Natural polymer Nicandra physaloides (L.) Gaertn seed gum mediated assembly of hydroxyapatite assembly as versatile sponge for water pollution control

Wang, Xudong; Wang, Shaobin; Zhou, Li; Cai, Chengkun; Hu, Mingfang; Yu, Xiaofang; He, Rong; Zhu, Wenkun

doi:10.1016/j.jclepro.2023.137320

Cited by 7 publications

(3 citation statements)

References 45 publications

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“…In particular, after reaction with U(VI), the FT-IR spectra displayed a new peak at 912 cm −1 attributed to O�U�O bonding, suggesting the generation of new uranium-bearing species on the surface of BS-ZVI. 11 In addition, functional groups associated with EPS of S. putrefaciens, such as −OH (3280 cm −1 ), C−H (1655 cm −1 ), C−OH (1534 cm −1 ), C−O (1241 cm −1 ), and P−O (1069 cm −1 ), were found to undergo vibrational shifts of varying degrees, suggesting that these functional groups engaged in reactions that occurred during the uranium enrichment process. 46 Figure S17 shows the full XPS spectra of S. putrefaciens, ZVI and BS-ZVI after reaction and the U 4f signals were clearly observed.…”

Section: Enrichment Mechanismmentioning

confidence: 99%

“…The enrichment and separation of uranium from uranium mine wastewater is a pressing issue that must be addressed. − Uranium is frequently found in two valence states: hexavalent uranium (U(VI)) and tetravalent uranium (U(IV)) . As is well-known, U(VI) mainly exists in the form of soluble UO 2 2+ , which is highly susceptible to migration with groundwater flow, causing a wider range of radioactive contamination and heavy metal poisoning. − Therefore, it is efficient to convert highly mobile U(VI) to low-mobility U(IV) before treating effluent from uranium mines …”

Section: Introductionmentioning

confidence: 99%

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Enhancing Commercially Iron Powder Electron Transport by Surface Biosulfuration to Achieve Uranium Extraction from Uranium Ore Wastewater

Yang,

Wei,

Wang

et al. 2024

Inorg. Chem.

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The zero-valent iron (ZVI) has attracted increasing attention due to the enhanced reactivity of ZVI to uranium wastewater. However, ZVI practical application is hampered due to its susceptibility to oxidation and the formation of passivation layers during storage and in situ restoration. To address these issues, we used a biosulfuration approach to modify ZVI for application in uranium ore wastewater treatment. A series of physicochemical characterization tools and photoelectronic analyses showed that BS-ZVI considerably increased carrier separation efficiency and visible light absorption capacity, resulting in a significant photoassisted enhancement effect on uranium extraction. Accordingly, the uranium removal efficiency of BS-ZVI reached 91% within 60 min, and its maximum adsorption capacity was 336.3 mg/g. By analyzing the mechanism, the improved U(VI) removal performance was mostly responsible on the dissolution of the passivation layer on the surface of ZVI, the generation of Fe(II) and FeS, and the important role of Shewanella putrefaciens extracellular polymers (EPS). Overall, the BS-ZVI biohybrid merges with the high activity of ZVI, bio-FeS, and self-regeneration ability of bacteria, expanding a promising new approach for sustainable treatment of uranium mine wastewater.

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Section: Enrichment Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing Commercially Iron Powder Electron Transport by Surface Biosulfuration to Achieve Uranium Extraction from Uranium Ore Wastewater

Yang,

Wei,

Wang

et al. 2024

Inorg. Chem.

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“…Solving the issue of water pollution brought by organic dyes and antibiotics has emerged as one of the major challenges in the modern environment, which is plagued by the discharge of wastewater rich in organic contaminants. Physical and chemical approaches are now used to treat wastewater, including membrane filtration, fenton treatment, ion exchange, electrochemical degradation, photocatalytic degradation, and adsorption . Adsorption is regarded as one of the most effective techniques for cleaning water due to simple operation, low cost, adaptable structure, and insensitivity to harmful pollutants .…”

Section: Introductionmentioning

confidence: 99%

Bi-Activation Engineering of Lignin-Derived Porous Carbon Adsorbent for Highly Efficient Water Purification

Bai,

Wei,

Qiu

et al. 2023

Ind. Eng. Chem. Res.

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Organic contaminants have become a major concern in current environmental policies. Biochar is often used to absorb pollutants due to its large surface area, wide availability, and cost-effectiveness. Lignin, a byproduct of the pulp and paper industry, is an ideal precursor for biochar due to its abundance, sustainability, and high carbon content. Bi-activation engineering of alkali lignin during the carbonized process by combining potassium carbonate and melamine to produce porous carbon with more micro–mesoporous structure was proposed. Melamine reacts with the carbon matrix during the activation process, creating new alkaline compounds and releasing more gas, resulting in the formation of more micropores and mesopores. Adjusting the ratio of potassium carbonate to melamine can optimize the micro–mesoporous structure of porous carbon materials. In this regard, a nitrogen-doped three-dimensional porous carbon (ALNC-2-1) with a specific surface area of up to 3522 m2 g–1 was synthesized for the adsorption of methylene blue and tetracycline hydrochloride in wastewater; the largest adsorption capacities were 1364 and 1682 mg g–1, respectively. The adsorption process was found to follow the pseudo-second-order kinetic model and was attributed to electrostatic interaction, pore filling, hydrogen bonding, and π–π interaction. Moreover, ALNC demonstrated high removal rates for organic pollutants and excellent regeneration performance, thus making it a promising material for practical wastewater treatment.

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Gel-forming polysaccharides of traditional gel-like foods: Sources, structure, gelling mechanism, and advanced applications

Fu,

Wang,

Pan

et al. 2024

Food Research International

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Natural polymer Nicandra physaloides (L.) Gaertn seed gum mediated assembly of hydroxyapatite assembly as versatile sponge for water pollution control

Cited by 7 publications

References 45 publications

Enhancing Commercially Iron Powder Electron Transport by Surface Biosulfuration to Achieve Uranium Extraction from Uranium Ore Wastewater

Enhancing Commercially Iron Powder Electron Transport by Surface Biosulfuration to Achieve Uranium Extraction from Uranium Ore Wastewater

Bi-Activation Engineering of Lignin-Derived Porous Carbon Adsorbent for Highly Efficient Water Purification

Gel-forming polysaccharides of traditional gel-like foods: Sources, structure, gelling mechanism, and advanced applications

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