Rapid and selective uranium extraction from aqueous solution under visible light in the absence of solid photocatalyst

Li, Shaojun; Hu, Yang; Shen, Zewen; Cai, Yawen; Ji, Zhuoyu; Tan, Xiaoli; Liu, Zhixin; Zhao, Guixia; Hu, Shuxian; Wang, Xiangke

doi:10.1007/s11426-021-9987-1

Cited by 88 publications

(23 citation statements)

References 58 publications

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“…The presence of uranium above a certain threshold in aqueous environments can have lasting (Wang et al 2020) health implications that cause severe and irreversible damage (Wang et al 2022b). The sorption-reduction-solidification is a good method for U(VI) immobilization and extraction from wastewater (Cheng et al 2021d;Li et al 2021d;Yang et al 2021c). Ahmed et al (2021a, b, c, d) prepared numerous biochar-based materials and tested performance in the adsorption of U(VI) from wastewater.…”

Section: Heavy Metal Ionsmentioning

confidence: 99%

Biochar for the removal of contaminants from soil and water: a review

Qiu

Liu

Ling

et al. 2022

Biochar

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377

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Biochar shows significant potential to serve as a globally applicable material to remediate water and soil owing to the extensive availability of feedstocks and conducive physio-chemical surface characteristics. This review aims to highlight biochar production technologies, characteristics of biochar, and the latest advancements in immobilizing and eliminating heavy metal ions and organic pollutants in soil and water. Pyrolysis temperature, heat transfer rate, residence time, and type of feedstock are critical influential parameters. Biochar’s efficacy in managing contaminants relies on the pore size distribution, surface groups, and ion-exchange capacity. The molecular composition and physical architecture of biochar may be crucial when practically applied to water and soil. In general, biochar produced at relatively high pyrolysis temperatures can effectively manage organic pollutants via increasing surface area, hydrophobicity and microporosity. Biochar generated at lower temperatures is deemed to be more suitable for removing polar organic and inorganic pollutants through oxygen-containing functional groups, precipitation and electrostatic attraction. This review also presents the existing obstacles and future research direction related to biochar-based materials in immobilizing organic contaminants and heavy metal ions in effluents and soil. Graphical Abstract

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Section: Heavy Metal Ionsmentioning

confidence: 99%

Biochar for the removal of contaminants from soil and water: a review

Qiu

Liu

Ling

et al. 2022

Biochar

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377

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“…Qiu et al [ 25 ] fabricated a ZIF-8/g-C 3 N 4 photocatalyst for the photoreduction of U(VI) from aqueous solutions, and found that ZIF-8/g-C 3 N 4 exhibited high photocatalytic activity, fast photocatalytic rate and superior chemical stability for the reduction of U(VI) to U(IV). Li et al [ 26 ] reported an eco-friendly method for the selective and rapid extraction of U(VI) under visible light conditions without using a catalyst and in which the U(VI) could be reduced to U(IV) quickly. The selective extraction of U(VI) in the presence of different kinds of metal ions showed the excellent selectivity of U(VI) extraction.…”

Section: Interaction Mechanism Of Actinides At Solid-water Interfacesmentioning

confidence: 99%

High Sorption and Selective Extraction of Actinides from Aqueous Solutions

et al. 2021

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The selective elimination of long-lived radioactive actinides from complicated solutions is crucial for pollution management of the environment. Knowledge about the species, structures and interaction mechanism of actinides at solid–water interfaces is helpful to understand and to evaluate physicochemical behavior in the natural environment. In this review, we summarize recent works about the sorption and interaction mechanism of actinides (using U, Np, Pu, Cm and Am as representative actinides) on natural clay minerals and man-made nanomaterials. The species and microstructures of actinides on solid particles were investigated by advanced spectroscopy techniques and computational theoretical calculations. The reduction and solidification of actinides on solid particles is the most effective way to immobilize actinides in the natural environment. The contents of this review may be helpful in evaluating the migration of actinides in near-field nuclear waste repositories and the mobilization properties of radionuclides in the environment.

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“…have been applied to remove the pollutants from large volume of solutions or in-situ solidification/immobilization on solid phases (Chen et al 2022a;Hao et al 2021;Wang et al 2022;Yu et al 2021aYu et al , 2022, it is still a worldwide challenge for the efficient decontamination of pollutants from solid phases such as soils, sediments etc., especial at low concentrations (Liu et al 2022a). The photocatalytic degradation of POPs or reduction of metal ions is one effective strategy for the in-situ decontamination, to reduce the organic contaminant concentration or immobilize the heavy metal ions on solid particles (Cai et al 2022a;Cheng et al 2021;Li et al 2021b;Yang et al 2021a;Zhang et al 2022a).…”

Section: Introductionmentioning

confidence: 99%

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

Cai

Zhang

et al. 2022

Biochar

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158

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The fast increase of population results in the quick development of industry and agriculture. Large amounts of contaminants such as metal ions and organic contaminants are released into the natural environment, posing a risk to human health and causing environment ecosystem problems. The efficient elimination of contaminants from aqueous solutions, photocatalytic degradation of organic pollutants or the in-situ solidification/immobilization of heavy metal ions in solid phases are the most suitable strategies to decontaminate the pollution. Biochar and biochar-based composites have attracted multidisciplinary interests especially in environmental pollution management because of their porous structures, large amounts of functional groups, high adsorption capacities and photocatalysis performance. In this review, the application of biochar and biochar-based composites as adsorbents and/or catalysts for the adsorption of different contaminants, adsorption-photodegradation of organic pollutants, and adsorption-(photo)reduction of metal ions are summarized, and the mechanism was discussed from advanced spectroscopy analysis and DFT calculation in detail. The doping of metal or metal oxides is the main strategy to narrow the band gap, to increase the generation and separation of photogenerated e−-h+ pairs, to produce more superoxide radicals (·O2−) and hydroxyl radicals (·OH), to enhance the visible light absorption and to increase photocatalysis performance, which dominate the photocatalytic degradation of organic pollutants and (photo)reduction of high valent metals to low valent metals. The biochar-based composites are environmentally friendly materials, which are promising candidates in environmental pollution cleanup. The challenge and perspective for biochar-based catalysts are provided in the end. Graphical Abstract

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Rapid and selective uranium extraction from aqueous solution under visible light in the absence of solid photocatalyst

Cited by 88 publications

References 58 publications

Biochar for the removal of contaminants from soil and water: a review

Biochar for the removal of contaminants from soil and water: a review

High Sorption and Selective Extraction of Actinides from Aqueous Solutions

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

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