Selective adsorption of methylene blue dye by a flocculation sludge-derived adsorbent prepared by carboxymethyl chitosan-based flocculants

Xia, Yuhan; Zhang, Shixin; Tang, Xiaomin; Yan, Bin; Zheng, Huaili

doi:10.1016/j.ijbiomac.2024.134997

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Cited by 2 publications

References 35 publications

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Preparation and adsorption performance of polyacryloyloxytrimethylammonium chloride-modified magnetic chitosan microspheres: a novel strategy for treating Cr(vi) ion-containing wastewater

Chen,

Zhu,

Pan

et al. 2025

New J. Chem.

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Preparation and adsorption performance of polyacryloyloxytrimethylammonium chloride-modified magnetic chitosan microspheres: a novel strategy for treating Cr(vi) ion-containing wastewater

Chen,

Zhu,

Pan

et al. 2025

New J. Chem.

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Statistical Physics Quantification of Steric, Energetic and Thermodynamic Adsorption Attributes of Methylene Blue onto Super-Adsorbent Hydrogel (NaSS-DMA monomers) for water detoxification

Aouaini,

Oueslati,

Naifar

et al. 2024

Preprint

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Through a statistical physics modeling approach, a detailed theoretical scrutiny was conducted utilizing four distinct models based on the grand canonical ensemble to fit the Methylene Blue adsorption isotherms onto NaSS-DMA hydrogel surface. Steriographic along with energetic-thermodynamic metrics have been inspected in response to combined effects of temperature and concentration. The uptake process was best described by a bimodal-energy linking monolayer scenario involving two sites and energies (𝜀1 = 15.73 kJ/mol and 𝜀2 = 17.85 kJ/mol) characterized by a multi-molecule adsorption process (n1 = 8.383 and n2 = 2.5967) at T = 295 K. Steriographic discussion revealed that the position of the adsorbate is non-parallel but a larger number of entities can be anchored in the same receptor site. The docking reaction is exothermic and when the concentration exceeds 95 mg/L, the adsorbed amount decreases significantly in response to incremented heat conditions. More importantly, the investigated linking process is primarily driven by weak van der Waals forces (energies below 45 kJ/mol) while the negative values of Gibbs free energy validated its spontaneity. These outcomes supported the development of a robust mathematical framework that accurately predicts removal efficiencies of Methylene Blue onto NaSS-DMA hydrogel surface providing a deeper understanding of the involved nanoscale surface linking.

show abstract

Selective adsorption of methylene blue dye by a flocculation sludge-derived adsorbent prepared by carboxymethyl chitosan-based flocculants

Cited by 2 publications

References 35 publications

Preparation and adsorption performance of polyacryloyloxytrimethylammonium chloride-modified magnetic chitosan microspheres: a novel strategy for treating Cr(vi) ion-containing wastewater

Preparation and adsorption performance of polyacryloyloxytrimethylammonium chloride-modified magnetic chitosan microspheres: a novel strategy for treating Cr(vi) ion-containing wastewater

Statistical Physics Quantification of Steric, Energetic and Thermodynamic Adsorption Attributes of Methylene Blue onto Super-Adsorbent Hydrogel (NaSS-DMA monomers) for water detoxification

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