *Chemical kinetics, *Equilibrium, *Color removal (Sewage purification)
Abstract: In this research, Cnicus Benedictus roots powder (CBRP) was utilized as a low-cost adsorbent for removing methylene blue (MB) as a cationic dye from aqueous solution. Characterization of CBRP by Boehm titration method, Fourier transform infrared (FT-IR) and environmental scanning electron microscope (ESEM) indicates the presence of different types of functional groups and a very rough surface filled with cavities, suitable for MB adsorption. The effect of various parameters such as CBRP dose (0.2–2 g/1L), contact time (0–180 min), initial pH (1–10), coexisting anions/cations and the initial MB concentration (100–500 mg L−1) on MB adsorption were examined, the results showed that MB uptake depends on the pH of solution, the electrostatic attraction forces, the formation of H-bonds and π–π interactions are the possible CBRP–MB interaction mechanisms. Adsorption kinetic of MB on CBRP was best represented by linear and non-linear form of the pseudo-second order model. The experimental equilibrium data were best described by linear and non-linear forms of Langmuir and Redlich–Peterson isotherm models (R2> 0.98) with a maximum MB adsorption capacity of 85.47 mg g−1 at 25 °C, the adsorption efficiency R (%) was greater than 90 (%). MB adsorption-desorption experiments showed the reusability of CBRP for five consecutive cycles. According to the obtained results, CBRP can be used as a natural adsorbent material for cationic dyes removal from aqueous solution. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 191985816
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Cnicus Benedictus roots as a low-cost adsorbent for methylene blue dye removal from aqueous solution: kinetic and equilibrium studies.
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  Data: <searchLink fieldCode="AR" term="%22Gherbia%2C+Abdelali%22">Gherbia, Abdelali</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> abdelali98111@yahoo.fr</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Dispersion+Science+%26+Technology%22">Journal of Dispersion Science & Technology</searchLink>. 2026, Vol. 47 Issue 4, p696-708. 13p.
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  Data: *<searchLink fieldCode="DE" term="%22Sorbents%22">Sorbents</searchLink><br />*<searchLink fieldCode="DE" term="%22Basic+dyes%22">Basic dyes</searchLink><br />*<searchLink fieldCode="DE" term="%22Aqueous+solutions%22">Aqueous solutions</searchLink><br />*<searchLink fieldCode="DE" term="%22Chemical+kinetics%22">Chemical kinetics</searchLink><br />*<searchLink fieldCode="DE" term="%22Equilibrium%22">Equilibrium</searchLink><br />*<searchLink fieldCode="DE" term="%22Color+removal+%28Sewage+purification%29%22">Color removal (Sewage purification)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this research, Cnicus Benedictus roots powder (CBRP) was utilized as a low-cost adsorbent for removing methylene blue (MB) as a cationic dye from aqueous solution. Characterization of CBRP by Boehm titration method, Fourier transform infrared (FT-IR) and environmental scanning electron microscope (ESEM) indicates the presence of different types of functional groups and a very rough surface filled with cavities, suitable for MB adsorption. The effect of various parameters such as CBRP dose (0.2–2 g/1L), contact time (0–180 min), initial pH (1–10), coexisting anions/cations and the initial MB concentration (100–500 mg L−1) on MB adsorption were examined, the results showed that MB uptake depends on the pH of solution, the electrostatic attraction forces, the formation of H-bonds and π–π interactions are the possible CBRP–MB interaction mechanisms. Adsorption kinetic of MB on CBRP was best represented by linear and non-linear form of the pseudo-second order model. The experimental equilibrium data were best described by linear and non-linear forms of Langmuir and Redlich–Peterson isotherm models (R2> 0.98) with a maximum MB adsorption capacity of 85.47 mg g−1 at 25 °C, the adsorption efficiency R (%) was greater than 90 (%). MB adsorption-desorption experiments showed the reusability of CBRP for five consecutive cycles. According to the obtained results, CBRP can be used as a natural adsorbent material for cationic dyes removal from aqueous solution. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1080/01932691.2024.2420888
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 13
        StartPage: 696
    Subjects:
      – SubjectFull: Sorbents
        Type: general
      – SubjectFull: Basic dyes
        Type: general
      – SubjectFull: Aqueous solutions
        Type: general
      – SubjectFull: Chemical kinetics
        Type: general
      – SubjectFull: Equilibrium
        Type: general
      – SubjectFull: Color removal (Sewage purification)
        Type: general
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      – TitleFull: Cnicus Benedictus roots as a low-cost adsorbent for methylene blue dye removal from aqueous solution: kinetic and equilibrium studies.
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            – D: 01
              M: 03
              Text: 2026
              Type: published
              Y: 2026
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              Value: 01932691
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              Value: 47
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            – TitleFull: Journal of Dispersion Science & Technology
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