Graphene-based materials for effective adsorption of organic and inorganic pollutants: A critical and comprehensive review

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 863, P. 160871 - 160871

Published: Dec. 12, 2022

Language: Английский

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Recent advances in chitosan-based nanocomposites for adsorption and removal of heavy metal ions

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 270, P. 132386 - 132386

Published: May 15, 2024

Language: Английский

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Adsorption of Organic Pollutants from Wastewater Using Chitosan-Based Adsorbents

Polymers, Journal Year: 2025, Volume and Issue: 17(4), P. 502 - 502

Published: Feb. 14, 2025

Among the naturally occurring polysaccharides, chitosan is second-most abundant polysaccharide. It obtained from chitin through a process known as deacetylation. biodegradable, biocompatible, and non-toxic, which made it suitable for various environmental applications. In present review, structure, properties, characteristics of were discussed. addition, modified forms (including cross-linked, nanoparticles, functionalized, grafted chitosan) enumerated. The applications these in adsorption organic pollutants (such antibiotics, dyes, pesticides, microplastics, polyaromatic hydrocarbons, parabens, polychlorobiphenyls) are comprehensively reviewed. Furthermore, mechanism adsorption, isotherm (Langmuir Freundlich), kinetic models highlighted. Finally, economic viability assessment impact processing tons shrimp shells into annually

Language: Английский

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Recent advances in removal of inorganic anions from water by chitosan-based composites: A comprehensive review

Carbohydrate Polymers, Journal Year: 2023, Volume and Issue: 320, P. 121230 - 121230

Published: July 24, 2023

Language: Английский

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1,2,4,5-Benzene Tetracarboxylic Acid-Doped Polyaniline/Protonated Carbon Nitride Nanostructures for Cr(VI) Adsorption in Water

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(11), P. 13050 - 13061

Published: June 4, 2024

This work outlines the fabrication of a nanocomposite, namely, 1,2,4,5-benzene tetracarboxylic acid-doped polyaniline/protonated carbon nitride (H4BTC-PANI/pC3N4) through straightforward two-step process. Various advanced analytical tools validated formation composite. Subsequently, adsorption characteristics prepared composite for uptake Cr(VI) ions were assessed via batch experiments. Removal equilibrium and kinetic approaches clearly demonstrated simulation data Langmuir pseudo-second-order models. The thermodynamic analysis disclosed that removal by H4BTC-PANI/pC3N4 material was spontaneous, endothermic procedure associated with an increase in surface site availability randomness. It found using 0.25 g/L adsorbent dose at pH 2, almost 97.1% chromium eliminated within time 90 min. Furthermore, maximum adsorbed amount 1229 mg·g–1, exceeding capabilities most similar adsorbents. composites retained significant capacity even after undergoing five regeneration cycles, demonstrating excellent reusability. Monte Carlo (MC) calculations executed to search stable configuration energies H4BTC on pC3N4, PANI H4BTC/pC3N4, surfaces aqueous system. experimental findings indicated holds promise as cost-effective removing hexavalent from wastewater, showcasing considerable potential practical use.

Language: Английский

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Comprehensive insights into the application of graphene-based aerogels for metals removal from aqueous media: Surface chemistry, mechanisms, and key features

Advances in Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 335, P. 103338 - 103338

Published: Nov. 14, 2024

Efficient removal of heavy metals and other toxic metal pollutants from wastewater is essential to protect human health the surrounding vulnerable ecosystems. Therefore, significant efforts have been invested in developing practical sustainable tools address this issue, including high-performance adsorbents. In respect, within last few years, graphene-based aerogels/xerogels/cryogels (GBAs) emerged drawn attention as excellent materials for removing recovering harmful valuable different aqueous media. Such an upward trend mainly due features aerogel combined with properties graphene derivatives aerogel's network, GBAs' unique three-dimensional (3D) porous structure, high porosity, low density, large specific surface area, exceptional electron mobility, adjustable rich chemistry, remarkable mechanical features, tremendous stability. This review offers a comprehensive analysis fundamental aspects phenomena related application GBAs removal. Herein, we cover all types (bottom-up) synthesized GBAs, true microporous aerogels well 3D open-cell interconnected mesoporous macroporous aerogels, foams, sponges. Indeed, provide insights into understanding suitability such important by revealing mechanisms involved factors inducing controlling highly selective behavior these distinctive Besides conventional adsorptive pathways, critically analyzed ability electrochemically capture (i.e., electrosorption) their efficiency detoxification through reductive adsorption-reduction-readsorption). We also covered reusability aspect (GAs)-based adsorbents, which strongly linked outstanding stability efficient desorption captured metals. Furthermore, view numerous environmental benefits, development magnetically recoverable GAs highlighted. Moreover, shed light on potential scalable implementation evaluating performance continuous processes while highlighting versatility demonstrated remove multiple contaminants along Finally, provides readers accessible overview critical discussion major recent achievements regarding applications GAs-based adsorbents ions Along our recommendations suggestions future work new research directions opportunities, aims serve resource researchers field treatment inspire further progress towards next-generation expanding application.

Language: Английский

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Malachite green removal by Eryngium caeruleum ash

Journal of the Serbian Chemical Society, Journal Year: 2025, Volume and Issue: 90(2), P. 215 - 231

Published: Jan. 1, 2025

In this study, malachite green (MG) has been successfully removed from an aqueous solution with the use of Eryngium caeruleum ash as adsorbent. The influence effective factors on dye removal process, like contact time, initial concentration dye, amount adsorbent, temperature and pH, studied. results revealed that optimal adsorption occurred at pH 7, 120 min 0.01 g adsorbent 100 mg L-1 concentration. Furthermore, follow Langmuir isotherm a correlation coefficient R2 = 0.98 (qmax 476.19 g-1) pseudo-second order kinetic (R2 0.97). Endothermic spontaneous were implied by positive ?H?, ?S? negative ?G?. Therefore, in to remove MG solutions, E. can be exploited low-cost environmentally friendly

Language: Английский

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Sorption enhancement of Cr(VI) from aqueous solution by polyaniline confined in three-dimensional network of composite porous hydrogel

Environmental Science and Pollution Research, Journal Year: 2023, Volume and Issue: 30(40), P. 92404 - 92416

Published: July 25, 2023

Language: Английский

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The absorption effect and mechanism of graphene oxide removal from aqueous solution by basalt stone power

Arabian Journal of Chemistry, Journal Year: 2024, Volume and Issue: 17(7), P. 105805 - 105805

Published: April 21, 2024

Graphene oxide (GO) is a novel carbon material utilized extensively for diverse industrial applications. When exposed to environmental elements like sunlight and chlorination, GO can undergo series of physical chemical transformations, its presence in water the environment endanger ecosystems. Therefore there need methods that effectively remove from water. Accordingly, we delve into efficacy basalt stone powder (BSP) as an adsorption medium purifying aqueous solutions GO. We examine impact various experimental parameters—namely pH, initial solution concentration, adsorbent mass, contact duration, ambient temperature—on adsorption, employing method controlled variables. The notably influenced by pH level. At acidic 3, concentration 80 mg/L, dosage 50 mg, temperature 303 K (approximately 30 °C), removal efficiency reaches impressive 99 %, boasting maximum capacity 112 mg/g. Dynamically, kinetics align most closely with pseudo-first-order model, achieving equilibrium after 24 h. Thermodynamic analyses reveal Langmuir isotherm model accurately describes behavior, indicating enhancement BSP's rises. Based on thermodynamic equations, onto BSP deduced be spontaneous process. Our findings illustrate considerable potential treatment water, therefore it may prove useful remediation efforts.

Language: Английский

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Aqueous removal of Cr(VI) by Citrus sinensis juice-coated multi-walled carbon nanotubes

Chemical Papers, Journal Year: 2024, Volume and Issue: 78(9), P. 5415 - 5431

Published: May 9, 2024

Abstract A novel adsorbent was prepared from multi-wall carbon nanotubes (MWCNTs) and Citrus sinensis juice extract-modified MWCNTs (OJMW) characterized using scanning electron microscopy (SEM), Fourier transform infrared spectra (FTIR), X-ray diffractometer (XRD), BET thermogravimetric analysis. The results showed that the exhibited good surface area, pore size, functional groups, robust stability at elevated temperatures (308 313 K). applied in water for sequestration of Cr(VI). adsorption Cr(VI) on OJMW influenced by factors adsorption. Optimum removal attained 180 min contact time, 0.05 g dose, solution pH 2 OJMW. kinetic behaviour onto governed pseudo-first-order pseudo-second-order model, respectively. equilibrium data obtained uptake fitted satisfactorily with Freundlich Langmuir isotherm models, Meanwhile, monolayer capacities ( q max ) 44.72 12.26 −1 , respectively, 298 K. process spontaneous feasible. direction energy flow followed endothermic exothermic processes, adsorption–desorption experiments had regenerative abilities.

Language: Английский

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