Preparation polymer-grafted magnetic starch adsorption material St/Fe3O4-g-p(GMA-r-HEMA) used for removal of heavy metals

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2024, Volume and Issue: 685, P. 133255 - 133255

Published: Jan. 21, 2024

Language: Английский

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Copper(II) ion removal from aqueous solutions using alginate nanoparticles/ carboxymethyl cellulose/ polyethylene glycol ternary blend: Characterization, isotherm and kinetic studies

Polymer Testing, Journal Year: 2024, Volume and Issue: 130, P. 108321 - 108321

Published: Jan. 1, 2024

This study addresses the critical issue of removing copper(II) ions from water using an eco-friendly approach with natural biomaterials. Alginate, a polysaccharide, is employed as primary adsorption material. The involves conversion alginate into nanoparticles, and ternary blend prepared by mixing nanoparticles carboxymethyl cellulose polyethylene glycol (AL-NPs/CMC/PEG). blend's morphological structural transformations have been comprehensively investigated techniques such DLS, FT-IR, XRD, TGA, SEM. Batch experiments were conducted systematically to investigate crucial parameters, contact time (60–300 min), initial copper concentration (62.5 ppm–1000 ppm), solution pH (2–8), adsorbent dosage (1–5 g). results obtained are highly encouraging, revealing impressive 80.9 % efficiency in removal ions. acquired experimental data then subjected analysis Langmuir Freundlich, isotherm, well pseudo-first pseudo-second-order kinetics studies. outcomes these isotherm models indicated favorable fit Freundlich suggesting strong affinity between metal Furthermore, kinetic studies revealed that process closely adheres kinetics, underlining reliability process. From desorption studies, 0.1 M HCl was extremely effective eluant when compared HNO3 EDTA. It could be reused three appreciate efficiency. research underscores potential for environmentally sustainable address persistent environmental challenge posed ion contamination.

Language: Английский

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Sodium alginate-encapsulated nano-iron oxide coupled with copper-based MOFs (Cu-BTC@Alg/Fe3O4): Versatile composites for eco-friendly and effective elimination of Rhodamine B dye in wastewater purification

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 274, P. 133498 - 133498

Published: June 27, 2024

Language: Английский

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Removal of methylene blue dye from water with Fe3O4/poly(HEMA-co-AMPS) magnetic hydrogels

Results in Chemistry, Journal Year: 2024, Volume and Issue: 7, P. 101454 - 101454

Published: Jan. 1, 2024

In this research, a novel magnetic hydrogel (MHG) adsorbent based on Fe3O4/poly(2-hydroxyethylmethacrylate-co-2-acrylamido-2-methylpropanesulfonic acid) Fe3O4/poly(HEMA-co-AMPS) was synthesized by in situ co-precipitation of Fe3O4 particles inside poly(HEMA-co-AMPS) hydrogels. This used to adsorb the organic cationic dye methylene blue (MB) from aqueous solutions. The properties were characterized FT-IR, TGA, XRD, VSM, and EDX-SEM techniques. degree swelling recorded water, acidic medium (HCl 0.01 M), basic (NaOH M). results confirmed that successfully within structure. Magnetic hydrogels have higher reach equilibrium faster than prepared with 3 % crosslinker 10 AMPS (MHG3(10)) showed better potential remove MB dye, adsorption capacity Qmax = 445.35 mg/g, obtained under best conditions at pH 6.5, dose 1 g/L, contact time min. Over test pHpzc, surface MHG3(10) is predominantly negative values 2.47. process for removal follows Langmuir model obeys pseudo-second-order kinetics. addition, thermodynamic studies performed show endothermic (ΔH0 75.946 kJ/mol) spontaneous positive value entropy (ΔS0 263.562 J/mol·K). Regeneration experiments can be reused several times as its efficiency still 94 after adsorption–desorption cycles. Therefore, proved promising pollutant media.

Language: Английский

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Sodium alginate based adsorbent: Facile fabrication, extraordinary removal efficacy of anionic dyes and adsorption mechanism

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 272, P. 132842 - 132842

Published: June 1, 2024

Language: Английский

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Functionalization strategy of carboxymethyl cotton gauze fabrics with zeolitic imidazolate framework-67 (ZIF-67) as a recyclable material for biomedical applications

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 279, P. 135148 - 135148

Published: Aug. 28, 2024

Language: Английский

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Defluorination of water solutions and glass industry wastewater using a magnetic pineapple hydrochar nanocomposite modified with a covalent organic framework

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 377, P. 124651 - 124651

Published: Feb. 20, 2025

Language: Английский

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ZIF-67 grafted-boehmite-PVA composite membranes with enhanced removal efficiency towards Cr(VI) from aqueous solutions

Chemosphere, Journal Year: 2023, Volume and Issue: 341, P. 139996 - 139996

Published: Aug. 27, 2023

Language: Английский

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Physicochemical fabrication of chitosan and algae with crosslinking glyoxal for cationic dye removal: Insight into optimization, kinetics, isotherms, and adsorption mechanism

International Journal of Biological Macromolecules, Journal Year: 2023, Volume and Issue: 253, P. 127112 - 127112

Published: Sept. 27, 2023

Language: Английский

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Edible waste oil to biofuel using reclaimable g-C3N4/HAp/Fe3O4/K2CO3 nanobiocomposite catalyst: Toxicity evaluation and optimization

Environmental Technology & Innovation, Journal Year: 2023, Volume and Issue: 32, P. 103403 - 103403

Published: Oct. 12, 2023

In the current work, new heterogeneous nonobiocomposite of g-C3N4/HAp/Fe3O4/K2CO3 was made from chicken bone and melamine used in biofuel generation edible waste oil (EWO). FTIR, SEM, Map-EDX, BET, VSM, XRD techniques confirmed that catalyst synthesized. The magnetic saturation number BET value were determined to be 8.89 emu.g-1 3.95 m2.g-1, respectively. impact temperature, time, mass, ratio methanol: Oil (MeOH: Oil) on production explored using response surface method-central composite design. maximum yield EWO (98.52%) achieved at contact time 150 min, temperature 65 oC, amount 3 wt%, MeOH: 15:1. Activation energy k0 for transesterification process computed 58.91 kJ.mol-1 3.24×107 min-1, values ΔH ΔG positive process, which indicates is exothermic non-spontaneous. environmental factor (E) also showed has negligible harmful effects environment. can effectively reused many times process. produced good compliance with famous standards serve as a suitable fuel source.

Language: Английский

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