Adsorptive Removal of CD (II) Using Activated Carbon Prepared from Bark of Ficusracemosa

Gour, K; D, Donadkar; Rahangdale, P. K.

doi:10.1088/1757-899x/410/1/012013

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…According to their findings, Cr(VI) adsorption followed the Langmuir model. Gour et al [44] . reported a parallel finding for Cd(II) onto AC made from fig peel.…”

Section: Resultsmentioning

confidence: 84%

Highly Porous Carbon Materials Prepared Through KOH‐Assisted CO₂‐Activation of Carbonized Waste Tires for Removal of Cr(VI) and Cd(II) from Water

Ahi,

Roshanravan,

Younesi

et al. 2024

ChemistrySelect

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In this study, waste tires (WTs) were carbonized under an N2 atmosphere. Subsequently, KOH/WTs‐char with KOH‐assisted CO2 activation was used to prepare activated carbon (AC) as a highly porous carbon material for the removal of Cr(VI) and Cd(II) from water. Various techniques such as elemental analysis, Fourier‐transform infrared spectroscopy, scanning electron microscopy, and N2 adsorption/desorption were employed to investigate the physical and chemical characteristics of the prepared carbons. The WTs‐char activated with KOH under CO2 exhibited a microstructure with a high BET surface area and pore volume of 1841 m2/g and 0.869 cm3/g, respectively, demonstrating excellent adsorbent performance. The maximum removal efficiencies of 99.91 % for Cd(II) and 99.81 % for Cr(VI) were achieved using AC2 carbon under the following conditions: pH 2 for Cr(VI) and pH 5 for Cd(II), contact time of 120 min, adsorbent dose of 0.4 g/100 mL, and temperature of 298 K. The adsorption kinetics followed the pseudo‐second‐order equation, and the equilibrium data fit well with the Redlich–Peterson isotherm equation. The positive values of ▵G indicated that the uptake process for both ions was nonspontaneous and nonfeasible over the temperature studied. Both ions showed negative values of ΔH and ΔS on carbon, suggesting exothermic adsorption and a decrease in disorder. Regeneration studies showed that NaOH was a better desorbing agent than HCl. Cr(VI) desorption resulted in over 90 % removal recovery by AC2 using 1.0 M NaOH even after the fifth cycle. However, the low activation energy indicated that the adsorption was favorable kinetically. Overall, this study demonstrated the effective preparation of highly porous carbon and its successful performance in removing Cr(VI) and Cd(II) ions.

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“…According to their findings, Cr(VI) adsorption followed the Langmuir model. Gour et al [44] . reported a parallel finding for Cd(II) onto AC made from fig peel.…”

Section: Resultsmentioning

confidence: 84%

Highly Porous Carbon Materials Prepared Through KOH‐Assisted CO₂‐Activation of Carbonized Waste Tires for Removal of Cr(VI) and Cd(II) from Water

Ahi,

Roshanravan,

Younesi

et al. 2024

ChemistrySelect

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show abstract

“…According to their findings, Cr(VI) adsorption followed the Langmuir model. Gour et al [39] reported a parallel finding for Cd(II) onto AC made from fig peel.…”

Section: Equilibrium Isothermsmentioning

confidence: 80%

Emerging highly porous activated carbon by pyrolysis-KOH chemical simultaneous-CO2 physical activation of waste tires for Cr(VI) and Cd(II) removal

Ahi,

Roshanravan,

Younesi

et al. 2023

Preprint

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In this work, waste tires (WTs) were carbonized under an N2 atmosphere, and then KOH/WTs-char with KOH assisted-CO2 activation was used to prepare activated carbon (AC) as an emerging highly porous carbon to remove Cr(VI) and Cd(II) from a water media. Several techniques, including elemental analysis, Fourier-transform infrared spectroscopy, scanning electron microscopy, and N2 adsorption/desorption techniques, were operated to explore the physical and chemical features of the as-prepared carbons. The WTs-char activated with KOH under CO2 displayed a microstructure with a high BET surface area and pore volume of 1841 m2/g and 0.869 cm3/g, respectively, that exhibited excellent adsorbent performance. Adsorption kinetics was well-matched with the pseudo-second-order equation, and all equilibria were well-matched with the Redlich-Peterson isotherm equation. The positive values of ∆Go confirmed that the uptake process of both ions was nonspontaneous and that feasibility increased with increasing temperatures. The negative values of ΔH° and ΔS° were attained for both ions on carbon, revealing the exothermic nature of the adsorption and disorder decrease. However, the small activation energy revealed that the adsorption was kinetically favored. This study demonstrated the preparation of emerging carbon by effectively high pore structures and the adsorption performance of the carbons on Cr(VI) and Cd(II) ions.

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Adsorptive Removal of CD (II) Using Activated Carbon Prepared from Bark of Ficusracemosa

Cited by 2 publications

References 6 publications

Highly Porous Carbon Materials Prepared Through KOH‐Assisted CO₂‐Activation of Carbonized Waste Tires for Removal of Cr(VI) and Cd(II) from Water

Highly Porous Carbon Materials Prepared Through KOH‐Assisted CO₂‐Activation of Carbonized Waste Tires for Removal of Cr(VI) and Cd(II) from Water

Emerging highly porous activated carbon by pyrolysis-KOH chemical simultaneous-CO2 physical activation of waste tires for Cr(VI) and Cd(II) removal

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Adsorptive Removal of CD (II) Using Activated Carbon Prepared from Bark of Ficusracemosa

Cited by 2 publications

References 6 publications

Highly Porous Carbon Materials Prepared Through KOH‐Assisted CO2‐Activation of Carbonized Waste Tires for Removal of Cr(VI) and Cd(II) from Water

Highly Porous Carbon Materials Prepared Through KOH‐Assisted CO2‐Activation of Carbonized Waste Tires for Removal of Cr(VI) and Cd(II) from Water

Emerging highly porous activated carbon by pyrolysis-KOH chemical simultaneous-CO2 physical activation of waste tires for Cr(VI) and Cd(II) removal

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Product

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About

Highly Porous Carbon Materials Prepared Through KOH‐Assisted CO₂‐Activation of Carbonized Waste Tires for Removal of Cr(VI) and Cd(II) from Water

Highly Porous Carbon Materials Prepared Through KOH‐Assisted CO₂‐Activation of Carbonized Waste Tires for Removal of Cr(VI) and Cd(II) from Water