Adsorptive removal of arsenic from drinking water using KOH-modified sewage sludge-derived biochar

Cleaner Water, Год журнала: 2024, Номер 2, С. 100022 - 100022

Опубликована: Июнь 18, 2024

This paper reveals a green chemistry approach to remove arsenic (As+3) from water using potassium hydroxide (KOH) modified sewage sludge-derived biochar (SSDB-KOH). Characterisation of the morphology, particle size and composition SSDB-KOH pre- post-adsorption confirmed porous heterogenous surface favouring adsorption. At ambient temperature (20 °C), dose 20 g/l achieved 98 % arsenite removal at nearly neutral solution pH (8). compared favourably with pristine SSDB, where performance was limited 41.6 removal. The enhanced adsorption informed by several mechanisms, including ionic interactions, pore filling metal-pi interactions. experimental data fits closely Langmuir isotherm pseudo-second-order kinetic models, revealing monolayer chemical interaction between adsorbents adsorbate. spontaneous endothermic nature process negative value ΔG positive ΔH, respectively. evaluated for four-cycle regeneration. Finally, cost analysis performed demonstrate economic feasibility water.

Язык: Английский

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Sequential novel use of Moringa oleifera Lam., biochar, and sand to remove turbidity, E. coli, and heavy metals from drinking water

Cleaner Water, Год журнала: 2024, Номер unknown, С. 100050 - 100050

Опубликована: Окт. 1, 2024

Язык: Английский

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Synthesis and characterisation of novel beta-cyclodextrin based Fe ₃ O ₄ nanocomposite: adsorption behaviour and photocatalytic dye degradation studies

International Journal of Environmental & Analytical Chemistry, Год журнала: 2024, Номер unknown, С. 1 - 26

Опубликована: Июль 5, 2024

Novel Beta-Cyclodextrin-based Fe3O4 nanocomposite has been synthesised through copolymerisation by incorporating nanoparticles into the polymer matrix. Ultraviolet-Visible (UV-Visible) spectroscopy, Fourier transform infrared (FTIR) Thermogravimetric (TGA) analysis, Point of Zero Charge, X-ray diffraction (XRD), and Scanning electron microscopy (SEM) analysis have used to characterise Nanoparticles β-CDHs@Fe3O4 nanocomposite. The utilised for adsorption methylene blue (MB) dye from aqueous solutions. maximum percentage removal MB at optimum pH 7 was found be 98.51%. capacity (qe) 268.09 mg/g dosages 1.2 g/L, 7, temperature 25°C, concentration 100 mg/L an agitation speed 200 rpm. Adsorption data fitted with three isotherm models namely Langmuir, Freundlich, Temkin, it best fit Langmuir model. Kinetic studies like pseudo-first order, pseudo-second intra-particle diffusion model were also performed study mechanism. Further, thermodynamic demonstrate that reaction exothermic spontaneous. Photocatalytic degradation under visible light studied, 79.01% observed. Also, desorption performed, reusable up 5 times 90% dye-desorption in fifth cycle.

Язык: Английский

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Transforming waste polyethylene terephthalate (PET) into high-performance activated carbon-supported composites for pollutant degradation: A synergy of experiments and DFT insights

Carbon, Год журнала: 2025, Номер 234, С. 120001 - 120001

Опубликована: Янв. 9, 2025

Язык: Английский

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ANN-assisted comprehensive screening of silica gel-alunite composite sorbent system for efficient adsorption of toxic nickel ions: Batch and continuous mode water treatment applications

Chemosphere, Год журнала: 2025, Номер 373, С. 144127 - 144127

Опубликована: Янв. 31, 2025

Язык: Английский

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Synthesis of Copper-Impregnated MCM-41 from Synthetic and Rice Husk-Derived Silica for Efficient Adsorption of Levofloxacin: A Machine Learning Approach

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 115634 - 115634

Опубликована: Янв. 1, 2025

Язык: Английский

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Magnetic Hybrid Chitin-Horse Manure Humic Acid for Optimized Cd(II) and Pb(II) Adsorption from Aquatic Environment

Case Studies in Chemical and Environmental Engineering, Год журнала: 2025, Номер unknown, С. 101138 - 101138

Опубликована: Фев. 1, 2025

Язык: Английский

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A crossbred mesoporous composite of Ni0.15-doped Zn0.85S @ alginate-derived graphitic carbon beads for methylene blue removal: DFT and machine learning investigations

Inorganic Chemistry Communications, Год журнала: 2025, Номер unknown, С. 114043 - 114043

Опубликована: Фев. 1, 2025

Язык: Английский

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Multilayer adsorption of reactive orange 16 dye onto Fe₂O₃/ZnO hybrid nanoadsorbent: mechanistic insights from kinetics, isotherms and dynamic light scattering studies

Journal of Chemical Technology & Biotechnology, Год журнала: 2024, Номер 100(1), С. 50 - 66

Опубликована: Сен. 12, 2024

Abstract BACKGROUND Fe 2 O 3 /ZnO hybrid nanoadsorbent was synthesized by the coprecipitation method and characterized. The hydrodynamic size stability of were investigated in batch adsorption toxic Reactive orange (RO)16 dye at increasing concentrations. mechanism monolayer multilayer elucidated for first time together through dynamic light scattering (DLS), isotherm, kinetic thermodynamic studies. A tomato seed germination assay performed to confirm material treated water toxicity. RESULTS ferromagnetic exhibited 85% RO16 removal. Nonlinear fitting isotherm models suggest chemisorption (monolayer) physisorption (multilayer) over heterogeneous surface nanoadsorbent, respectively, lower higher concentration dye. In line with these mechanistic insights, DLS studies demonstrate that increased up 100 mg L −1 face‐off binding molecules, whereas 100–500 range; besides increase capacity, did not magnify owing face‐on multiple molecule stacking. Zeta potential data confirmed greater solution pH large size. Thermodynamic suggested endothermic spontaneous process primarily controlled physical toxicity proved are environmentally safe. CONCLUSION DLS, complex a heterogenous nanoadsorbent. It found chemisorptive molecules physisorptive affect size; rather, it remained stable concentration. © 2024 Society Chemical Industry (SCI).

Язык: Английский

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Coconut shell-derived biocarbon composite for adsorptive field-water purification.

Materials Chemistry and Physics, Год журнала: 2025, Номер 333, С. 130359 - 130359

Опубликована: Янв. 5, 2025

Язык: Английский

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