Sequestration of an azo dye by a potential biosorbent: characterization of biosorbent, adsorption isotherm and adsorption kinetic studies (2024)

Gaur, B., Mittal, J., Shah, S. A., Mittal, A. (2024). Sequestration of an azo dye by a potential biosorbent: characterization of biosorbent, adsorption isotherm and adsorption kinetic studies. Molecules, 29(10), Article 2387. https://doi.org/10.3390/molecules29102387

Gaur, Bharti ; Mittal, Jyoti ; Shah, Syed A. et al. / Sequestration of an azo dye by a potential biosorbent : characterization of biosorbent, adsorption isotherm and adsorption kinetic studies. In: Molecules. 2024 ; Vol. 29, No. 10.

@article{2643b7bebc244075ab82605991972717,

title = "Sequestration of an azo dye by a potential biosorbent: characterization of biosorbent, adsorption isotherm and adsorption kinetic studies",

abstract = "This study explores the detailed characterization of a biosorbent (Hen Feather) and its efficient use in eradicating the azo dye Metanil Yellow (MY) from its aqueous solutions. Effects of a range of experimental parameters, including pH, initial dye concentration, biosorbent dosage and contact time on the adsorption, were studied. A detailed physical and chemical characterization of the biosorbent was made using SEM, XRD, XPS and FTIR. During the optimization of adsorption parameters, the highest dye uptake of almost 99% was recorded at pH 2, dye concentration 2 × 10−5 M, 0.05 g of biosorbent and a contact period of 75 min. Various adsorption isotherm models were studied to gather different adsorption and thermodynamic parameters. The linearity of the Langmuir, Freundlich and D-R adsorption isotherms indicate hom*ogeneous, multilayer chemisorption with high adsorption affinity between the dye and biosorbent. Values of the changes in the Gibbs free energy (ΔG°) and the enthalpy (ΔH°) of the adsorption process have been calculated, these values indicate that it is a spontaneous and endothermic process. Kinetics of the adsorption were also measured, and it was established that the adsorption of MY over Hen Feather follows a pseudo-second-order kinetic model at temperatures 30, 40 and 50 °C. The findings of this investigation clearly indicate that the studied biosorbent exhibits a high affinity towards the dye (MY), and it can be effectively, economically and efficiently used to sequestrate and eradicate MY from its aqueous solutions.",

keywords = "Hen feather, Metanil yellow, Adsorption isotherm, Adsorption kinetics, Thermodynamics",

author = "Bharti Gaur and Jyoti Mittal and Shah, {Syed A.} and Alok Mittal and Baker, {Richard T.}",

note = "Funding: Ministry of Human Resource Development (Presently Ministry of Education) of the Government of India via the SPARC initiative (project: SPARC/2018-2019/P307/SL).",

year = "2024",

month = may,

day = "19",

doi = "10.3390/molecules29102387",

language = "English",

volume = "29",

journal = "Molecules",

issn = "1420-3049",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "10",

}

Gaur, B, Mittal, J, Shah, SA, Mittal, A 2024, 'Sequestration of an azo dye by a potential biosorbent: characterization of biosorbent, adsorption isotherm and adsorption kinetic studies', Molecules, vol. 29, no. 10, 2387. https://doi.org/10.3390/molecules29102387

Sequestration of an azo dye by a potential biosorbent: characterization of biosorbent, adsorption isotherm and adsorption kinetic studies. / Gaur, Bharti; Mittal, Jyoti; Shah, Syed A. et al.
In: Molecules, Vol. 29, No. 10, 2387, 19.05.2024.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Sequestration of an azo dye by a potential biosorbent

T2 - characterization of biosorbent, adsorption isotherm and adsorption kinetic studies

AU - Gaur, Bharti

AU - Mittal, Jyoti

AU - Shah, Syed A.

AU - Mittal, Alok

AU - Baker, Richard T.

N1 - Funding: Ministry of Human Resource Development (Presently Ministry of Education) of the Government of India via the SPARC initiative (project: SPARC/2018-2019/P307/SL).

PY - 2024/5/19

Y1 - 2024/5/19

N2 - This study explores the detailed characterization of a biosorbent (Hen Feather) and its efficient use in eradicating the azo dye Metanil Yellow (MY) from its aqueous solutions. Effects of a range of experimental parameters, including pH, initial dye concentration, biosorbent dosage and contact time on the adsorption, were studied. A detailed physical and chemical characterization of the biosorbent was made using SEM, XRD, XPS and FTIR. During the optimization of adsorption parameters, the highest dye uptake of almost 99% was recorded at pH 2, dye concentration 2 × 10−5 M, 0.05 g of biosorbent and a contact period of 75 min. Various adsorption isotherm models were studied to gather different adsorption and thermodynamic parameters. The linearity of the Langmuir, Freundlich and D-R adsorption isotherms indicate hom*ogeneous, multilayer chemisorption with high adsorption affinity between the dye and biosorbent. Values of the changes in the Gibbs free energy (ΔG°) and the enthalpy (ΔH°) of the adsorption process have been calculated, these values indicate that it is a spontaneous and endothermic process. Kinetics of the adsorption were also measured, and it was established that the adsorption of MY over Hen Feather follows a pseudo-second-order kinetic model at temperatures 30, 40 and 50 °C. The findings of this investigation clearly indicate that the studied biosorbent exhibits a high affinity towards the dye (MY), and it can be effectively, economically and efficiently used to sequestrate and eradicate MY from its aqueous solutions.

AB - This study explores the detailed characterization of a biosorbent (Hen Feather) and its efficient use in eradicating the azo dye Metanil Yellow (MY) from its aqueous solutions. Effects of a range of experimental parameters, including pH, initial dye concentration, biosorbent dosage and contact time on the adsorption, were studied. A detailed physical and chemical characterization of the biosorbent was made using SEM, XRD, XPS and FTIR. During the optimization of adsorption parameters, the highest dye uptake of almost 99% was recorded at pH 2, dye concentration 2 × 10−5 M, 0.05 g of biosorbent and a contact period of 75 min. Various adsorption isotherm models were studied to gather different adsorption and thermodynamic parameters. The linearity of the Langmuir, Freundlich and D-R adsorption isotherms indicate hom*ogeneous, multilayer chemisorption with high adsorption affinity between the dye and biosorbent. Values of the changes in the Gibbs free energy (ΔG°) and the enthalpy (ΔH°) of the adsorption process have been calculated, these values indicate that it is a spontaneous and endothermic process. Kinetics of the adsorption were also measured, and it was established that the adsorption of MY over Hen Feather follows a pseudo-second-order kinetic model at temperatures 30, 40 and 50 °C. The findings of this investigation clearly indicate that the studied biosorbent exhibits a high affinity towards the dye (MY), and it can be effectively, economically and efficiently used to sequestrate and eradicate MY from its aqueous solutions.

KW - Hen feather

KW - Metanil yellow

KW - Adsorption isotherm

KW - Adsorption kinetics

KW - Thermodynamics

U2 - 10.3390/molecules29102387

DO - 10.3390/molecules29102387

M3 - Article

SN - 1420-3049

VL - 29

JO - Molecules

JF - Molecules

IS - 10

M1 - 2387

ER -

Gaur B, Mittal J, Shah SA, Mittal A, Baker RT. Sequestration of an azo dye by a potential biosorbent: characterization of biosorbent, adsorption isotherm and adsorption kinetic studies. Molecules. 2024 May 19;29(10):2387. doi: 10.3390/molecules29102387