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Absorbent cotton-templated manganese oxide nanocomposites for methylene blue promote isothermal adsorption

The public is still concerned about the effectiveness and efficiency of wastewater treatment. Investigating a better material to contribute to water purification is the objective of this research. Absorbent cotton-templated manganese oxide nanocomposites (AC/MnO2) were facilely synthesized by immers...

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Main Authors: Wu, J., Wang, Q., Wu, W., Khor, Sook Mei
Format: Article
Published: Institute for Ionics 2024
Subjects:
QD Chemistry
Online Access:http://eprints.um.edu.my/44998/
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spelling my.um.eprints.449982024-04-16T01:55:46Z http://eprints.um.edu.my/44998/ Absorbent cotton-templated manganese oxide nanocomposites for methylene blue promote isothermal adsorption Wu, J. Wang, Q. Wu, W. Khor, Sook Mei QD Chemistry The public is still concerned about the effectiveness and efficiency of wastewater treatment. Investigating a better material to contribute to water purification is the objective of this research. Absorbent cotton-templated manganese oxide nanocomposites (AC/MnO2) were facilely synthesized by immersing adsorbent cotton into a potassium permanganate (KMnO4) solution through an in situ reduction with a biological template strategy. AC/MnO2 is attracted to hydration hydroxyl in aqueous solutions and has an excellent adsorption capacity for dye wastewater degradation in aqueous solutions. The morphology, structure, composition, and thermostability of AC/MnO2 were characterized by FE-SEM, XPS, XRD, FTIR, and TGA. This as-prepared nanomaterial was applied to degrade methylene blue. The factors that affected the degradation performance, including soaking time, initial methylene blue concentration, the amount of AC/MnO2, pH, and temperature, were investigated. The experiments indicated that the optimal conditions for adsorption were achieved at pH 5 using three wads of AC/MnO2 in 15 min, which were synthesized by soaking for 60 h. The isothermal adsorption behavior and kinetics were studied by measuring the absorbance intensities in reaction time to fit Langmuir and Freundlich's adsorption isotherms, pseudo-first-order kinetic models, and pseudo-second-order kinetic models. The correlation coefficient comparisons demonstrated that methylene blue degradation conformed to the Langmuir isotherm, indicating that the superficial behavior was like the monolayer and pseudo-second-order models, elucidating that this process contained both physical diffusion and chemical adsorption. The regeneration capability was assessed to demonstrate that AC/MnO2 can be recycled. The degradation in efficiency persisted at about 40 after five cycles. © 2023, The Author(s) under exclusive licence to Iranian Society of Environmentalists (IRSEN) and Science and Research Branch, Islamic Azad University. Institute for Ionics 2024 Article PeerReviewed Wu, J. and Wang, Q. and Wu, W. and Khor, Sook Mei (2024) Absorbent cotton-templated manganese oxide nanocomposites for methylene blue promote isothermal adsorption. International Journal of Environmental Science and Technology, 21 (1). 417 – 430. ISSN 1735-1472, DOI https://doi.org/10.1007/s13762-023-04983-w <https://doi.org/10.1007/s13762-023-04983-w>. 10.1007/s13762-023-04983-w
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QD Chemistry
spellingShingle QD Chemistry
Wu, J.
Wang, Q.
Wu, W.
Khor, Sook Mei
Absorbent cotton-templated manganese oxide nanocomposites for methylene blue promote isothermal adsorption
description The public is still concerned about the effectiveness and efficiency of wastewater treatment. Investigating a better material to contribute to water purification is the objective of this research. Absorbent cotton-templated manganese oxide nanocomposites (AC/MnO2) were facilely synthesized by immersing adsorbent cotton into a potassium permanganate (KMnO4) solution through an in situ reduction with a biological template strategy. AC/MnO2 is attracted to hydration hydroxyl in aqueous solutions and has an excellent adsorption capacity for dye wastewater degradation in aqueous solutions. The morphology, structure, composition, and thermostability of AC/MnO2 were characterized by FE-SEM, XPS, XRD, FTIR, and TGA. This as-prepared nanomaterial was applied to degrade methylene blue. The factors that affected the degradation performance, including soaking time, initial methylene blue concentration, the amount of AC/MnO2, pH, and temperature, were investigated. The experiments indicated that the optimal conditions for adsorption were achieved at pH 5 using three wads of AC/MnO2 in 15 min, which were synthesized by soaking for 60 h. The isothermal adsorption behavior and kinetics were studied by measuring the absorbance intensities in reaction time to fit Langmuir and Freundlich's adsorption isotherms, pseudo-first-order kinetic models, and pseudo-second-order kinetic models. The correlation coefficient comparisons demonstrated that methylene blue degradation conformed to the Langmuir isotherm, indicating that the superficial behavior was like the monolayer and pseudo-second-order models, elucidating that this process contained both physical diffusion and chemical adsorption. The regeneration capability was assessed to demonstrate that AC/MnO2 can be recycled. The degradation in efficiency persisted at about 40 after five cycles. © 2023, The Author(s) under exclusive licence to Iranian Society of Environmentalists (IRSEN) and Science and Research Branch, Islamic Azad University.
format Article
author Wu, J.
Wang, Q.
Wu, W.
Khor, Sook Mei
author_facet Wu, J.
Wang, Q.
Wu, W.
Khor, Sook Mei
author_sort Wu, J.
title Absorbent cotton-templated manganese oxide nanocomposites for methylene blue promote isothermal adsorption
title_short Absorbent cotton-templated manganese oxide nanocomposites for methylene blue promote isothermal adsorption
title_full Absorbent cotton-templated manganese oxide nanocomposites for methylene blue promote isothermal adsorption
title_fullStr Absorbent cotton-templated manganese oxide nanocomposites for methylene blue promote isothermal adsorption
title_full_unstemmed Absorbent cotton-templated manganese oxide nanocomposites for methylene blue promote isothermal adsorption
title_sort absorbent cotton-templated manganese oxide nanocomposites for methylene blue promote isothermal adsorption
publisher Institute for Ionics
publishDate 2024
url http://eprints.um.edu.my/44998/
_version_ 1797906867194691584
score 13.211869

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