Efficient recovery of rare metal lanthanum from water by MOF-modified biochar: DFT calculation and dynamic adsorption

Biochar, Год журнала: 2025, Номер 7(1)

Опубликована: Фев. 8, 2025

Abstract In this research, a novel metal-organic framework-modified biochar composite (MIL-88b@BC) was created for the first time by modifying rice husk using excellent adsorption properties of framework (MOF), as well reducing solubility MOF substrate, aiming to improve understanding characteristics rare-earth metal recycling and predict its mechanism. Density functional theory (DFT) computations allowed rationally constructing model. According DFT calculations, primary processes involved in La 3+ were π–π interaction ligand exchange, wherein surface hydroxyl group played crucial role. MIL-88b@BC interacted better with than or did. Accompanying batch tests theoretical conjecture's verification demonstrated that pseudo-second-order model Langmuir model, respectively, provided good fit kinetics isotherms. The maximum capacity MOF@BC (288.89 mg g −1 ) achieved at pH 6.0, which significantly higher adsorbents' previously documented capacities. Confirming estimations, BC@MIL-88b BC. Additionally, can be recycled least four times. To mitigate growing scarcity rare earth elements (REEs) lessen their negative environmental effects, work laid path effectively treating substantial volumes wastewater produced while mining REEs. Highlights adsorbent prepared situ growth method. mechanism innovatively investigated based on calculations. Ligand exchange La–O–Fe formation dominated lanthanide ion removal. Graphical

Язык: Английский

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Metagenomic analysis revealed the bioremediation mechanism of lead and cadmium contamination by modified biochar synergized with Bacillus cereus PSB-2 in phosphate mining wasteland

Frontiers in Microbiology, Год журнала: 2025, Номер 16

Опубликована: Фев. 18, 2025

Phosphate mining wasteland is contaminated with heavy metals, such as lead (Pb) and cadmium (Cd), which pose significant environmental risks. Ecological restoration of these lands crucial, but limited research has focused on the remediation metal-contaminated soils using modified biochar functional microorganisms. In this study, we investigated bioremediation phosphate soil in combination phosphate-solubilizing bacterium Bacillus cereus. The effects synergistic approach nutrient content, metal immobilization, microbial community structure were assessed. results indicated that available content increased by 59.32%. extractable state Pb2 + Cd2 decreased 65.06 71.26%, respectively. And conditions significantly improved. Synergistic can increase diversity abundance communities (p < 0.05). Janibacter, Lysobacter, Ornithinimicrobium, Bacillus, Salinimicrobium main flora during remediation, correlations for promotion immobilization organic matter. ZitB, czcD, zntA, cmtR are major resistance genes regulate metabolic pathways to make function more stable after wasteland.

Язык: Английский

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Microwave-assisted synthesis of a β-cyclodextrin/TEMPO-oxidized cellulose/Fe3O4 adsorbent for Pb and Cu remediation in soil

Journal of Cleaner Production, Год журнала: 2025, Номер unknown, С. 145100 - 145100

Опубликована: Фев. 1, 2025

Язык: Английский

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Effective elimination of Pb (II) cations from waste water and polluted water using siderite magnetic biochar

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Март 6, 2025

Magnetic biochar composites were created by pyrolyzing siderite and sawdust in nitrogen gas (N2). adsorption was done a variety of pH temperature ranges on magnetic biochar. A magnet used to extract the MB-liquid from each other following 24-hour shaking period. At Iran's Geological Survey, Pb(II) concentration measured using an ICP (Inductively Coupled Plasma). The adsorption-desorption process carried out five times order evaluate biochar's reusability. Pyrolysis gain MB changes its chemical composition turns into mixture hematite, magnetite maghemite, which imparts magnetism enriches surface functional groups. characterizations showed higher specific area porous structures An external field (magnet) easily separate suspension because XRD investigation revealed that primary component absorbent is magnetite, ferrimagnetic mineral with substantial characteristics. composites' strong capabilities toward Pb (II) ions demonstrated batch tests. 5.0 T = 45 °C, had highest capability 96.92%. mesoporous structure indicated type IV isotherm. It has been most closely matches Langmuir's model. Therefore, it can be said monolayer occurred. Biochar's active sites probably responsible for fast process. Kinetics lead have harmonized pseudo-second order, indicating predominant mechanism onto chemisorption/surface complexation. In summary, serves as dual-functional material, adsorbing species reducing them less harmful forms, added advantage easy recovery reuse due properties. This makes promising material remediation lead-contaminated environments.

Язык: Английский

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Studies on Low-carbon Designed Adsorbents for Cr(VI) and tetracycline removal: Insight into the Diverse Activation and Adsorption Mechanism

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 116295 - 116295

Опубликована: Март 1, 2025

Язык: Английский

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Green manure plant and exogenous degrading bacteria synergistically promote atrazine removal by enriching indigenous rhizosphere degraders

Journal of Environmental Sciences, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский

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In-Situ Remediation of Chromium Contaminated Soil by Biochar Co-Modified by CMC and Nano Zero-Valent Iron: Effects of Acid Rain and Freeze-Thaw Conditions

Soil and Sediment Contamination An International Journal, Год журнала: 2025, Номер unknown, С. 1 - 17

Опубликована: Апрель 18, 2025

Язык: Английский

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Efficient phosphate removal from wastewater using Mg/Fe-functionalized tea stalk biochar through green synthesis and bio-assembly method

Process Safety and Environmental Protection, Год журнала: 2025, Номер unknown, С. 107215 - 107215

Опубликована: Апрель 1, 2025

Язык: Английский

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Enhanced passivation of lead and cadmium from contaminated farmland using biochar with tailored pore properties: Performance and mechanisms

Chemical Engineering Journal, Год журнала: 2024, Номер 497, С. 154467 - 154467

Опубликована: Авг. 2, 2024

Язык: Английский

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Research Progress and Hotspots in Microbial Remediation for Polluted Soils

Sustainability, Год журнала: 2024, Номер 16(17), С. 7458 - 7458

Опубликована: Авг. 29, 2024

Microbial remediation has become a prominent focus in soil pollution control due to its environmental friendliness, cost-effectiveness, and high efficiency. The effectiveness of microbial is rooted the interactions between metabolic activities environment. Various microorganisms employ distinct mechanisms for pollutant treatment, including surface adsorption, intracellular accumulation, biomineralization. Using Web Science Core Collection database, tools such as CiteSpace 6.1.R6, VOSviewer 1.6.20, HistCite Pro were employed conduct quantitative analysis several key aspects: volume thematic distribution research papers on soils, cooperative networks countries institutions, leading journals, major hotspots, emerging trends. reveals that utilizing regulatory functions remediate inorganic pollutants, heavy metals, organic PAHs, becoming significant frontier future research. This study provides valuable reference scholars aiming understand current status remediation, both domestically internationally. It also offers guidance developing efficient, sustainable, safe strategies while identifying directions innovative specific results are follows: (1) China, USA, India, other have frequency citations this field, more in-depth. (2) More attention been paid use contaminated world, mainly Environmental Sciences. (3) Major publications include Chemosphere, Journal Hazardous Materials, Total Environment. In literature, restore environment combination plants repair by metals occupy proportion. (4) areas application (crude oil polycyclic aromatic hydrocarbons (PAHs)), contribution degradation toxicity assessment systems. development combined technology hotspot field focusing symbiosis mycorrhizal fungi plant roots, enhancement ability absorb degrade pollutants their tolerance, interaction mechanism indigenous plants.

Язык: Английский

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