Modified biochar: synthesis and mechanism for removal of environmental heavy metals

Carbon Research, Journal Year: 2022, Volume and Issue: 1(1)

Published: June 18, 2022

Abstract With social progress and industrial development, heavy metal pollution in water soils environment is becoming more serious. Although biochar a low-cost environmentally friendly adsorbent for ions, its adsorption immobilization efficiency still need to be improved. As an upgraded version of biochar, modified has attracted extensive attention the scientific community. This review summarized recent research on treatment methods pollutants using biochar. The features advantages modification techniques such as physical modification, chemical biological other categories were discussed. mechanism removing metals from soil by was summarized. It found that had better performance after which provided higher surface areas functional groups, enough binding sites combine ions. Biochar very promising candidate environment. Furthermore, some high valent ions could reduced low metals, Cr(VI) reduction Cr(III), form precipitates in-situ sorption-reduction-precipitation strategy. However, it direction efforts develop high-efficiency with low-cost, sorption capacity, photocatalytic performance, no secondary future.

Language: Английский

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Application of biochar-based photocatalysts for adsorption-(photo)degradation/reduction of environmental contaminants: mechanism, challenges and perspective

Biochar, Journal Year: 2022, Volume and Issue: 4(1)

Published: July 26, 2022

Abstract The fast increase of population results in the quick development industry and agriculture. Large amounts contaminants such as metal ions organic are released into natural environment, posing a risk to human health causing environment ecosystem problems. efficient elimination from aqueous solutions, photocatalytic degradation pollutants or in-situ solidification/immobilization heavy solid phases most suitable strategies decontaminate pollution. Biochar biochar-based composites have attracted multidisciplinary interests especially environmental pollution management because their porous structures, large functional groups, high adsorption capacities photocatalysis performance. In this review, application biochar adsorbents and/or catalysts for different contaminants, adsorption-photodegradation pollutants, adsorption-(photo)reduction summarized, mechanism was discussed advanced spectroscopy analysis DFT calculation detail. doping oxides is main strategy narrow band gap, generation separation photogenerated e − -h + pairs, produce more superoxide radicals (·O 2 ) hydroxyl (·OH), enhance visible light absorption performance, which dominate (photo)reduction valent metals low metals. environmentally friendly materials, promising candidates cleanup. challenge perspective provided end. Graphical

Language: Английский

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Recent progress in microalgae-derived biochar for the treatment of textile industry wastewater

Chemosphere, Journal Year: 2022, Volume and Issue: 306, P. 135565 - 135565

Published: July 3, 2022

Language: Английский

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Biochar-based composites for remediation of polluted wastewater and soil environments: Challenges and prospects

Chemosphere, Journal Year: 2022, Volume and Issue: 297, P. 134163 - 134163

Published: Feb. 28, 2022

Language: Английский

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Applications of vacancy defect engineering in persulfate activation: Performance and internal mechanism

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 449, P. 130971 - 130971

Published: Feb. 10, 2023

Language: Английский

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An overview of biological mechanisms and strategies for treating wastewater from printing and dyeing processes

Journal of Water Process Engineering, Journal Year: 2023, Volume and Issue: 55, P. 104242 - 104242

Published: Sept. 5, 2023

Language: Английский

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Methylene blue removal from aqueous solutions using a biochar/gellan gum hydrogel composite: Effect of agitation mode on sorption kinetics

International Journal of Biological Macromolecules, Journal Year: 2023, Volume and Issue: 232, P. 123355 - 123355

Published: Jan. 20, 2023

Language: Английский

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Microalgae-Mediated Biosorption for Effective Heavy Metals Removal from Wastewater: A Review

Water, Journal Year: 2024, Volume and Issue: 16(5), P. 718 - 718

Published: Feb. 28, 2024

Environmental contamination by heavy metals poses significant threats to terrestrial and aquatic ecosystems, necessitating the development of effective remediation strategies. Conventional methods for metal removal exhibit limitations, including inadequate efficiency elevated costs. In this context, microalgae have emerged as a promising bioremediation approach due their robust metal-binding capabilities, specifically through biosorption. This review comprehensively examines role in addressing pollution, with primary focus on from wastewater. Microalgae offer wastewater purification potential across diverse sources capitalize growth matrix, yielding valuable bioproducts, biomaterials, bioenergy. Their versatility allows them thrive various wastewaters, facilitating contaminant removal. study also investigates application decentralized water treatment systems (DWTSs), where nature these proves advantageous contaminants directly at point generation or use. holds particular significance regions centralized face obstacles geographical constraints, infrastructure, financial limitations. DWTSs not only provide solution but prove disaster relief scenarios rapidly growing urban areas.

Language: Английский

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Experimental and DFT insights into the adsorption mechanism of methylene blue by alkali-modified corn straw biochar

RSC Advances, Journal Year: 2024, Volume and Issue: 14(3), P. 1854 - 1865

Published: Jan. 1, 2024

A simple NaOH-modified biochar with the pyrolysis temperature of 300 °C (NaCBC ) was synthesized, characterized, and investigated for adsorption performances mechanisms methylene blue.

Language: Английский

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Porous alginate hydrogel beads with spatially separated acidic and basic moieties for selective adsorption of dyes

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: 451, P. 141985 - 141985

Published: April 1, 2024

Language: Английский

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