COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Shuaichuan Cui,Xingxing Wang,Yifan Huang,Shihan Liu,Ziming Li,Yifan Zhang,Shusen Chen,Pengyang Deng
Herein, a defect-rich UiO-66-NH 2 hybrid membrane (DUUM) was successfully synthesized via in-situ growth of defective UiO-66-NH 2 onto irradiation-treated ultra-high molecular weight polyethylene fabrics to enhance the uranium extraction from seawater. The concentration of lattice defects within the framework is regulated by simply adjusting the ratio of ligand to metal (L/M), and DUUM with the L/M ratio of 1 exhibits the best uranium adsorption capacity. The adsorption kinetics investigation shows that DUUM has a higher adsorption rate than UiO-66-NH 2 powders, and the adsorption isotherms investigation shows DUUM has a saturated uranium adsorption capacity of 460 mg·g −1 which is about 5 times that of the defective UiO-66-NH 2 powders. DUUM exhibits a flux of 1440 LMH and a uranium removal efficiency of 65.5 % from natural seawater through single-pass filtration. More importantly, DUUM demonstrates excellent stability in real seawater environments (40-day) and under high doses of gamma-ray irradiation (300 kGy). The enhanced adsorption capacity is attributed to the membrane structure of DUUM which enhances exchange efficiency at the interface between uranium and DUUM via filtration, and the lattice defects which increase the specific surface area and expose more adsorption sites. The high stability results from the inherent hydrophobicity and radiation crosslinking features of the UP substrates. This study about DUUM will promote the practical application of efficient MOF membrane in fast uranium extraction from real seawater, as well as nuclear wastewater.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2016
·Vol. 310
·期 2
·547-557
·
IF 0.983
Zhang Zhi-bin,Qiu Yan-fang,Dai Ying,Wang Pan-feng,Gao Bao,Dong Zhi-ming,Cao Xiao-hong,Liu Yun-hai,Le Zhang-gao
In this article, we report a facile one-pot method to prepare sulfonated graphene oxide (GOS) via vapor–solid transfer reaction of graphene oxide (GO). The synthesized GOS were characterized and investigated as an adsorbent for the adsorption of U(VI) from aqueous solutions. The results indicated that the adsorption of U(VI) was strongly dependent on pH and independent of ionic strength. The adsorption process followed the pseudo-second-order kinetics and the adsorption isotherm agreed well with the Langmuir model, having a maximum adsorption capacity of 309.09 mg g −1 . Thermodynamic parameters indicated that the adsorption reaction was an endothermic and spontaneous process.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Linxin Zheng,Ningchao Zheng,Zhizeng Pan,Guang Gao,Chao He,Xinran Mou,Xiangbiao Yin,Shunyan Ning,Mohammed F. Hamza,Yuezhou Wei
Efficient recovery of uranium from wastewater and seawater provides an important guarantee for the sustainable growth of nuclear energy. Herein, we skillfully use the alkali etching method to construct CeO 2 hollow spheres rich in Ce–OH groups for the removal and recovery of uranium from water matrixes. It is found that the CeO 2 exhibits fast adsorption kinetics (equilibrium time within 10 min) and moderate adsorption capacity (143.1 mg/g), and the removal efficiency of low concentration uranium (0.1 g/L and 1 g/L) reaches 100% within 1 min of adsorption. Moreover, the adsorption of uranium by CeO 2 is almost unaffected by common anions and cations in the environment, even if the concentration of anions is 1000 times that of uranium. More importantly, the CeO 2 can enrich uranium concentration in seawater by 167.9 times and the recovery rate reaches 83.9%. Mechanistic studies reveal that the adsorption of uranium by CeO 2 is mainly attributed to the rich Ce–OH groups on the surface of CeO 2 , resulting in the rapid adsorption of U(VI) and mainly forms a single-bridge model. The findings of this study provide a green and efficient path for the removal and recovery of uranium from wastewater and seawater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2015
·Vol. 308
·期 3
·1095-1102
·
IF 1.034
Wang Zhengshang,Wang Yun,Liao Jiali,Yang Yuanyou,Liu Ning,Tang Jun
Three types of graphene sheets (GS) were decorated by chemical oxidation, electrolysis and ball-milling, respectively. These oxidized samples were characterized using SEM, XRD, Raman, FT-IR and XPS, and then were employed to enrich U(VI) from aqueous solutions as a function of pH, contact time and initial concentration of U(VI). These results displayed that the quantities and types of oxygen-functional groups were extremely different through these methods, which highly determined the adsorption capacity of graphene oxide to uranium. This work may provide some helpful information to optimize these fabrication processes and improve the adsorption ability of GS to uranium.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
RADIOCHIMICA ACTA
·
2024
·Vol. 112
·期 3
·161-173
·
IF 1.4
Hongtao Xia,Yuting Liu,Yang Wang,Zihao Feng,Qi Ren,Jianqi Lv,Yang Li,Yanjun Du,Yun Wang
An innovative phytic acid modified reed straw-derived hydrochar composite (PA-C-RBC) was prepared by using inexpensive reed straw and non-toxic phytic acid for the removal of uranium(VI) from aqueous environment. Several characterization results showed that PA-C-RBC was rough and porous with a large number of hydroxyl, carboxyl, and phosphate groups. The uranium(VI) adsorption process by PA-C-RBC conformed to pseudo-second-order kinetic and Langmuir models, and the theoretical maximal adsorption capacity could attain 418.78 mg/g at pH 5.0. PA-C-RBC had 72.66 % of selectivity and 6772.99 mL/g of distribution coefficient for U(VI). Due to the strong chelating between the hydroxyl and phosphate groups on PA-C-RBC and U(VI), PA-C-RBC had excellent adsorption selectivity. These finding highlighted a high potential for removing U(VI) from aqueous solutions.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Alemtsehay Tesfay Reda,Dongxiang Zhang,Xin Lu
A composite material of europium hydroxide (Eu(OH) 3 ) and glycine (Gly) is synthesized successfully to produce single phase material (Eu(OH) 3 -Gly) which exhibits extremely selective capturing and high removal rate towards uranyl (UO 2 2+ ) ion in an aqueous solution. Eu(OH) 3 -Gly displayed distribution coefficient (K d ) of 3.23 × 10 7 mL/g and removal rate of 100% to lower UO 2 2+ ion concentration from 25 ppm to <1 ppb inside 15 min and these criteria place Eu(OH) 3 -Gly among the top existing adsorbents for such adsorption. Adsorption kinetics for UO 2 2+ follows pseudo-second-order model, proposing a chemisorption adsorption mechanism mainly via H 2 N-U-NH 2 and O-U-O interactions. Eu(OH) 3 -Gly showed good stability after the removal of uranyl ion as investigated by FT-IR and thermogravimetric analysis (TGA) methods. According to TG analysis, Eu(OH) 3 -Gly showed less weight loss (23.7%) after adsorption compared with that of before adsorption (32%), suggesting that the attachment of uranium to the adsorbent contributed for the improvement of the thermal stability of Eu(OH) 3 -Gly.
研究领域:
材料科学
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环境科学
·
放射化学
✓ 已验证
DOI
高影响因子
RADIATION PHYSICS AND CHEMISTRY
·
2025
·
IF 3.3
Jinfeng Li,Nan Zhang,Qianwen Wang,Jianwei Zhang,Bo Tian,Zhigang Li,Haifeng Gu,Hongtao Zhao
The research for highly removal of uranium from nuclear waste is of significance for radionuclide remediation and environment. Herein, a robust pyrazolate-based metal-organic framework (NiBTP) is prepared by γ-irradiation through complexation between 1,3,5-tris(1H-pyrazol-4-yl) benzene (H 3 BTP) and Nickel (II) and presents efficient U(VI) adsorption performance. The synthesized NiBTP is characterized by XRD, FTIR, SEM, TEM, XPS and N 2 adsorption–desorption isotherm analysis. Structural characterizations demonstrate that NiBTP prepared by γ-irradiation possesses decreased BET surface area with hierarchical pore structure, but also has excellent crystallinity and high chemical stability. Batch experiments reveal that NiBTP adsorbent displays high adsorption capacity of uranium and excellent selectivity for UO 2 2+ ion in the presence of competing K + , Cs + , Sr + , Co 2+ , Mg 2+ , Ca 2+ , La 3+ and Eu 3+ ions. Thermodynamic investigation shows the adsorption process is endothermic and spontaneous. In addition, the adsorption mechanism of UO 2 2+ ion onto NiBTP is attributed to the hierarchical pore architecture as well as complexation. This study presents a simpler and more efficient alternative method for the preparation of pyrazolate MOFs and highlights the power of robust pyrazolate MOFs in sequestrations of radioactive pollutants from water environment.
研究领域:
材料科学
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环境科学
·
放射化学
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2025
·
IF 11
Liu Chao-Long,Xuan Keng,Guo Yao-Ping,Jiang Hao,Ma Wen-Jie,Wang Xue-Gang,Zhou Zhong-Kui,Li Jun,Guo Ya-Dan
Urchin-like W 18 O 49 , with a large specific surface area (113.738 m 2 ·g −1 ) and abundant oxygen vacancies (OVs), was prepared using an active sites tuning and microstructure engineering method. This material was applied for U(VI) adsorption for the first time, demonstrating a high adsorption capacity of 567.55 mg·g −1 , which exceeds that of most inorganic adsorbents. Characterization via active site masking experiments and theoretical calculations, etc., indicated that the excellent adsorption performance toward U(VI) was due to strong complexation between UO 2 2+ and W–O bond of W 18 O 49 , facile oxygen vacancy adsorption, and interface electron transfer from W 5+ to UO 2 2+ , which acted as a reducing agent, partially converting U(VI) to U(IV). Furthermore, W 18 O 49 exhibited practical applicability with a removal rate exceeding 82% after 5 cycles, a 92.79% removal rate for real uranium-containing wastewater, and a high uranium recovery rate of 75.96%. Additionally, the synergistic adsorption-photocatalytic effect significantly enhanced U(VI) extraction, reaching an extraction capacity of 988.0 mg·g −1 . This work provides a promising strategy for developing highly efficient U(VI) WO 3 -based adsorbents. Graphical abstract
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Hao Yang,Hanlin Ding,Xiaonuo Zhang,Xuegang Luo,Yu Zhang
In this study, a new surface-modified biobased composite was obtained by modifying the surface of fungal mycelium microspheres (FHMs) with polydopamine (PDA). A. niger mycelium/PDA microspheres (AM/PDA microspheres) were used as a highly efficient adsorbent for the removal of U(VI) ions. This study examined the effects of the initial pH, ionic strength, and electrolyte ions on the U(VI) adsorption capacity of the AM/PDA microspheres. The results confirmed that U(VI) was successfully adsorbed on the AM/PDA microspheres. We compared their adsorption capacity with that of other adsorbents, and the adsorption rate and adsorption capacity of the AM/PDA microspheres were found to be higher than those of the other adsorbents. Equilibrium was achieved after 300 min, and the AM/PDA microspheres had a maximum adsorption capacity of 250.70 mg/g. We aimed not only to investigate the factors that affect the adsorption process but also to provide a new mycelial-based composite adsorbent for U(VI)-contaminated water.
研究领域:
环境科学
·
生物材料学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Haiyan Luo,Haoyu Yao,Min Li,Fanfang Meng,Hui Zhao,Changjiang Yu,Xiangfeng Liang,Huizhou Liu
Efficient extraction of uranium from seawater is of great significance to the stable development of nuclear energy. The graft modification of pectin is expected to realize the efficient extraction of uranium through the dual action of aminoxime and carboxyl groups. In this work, novel biomimetic pectin adsorbents were developed and their performance on the adsorption performance of uranium from seawater was investigated. The physical structure and morphology were characterized by employing FT-IR, BET, SEM and elemental analysis. The skeleton structure and surface functional groups of the pectin-derived adsorbents, which were modified to improve the adsorption selectivity, favored the adsorption of uranium in simulated seawater. The modified apple pectin (MPA) adsorbents exhibited the highest adsorption capacity of 212.27 mg/g at optimal conditions. The thermodynamic results showed that the adsorption of uranium on MPA surface followed the Langmuir single-layer model, and the theoretical maximum adsorption capacity could reach up to 296.25 mg/g. The adsorption process conformed to the pseudo-second-order model. Furthermore, the synergistic mechanism between aminoxime and carboxyl groups of the pectin-based adsorbents was proposed. In conclusion, this work provides a new bio-based adsorbent with high efficiency for uranium extraction from concentrated seawater.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Junjun Li,Tatiana Cherkasova,Yakovlev Alexey Nikolaevich,Peiling Yuan
Powdered sorbents in aqueous solutions suffer from the deficiency in the solid/liquid separation even the sorption capacities were higher than their bulk or less-dispersed forms. The combination of powdered sorbents with membranes would be highly desired to balance the contradiction between high separation efficiency and sorption capability. In this study, cellulose/ball-milled bone char (CL/MB) membranes with sub-micrometer diameter (276.0–281.7 nm) and developed porosity (21.5–98.6 m 2 /g) were fabricated by electrospinning technique. Bone chars originated from the pyrolysis of bone residuals at 350 °C, 500 °C and 650 °C could well dispersed in the electrospinning solvent. CL/MB membranes could adsorb U(VI) with fast kinetics (180.0 min), efficient capacity (309.8 mg/g at pH 5.00 and T 298 K) and excellent selectivity against the interference of coexisting ions in simulated waters. With spectroscopic analysis , the formation of (Ca(UO 2 ) 2 (PO 4 ) 2 (H 2 O) 3 precipitation was dominant for the selectivity. The surface complexation of O-/reductive N-groups with U(VI), the electrostatic attraction of deprotonated O - with positively charged U(VI) species, the cation exchange of U(VI) with Ca 2+ components, and the cation-π coordination of U(VI) should also be considered. This study pave the way for the feasible utilization of electrospun CL/MB membranes as a promising sorbent to capture aquatic U(VI).
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2023
·Vol. 332
·期 9
·3787-3798
·
IF 1.6
Liu Nana,Fang Ziyi,Xu Yunan,Xue Miao,Zhan Liyuan,Wang Binliang,Yuan Yijun
In response to the depletion of global uranium reserves and the radioactive contamination of wastewater, there is an urgent need to develop efficient, sustainable, and cost-effective uranium biosorbents. Herein, a green macroalga Rhizoclonium riparium was prepared for uranium (U(VI)) removal. The results showed that the maximum adsorption capacity of U(VI) was 80.96 mg g −1 (pH = 5, 298 K and 0.1 M NaNO 3 ). The kinetics, isotherms and thermodynamics analysis revealed that the adsorption process was chemisorption, homogeneous monolayer adsorption, endothermic and spontaneous. Through the mechanism characterization, it was proved the adsorbed of uranium on R. riparium was mainly controlled by the complexation between U(VI) and –OH, –COOH, –NH 2 . Besides, the R. riparium possess high selectivity towards uranium and good recycling performance. This work highlights new opportunities for biosorbents to be obtained directly from nature and used to remove radioactive contamination.
研究领域:
环境科学
·
生物技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）