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Article
Engineering, Environmental
Yang Ding et al.
Summary: This study evaluated the associations between DOM and U during the coprecipitation of DOM with Fh, and investigated the effects of DOM molecules on the kinetics of U release during Fe (oxyhydr)oxides transformation. The results showed that phenolic and polyphenolic compounds with different O/C ratios and aliphatic compounds contributed to UO22+ binding when Fh coprecipitated with DOM. In contrast, phenolic and polyphenolic compounds with higher O/C ratios and condensed aromatics were preferentially retained on Fe (oxyhydr)oxides during the transformation. XPS results suggested that the coprecipitated DOM molecules facilitated the reduction of U(VI) to U(IV) during the transformation.
Article
Engineering, Environmental
Zhenping Tang et al.
Summary: This study investigates the effects and mechanisms of aging and oxygen-containing functional groups on the adsorption of uranium by microplastics. The results show that the amount of uranium adsorption by aged microplastics is significantly higher than that of fresh microplastics. The electronegative oxygen atoms in the oxygen-containing functional groups in aged microplastics can serve as potential sites for electrostatic interactions with uranium.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jianping Lu et al.
Summary: This study demonstrates the successful application of zerovalent iron (Fe(0)) for the biological reduction of uranium (VI) [U(VI)]. The experiments conducted in a continuous-flow biological column showed that Fe(0) supported U(VI) reduction achieved a maximum removal efficiency of 100% and a capacity of 46.4 +/- 0.52 g/(m(3).d). The longevity of Fe(0) was also significantly increased. Metagenomic analysis revealed the upregulation of genes involved in U(VI) reduction and Fe(II) oxidation. This research provides a promising remediation strategy for U(VI)-polluted aquifers.
Article
Multidisciplinary Sciences
Zhongshan Chen et al.
Summary: In this study, a family of isoreticular crystalline hydrazide-based COF photocatalysts was constructed using reticular chemistry, with their optoelectronic properties and local pore characteristics modulated by different linkers. The excited state electronic distribution and transport pathways in the COFs were investigated at a molecular level using experimental methods and theoretical calculations. One of the developed COFs, COF-4, exhibited remarkable excited state electron utilization efficiency and charge transfer properties, achieving a record-high photocatalytic uranium extraction performance of approximately 6.84 mg/g/day in natural seawater among all techniques reported so far. This study provides a new understanding of COF-based photocatalyst operation and guides the design of improved COF photocatalysts for various applications.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Fenglei Liu et al.
Summary: A bio-adsorbent was prepared by introducing persimmon tannin and amino-functionalized MXenes into dialdehyde cellulose nano-fibres. The bio-adsorbent possessed a fibrous structure, abundant active groups, and high chemical stability. It showed high uptake amounts towards U(VI) and Th(IV). The adsorption data followed Langmuir and Pseudo-second-order models, indicating electron sharing between bio-adsorbents and adsorbates. The competitive adsorption studies found that the bio-adsorbent had a selective affinity for U(VI)/Th(IV), with a slight decrease in removal efficiency after multiple adsorption-desorption cycles. The elimination of radionuclides mainly depended on strong coordination, complexation, and the synergetic effect of surface adsorption and intercalation adsorption. Thus, this bio-adsorbent has significant potential for the treatment of radioactive wastewater.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Fenglei Liu et al.
Summary: A novel collaborative strategy was developed by loading nZVI into the inter-layer structure of MBenes, enhancing the removal of U(VI)/Cr(VI). The results showed that nZVI@MBenes exhibited higher removal rate and saturated capacity compared to nZVI or MBenes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Fenglei Liu et al.
Summary: MXenes-decorated nanoscale FeS composites were prepared via electrostatic self-assembly strategy for efficient U(VI)/Cr(VI) adsorption-reduction. Different analytical techniques characterized the materials and confirmed the desired morphology and properties. MXenes improved the dispersion of FeS nano-particles and suppressed aggregation. The adsorption data followed the Langmuir isotherm and Pseudo-second-order equation, with maximum removal efficiencies of 88.5 and 107.2 mg/g for uranium(VI) and chromium(VI). The presence of other cations and anions had no significant influence on U(VI)/Cr(VI) removal, and the elimination process was spontaneous and endothermic. The work demonstrated the potential of MXenes-based materials for wastewater decontamination.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Qingyi Zeng et al.
Summary: A cobalt-doped perovskite molybdenum trioxide catalyst was synthesized and used for degrading organic contaminants. The unique structure of the catalyst facilitated the activation of peroxymonosulfate, resulting in efficient removal of bisphenol A. Singlet oxygen was identified as the main active species for the degradation process. The carrier mechanism allowed the catalyst to maintain high performance during repeat use.
Review
Chemistry, Inorganic & Nuclear
Douchao Mei et al.
Summary: This paper provides a comprehensive review on the enrichment and removal of U(VI) from seawater and wastewater using metal-organic frameworks (MOFs) and covalent organic frameworks (COFs). It discusses the synthetic approach, influencing factors, adsorption mechanism, and compares the performance of MOFs and COFs with other materials. The paper also points out the current problems and discusses the future directions for MOFs and COFs in uranium treatment.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Environmental Sciences
Di Zhang et al.
Summary: This study introduced an efficient seawater uranium extraction adsorbent Ti3C2-AO-PA by incorporating amidoxime (AO) groups and grafting polyamides (PA) onto the surface of Ti3C2. The material exhibited high selectivity for uranium adsorption and excellent resistance to biofouling. The findings provide a promising strategy for rapid and selective uranium adsorption from seawater, with significant implications for uranium extraction from seawater.
ENVIRONMENTAL POLLUTION
(2023)
Article
Chemistry, Physical
Fenglei Liu et al.
Summary: A MBene based Fe3S4@MBenes composite was constructed and investigated for the removal of U(VI) and Se(IV). Results showed that the addition of MBenes could improve the performance of Fe3S4 by restraining its aggregation and enhancing its antioxidant ability. Kinetic and isotherm studies revealed that the adsorption of U(VI)/Se(IV) followed a chemical rate-limiting process and conformed to the Langmuir isothermal model. Characterization analysis and DFT calculation demonstrated that U(VI)/Se(IV) were removed through synergistic adsorption-reduction effect. Fe3S4@MBenes was found to be a feasible method for practical remediation of radionuclides.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Ruirui Li et al.
Summary: A cascade electro-dehydration process was proposed for the simultaneous extraction and enrichment of uranium from simulated seawater. The results showed that the electro-dehydration effect in selective electrodialysis allowed for an increased uranium concentration of 1.8 times with a CJMC-5 cation-exchange membrane. Furthermore, a cascade electro-dehydration by combining selective electrodialysis with conventional electrodialysis enabled a uranium concentration increase of approximately 7.5 times with an extraction yield rate over 80%.
Article
Environmental Sciences
Fenglei Liu et al.
Summary: A biochar-based composite (Ti3C2Tx@biochar-PDA/PEI) was constructed by decorating Ti3C2Tx and polydopamine on coconut shell biochar via electrostatic self-assembly method. The study demonstrated that Ti3C2Tx@biochar-PDA/PEI exhibited excellent performance in capturing radionuclides, especially U(VI) and Cs(I), due to its high porosity and diverse functional groups. The composite also showed good adsorption performance in complex co-existing ion environment and could be successfully regenerated for multiple cycles.
Article
Chemistry, Multidisciplinary
Zhibin Zhang et al.
Summary: In this work, a new strategy for U(VI) removal using the PMo12/UiO-66 heterojunctions combining adsorption and photocatalytic reduction was proposed. The PMo12 was encapsulated in the cavities of UiO-66 using a one-step hydrothermal method, resulting in PMo12/UiO-66 with high adsorption capacity and photocatalytic activity. The study showed that 15% PMo12/UiO-66 had a maximum theoretical sorption capacity of 225.36 mg/g for U(VI) and the photoreduction rate was about thirty times higher than that of UiO-66. Under light irradiation, the photogenerated electrons rapidly transferred from UiO-66 to PMo12, effectively reducing pre-enriched U(VI) to U(IV). This work provides new insights into the remediation of the radioactive environment.
CHINESE CHEMICAL LETTERS
(2022)
Review
Engineering, Chemical
Byung-Moon Jun et al.
Summary: Environmental pollution, particularly from radioactive uranium contamination, is a growing research focus due to the expansion of nuclear power plants to meet global energy demand. The adsorption process is commonly used for water purification, classified into organic, inorganic, composite/nanomaterials, and framework materials, with enhanced performance through physical/chemical modifications and manufacture of organic-inorganic hybrids attributed to electrostatic interaction, surface complexation, and ion exchange mechanisms. Further research is still needed to fully understand the process of purifying contaminated radioactive water.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Lan Xie et al.
Summary: As the nuclear energy industry develops, the treatment of nuclear waste becomes crucial. In this study, MXene material with improved adsorption capacity for uranium was synthesized and characterized. The results showed that the material exhibited excellent adsorption ability for uranium, providing a new option for the treatment of nuclear waste.
Article
Engineering, Environmental
Fan Chen et al.
Summary: Ion exchange (IX) is an effective method for extracting uranium from wastewater, reducing the environmental impact of uranium mining and recovering uranium resources. However, the deactivation of the resin and the role of attached microorganisms are still not well understood.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Analytical
P. Amesh et al.
Summary: The magnetite embedded mesoporous silica functionalized with succinic acid (Fe-MCM-SUC) was prepared as an adsorbent for targeted adsorption of uranium from aqueous solution. The adsorbent showed high uranium adsorption capacity and easy recovery, making it a potential candidate for uranium recovery from aqueous solution.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Engineering, Chemical
Yujiang Meng et al.
Summary: A highly effective uranium adsorbent with high specific surface area and efficient adsorption performance was prepared, showing high selectivity and recylability in simulated seawater. The study on influencing factors and adsorption kinetics provided insights for its potential application in uranium extraction.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Zeru Wang et al.
Summary: This study investigates the adsorption of uranium by carbon nitride polymers and demonstrates that nitrogen-rich carbon nitride polymer C3N5 exhibits significantly higher adsorption performance and selectivity compared to g-C3N4. The adsorption process is a combination of physical and chemical adsorption, and C3N5 shows high kinetics and a theoretical maximum adsorption capacity of 207 mg/g for U(VI) ions.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Physical
Weisong Zhao et al.
Summary: In this study, polyhedral oligomeric silsesquioxane (POSS-OH) and hydroxypropyl cellulose (HPC) were grafted onto two-dimensional material MXene, producing chemically stable CHMP with adjustable interlayer space. The CHMP exhibited excellent performance in the adsorption of uranium ions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Environmental
Siyi Wang et al.
Summary: In this study, a novel composite material nZVI/Alk-Ti3C2Tx was developed for the simultaneous adsorption and reduction of U(VI) in anoxic conditions, showing efficient removal efficiency and high uptake capacity. The composites exhibited high U(VI) removal rates in different environmental media. The study also clarified the different pathways for U(VI) elimination based on the reaction mechanisms between U(VI) and nZVI/Alk-Ti3C2Tx.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Meiling Yin et al.
Summary: The study comprehensively investigated the role of uranium re-adsorption behaviors during leaching tests with uranium mill tailings, revealing the influence of environmentally relevant factors on U re-absorption capacity and mechanism on UMTs with different particle sizes. The findings suggest that the environmental hazards and ecological risks of the U containing (waste) solids might have been underestimated due to the ignorance of the readsorption process, since the re-adsorbed U could be easily re-mobilized. Insights from this study are also helpful in developing effective in-situ remediation strategies.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Wentian Zheng et al.
Summary: An integrated electrochemical filtration system was designed in this study for catalytic activation of PMS and degradation of aqueous microcontaminants. The system showed superior activity in degrading a wide array of persistent organic contaminants across various conditions, providing a green strategy for the remediation of organic pollution.
Review
Chemistry, Multidisciplinary
Pin Ma et al.
Summary: Researchers worldwide have made significant progress in electrochemical sodium-ion storage, with MXene-based materials being considered as one of the most potential electrode materials. The latest research work covers a wide range of applications of pure MXenes and MXene-based composites, exploring effective methods to enhance electrochemical performance.
Review
Environmental Sciences
Yubing Sun et al.
Summary: This review summarizes the application of surface complexation modeling in fitting uranium adsorption, providing beneficial guidelines for predicting the transport and fate of uranium in geologic environments.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Multidisciplinary
Dongbin Xiong et al.
Summary: In this study, MXene membranes with controllable in-plane pores were used as interlayers to regulate Li ion transportation and LiPS immobilization in Li-S batteries. The porous MXene membranes with optimized pore density and size effectively anchored LiPS and ensured fast Li ion diffusion, leading to improved rate performance and long-term cyclability of Li-S batteries.
Article
Chemistry, Multidisciplinary
Yilong Hua et al.
Summary: The core-shell structure of nanoscale zero-valent iron (nZVI) has been shown to provide multiplex solution and surface chemistry for reliable and high-efficiency enrichment and separation of uranium from low-level sources. Treatment of uranium-tailings wastewater in continuous-flow reactors resulted in reacted nZVI with high uranium content and treated wastewater with significantly reduced uranium concentration. This research further supports the cost-effective use of nanotechnology for pollution control and resource recovery.
ENVIRONMENTAL SCIENCE-NANO
(2021)
Article
Materials Science, Multidisciplinary
Yi-Lin Liu et al.
Summary: Aqueous alkaline batteries have high energy and power densities, but face limitations in capacity, kinetics, and stability of anode materials. This study introduces a novel method to produce two-dimensional bismuth oxide selenium and reduced graphene oxide composites, which show reduced volume change during charging and discharging, high capacity, and excellent cycling stability. The composite materials demonstrate promising potential for improving the development of anode materials in aqueous batteries.
ENERGY & ENVIRONMENTAL MATERIALS
(2021)
Review
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Fuqiu Ma et al.
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
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Pengcheng Zhang et al.
ACS APPLIED MATERIALS & INTERFACES
(2020)
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Varagunapandiyan Natarajan et al.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
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Yihan Wang et al.
CHEMICAL PHYSICS LETTERS
(2020)
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(2020)
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CHEMICAL ENGINEERING JOURNAL
(2019)
Review
Materials Science, Multidisciplinary
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PROGRESS IN MATERIALS SCIENCE
(2019)
Article
Green & Sustainable Science & Technology
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JOURNAL OF CLEANER PRODUCTION
(2019)
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Youngho Sihn et al.
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Huimin Zhang et al.
JOURNAL OF CLEANER PRODUCTION
(2019)
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Fei Li et al.
JOURNAL OF MATERIALS CHEMISTRY A
(2019)
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Review
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CHEMICAL SOCIETY REVIEWS
(2018)
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CHEMICAL ENGINEERING JOURNAL
(2018)
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Sergey Tsarev et al.
ENVIRONMENTAL SCIENCE-NANO
(2017)
Review
Chemistry, Multidisciplinary
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Lin Wang et al.
CHEMICAL COMMUNICATIONS
(2017)
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Nanoscience & Nanotechnology
Lin Wang et al.
ACS APPLIED MATERIALS & INTERFACES
(2016)
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Gaosheng Zhang et al.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2014)
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Guohui Dong et al.
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(2012)
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
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BIORESOURCE TECHNOLOGY
(2009)
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AY Zhang et al.
REACTIVE & FUNCTIONAL POLYMERS
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