Adsorption of Heavy Metals: Mechanisms, Kinetics, and Applications of Various Adsorbents in Wastewater Remediation—A Review

Waste, Journal Year: 2023, Volume and Issue: 1(3), P. 775 - 805

Published: Sept. 6, 2023

Heavy metal contamination in wastewater is a significant concern for human health and the environment, prompting increased efforts to develop efficient sustainable removal methods. Despite last few decades, further research initiatives remain vital comprehensively address long-term performance practical scalability of various adsorption methods adsorbents heavy remediation. This article aims provide an overview mechanisms, kinetics, applications diverse remediating metal-contaminated effluents. Physical chemical processes, including ion exchange, complexation, electrostatic attraction, surface precipitation, play essential roles adsorption. The kinetics adsorption, influenced by factors such as contact time, temperature, concentration, directly impact rate effectiveness removal. review presents exhaustive analysis adsorbents, categorized activated carbon, biological agricultural waste-based materials, nanomaterials, which possess distinct advantages disadvantages that are linked their area, porosity, chemistry, concentration. To overcome challenges posed contamination, additional necessary optimize adsorbent performance, explore novel devise cost-effective solutions. comprehensive lays foundation innovation designing optimized systems discovering new materials remediation wastewater.

Language: Английский

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Remediation techniques for elimination of heavy metal pollutants from soil: A review

Environmental Research, Journal Year: 2022, Volume and Issue: 214, P. 113918 - 113918

Published: Aug. 1, 2022

Language: Английский

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Micro- and nano-plastics (MNPs) as emerging pollutant in ground water: Environmental impact, potential risks, limitations and way forward towards sustainable management

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 459, P. 141568 - 141568

Published: Jan. 27, 2023

Language: Английский

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An overview of metal-organic frameworks and their magnetic composites for the removal of pollutants

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 320, P. 124144 - 124144

Published: May 24, 2023

As a result of serious pollution in the water environment, sewage disposal has been receiving lot attention from industry. Metal-organic frameworks (MOFs) attract interest adsorption and separation due to their complex structures easily adjustable pore sizes. Magnetic MOFs inheriting advantages both large surface area easy recovery have great potentials pollutants. This paper reviews recent research progress on ions, dyes other contaminants by different types (magnetic non-magnetic MOFs) magnetic composites (Fe3O4@MOF) aqueous environments. The factors affecting pollutants, thermodynamic kinetic effects are discussed with detailed examples. Finally, challenges opportunities for further development elucidated.

Language: Английский

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Innovations and challenges in adsorption-based wastewater remediation: A comprehensive review

Heliyon, Journal Year: 2024, Volume and Issue: 10(9), P. e29573 - e29573

Published: April 20, 2024

Water contamination is an escalating emergency confronting communities worldwide. While traditional adsorbents have laid the groundwork for effective water purification, their selectivity, capacity, and sustainability limitations driven search more advanced solutions. Despite many technological advancements, economic, environmental, regulatory hurdles challenge practical application of adsorption techniques in large-scale treatment. Integrating nanotechnology, material fabrication techniques, data-driven design enabled by artificial intelligence (AI) machine learning (ML) led to a new generation optimized, high-performance adsorbents. These materials leverage properties like high surface area, tailored pore structures, functionalized surfaces capture diverse contaminants efficiently. With focus on effectiveness, this review highlights transformative potential these setting benchmarks purification technologies. This article delivers in-depth exploration current landscape future directions adsorbent technology remediation, advocating multidisciplinary approach overcome existing barriers treatment applications.

Language: Английский

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Simultaneous removal of pharmaceuticals and heavy metals from aqueous phase via adsorptive strategy: A critical review

Water Research, Journal Year: 2023, Volume and Issue: 236, P. 119924 - 119924

Published: March 28, 2023

Language: Английский

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Adsorption of Heavy Metals from Contaminated Water using Leachate Modular Tower

Civil Engineering Journal, Journal Year: 2023, Volume and Issue: 9(6), P. 1522 - 1541

Published: June 1, 2023

The heavy metals (HMs) and metalloids such as Cr(VI), As(Ill), Pb(II) in contaminated water are toxic even at trace levels have caused devastating negative health impacts on human beings. Hence, the effective adsorption of these from is important to protect biodiversity, hydrosphere ecosystems, In this study, a leachate modular tower (LMT) was developed for singular purpose adsorbing HMs. LMT contained nano-slag liner, which synthesized slag. blended different proportions 90:10; 80:20, 70:30, 60:40, 50:50 combined mass clay nano-slag, evaluate most efficient ratio blends capable HMs with 100% efficiency. A series tests were performed capacity embedded liners. Attenuation periods 2, 5, 7, 10 days temperature 500 °C also selected improve sorption rate uptake Subsequently, effluents subjected inductive coupled plasma spectrometry (ICP-MS) concentrations percentages adsorbed HMs, calculated using pseudo-first-order model. results revealed that removal 98%As, 99%Cd, 99.9% Pb achieved 50%:50% soil liner equilibrium period. Furthermore, 98%Zn, 95.45%Cu, 93.3%Fe, 97%Ni, 89% Hg upon further investigation same dosage conditions. scanning electron microscopy (SEM) demonstrated some traces absorbed found surfaces, indicating significant changes microstructure. indicated increased significantly due elevated temperature, aluminosilicate structure, prolonged attenuation period, associated an pH level higher cation exchange (CEC), liner. Doi: 10.28991/CEJ-2023-09-06-017 Full Text: PDF

Language: Английский

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Adsorption of various inorganic and organic pollutants by natural and synthetic zeolites: A critical review

Arabian Journal of Chemistry, Journal Year: 2023, Volume and Issue: 17(1), P. 105474 - 105474

Published: Nov. 24, 2023

Zeolites are microporous crystalline aluminosilicates with high surface area and uniform pore size. Natural synthetic zeolites have been used to adsorb organic inorganic compounds in aqueous media due thier particular physicochemical properties the low cost of process. The flexibility remove pollutants from water, such as dyes, heavy metal ions, phenolic compounds, is discussed this document context contemporary research. This review briefly consolidates currently available literature comprehend structure their synthesized by hydrothermal method. Later, manuscript present different parameters study adsorption mechanisms contaminants using zeolites. main processes adsorbents include chelation, adsorption, natural processes, diffusion, electrostatic interaction complexation. In addition, research demonstrates that dominant models isothermal kinetic Langmuir pseudo-second-order models. We can assess beneficial applicability zeolite materials for real wastewater treatment future comparing capacities removing harmful substances water those other crude

Language: Английский

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Thallium-mediated NO signaling induced lipid accumulation in microalgae and its role in heavy metal bioremediation

Water Research, Journal Year: 2023, Volume and Issue: 239, P. 120027 - 120027

Published: May 1, 2023

Language: Английский

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Agricultural Solid Wastes Based Adsorbent Materials in the Remediation of Heavy Metal Ions from Water and Wastewater by Adsorption: A Review

Molecules, Journal Year: 2023, Volume and Issue: 28(14), P. 5575 - 5575

Published: July 21, 2023

Adsorption has become the most popular and effective separation technique that is used across water wastewater treatment industries. However, present research direction focused on development of various solid waste-based adsorbents as an alternative to costly commercial activated carbon adsorbents, which make adsorptive process more effective, popularising sustainable options for remediation pollutants. Therefore, there are a large number reported results available application raw or treated agricultural biomass-based alternatives aqueous-phase heavy metal ion removal in batch adsorption studies. The goal this review article was provide comprehensive compilation scattered literature information up-to-date overview current state knowledge, based papers utilised wide range raw, modified, waste ions. Metal pollution its source, toxicity effects, technologies, mainly via adsorption, have been reviewed here detail. Emphasis placed ions using by-product-based under physicochemical conditions. Information important influential parameters, such concentration, adsorbent dose, solution pH, temperature, importantly, characteristics removal, critically analysed here. Finally, from reviewed, future perspectives conclusions were presented, few directions proposed.

Language: Английский

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