JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Ziheng Bai,Qi Liu,Hongsen Zhang,Jingyuan Liu,Jing Yu,Jun Wang
The development of nuclear energy requires the consumption of large amounts of uranium resources, and the uranium in seawater is very abundant. Therefore, it is very important to collection of uranium from seawater using efficient and convenient methods. In this work, imidazole-4, 5-dicarboxylic acid (H 3 IMDC) was introduced onto the surface of hemp fibers (HF) by two-step method to prepare a novel bio-based polymeric material HF-H 3 IMDC 3 adsorbent containing imidazole nitrogen and carboxyl groups. The introduction of H 3 IMDC could improve the activity sites and hydrophilicity of the HF, which significantly increased the adsorption capacity of uranium. The results showed that the maximum adsorption capacity of HF-H 3 IMDC 3 is 469.48 mg/g at pH 7.0 and 313 K. Adsorption process was more suitable for the pseudo-second order model. Moreover, HF-H 3 IMDC 3 exhibited good selectivity and reusability. More importantly, the HF-H 3 IMDC 3 also presented excellent adsorption performance in natural seawater, indicating that HF-H 3 IMDC 3 has a great prospect for the extraction of U(VI) from seawater.
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
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Liwen Tang,Shaobo Ren,Tingting Zhang,Xin Wei,Mengting Li,Xueqiong Yin,Suying Wei
A sodium alginate (ALG)-based UO 2 2+ -imprinted thermoresponsive hydrogel (SUIT) was prepared, with NIPAM as the starting monomer. On this basis, another hydrogel (SPUIT) was prepared with ɛ -polylysine ( ɛ -PL) as a co-matrix to improve UO 2 2+ adsorption capacity and stability of the hydrogel. The SUIT and SPUIT were characterized with FTIR, DSC, SEM, TGA, XPS, and Raman spectroscopy. The maximum adsorption capacity of SUIT and SPUIT to UO 2 2+ was 137.43 mg/g and 205.99 mg/g, respectively. After simply washing the adsorbents with cold water, the desorption efficiency of SUIT and SPUIT reached 96.46% and 97.21%, respectively. The desorption efficiency of SUIT and SPUIT slightly decreased to 82.42% and 84.99% after 10 cycles of adsorption–desorption procedure. In the presence of other metal ions (Pb 2+ , Cu 2+ , Mg 2+ , Ca 2+ , UO 2 2+ , Cd 2+ , Na + , K + ), the selectivity coefficients of SUIT and SPUIT for UO 2 2+ /M n+ were in the range of 9.1–15.8 and 7.4–13.3. When tested with a 20 L real sea water, the adsorption capacity reached 58.24 µg/g for SUIT and 59.69 µg/g for SPUIT, demonstrating a high potential in accumulation of uranium. Moreover, the introduction of ɛ -PL enhanced the antibacterial activity and resistance to degradation of the hydrogel.
研究领域:
材料科学
·
环境科学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2018
·Vol. 317
·期 3
·1299-1309
·
IF 1.181
He Jiarui,Jin Jiali,Wang Zhenzhen,Yin Hongwei,Wei Congcong,Xu Xiaoping
Polyacrylic acid, Chitosan and nanosilica particles composite (PCNS) was prepared for enrichment of U (VI) from aqueous solutions. Adsorption tests controlled by different parameters including contact time, pH, initial concentration of UO 2 2+ and coexistence ions were examined. FTIR, SEM and EDX studies proved the formation of composite and confirmed efficient adsorption of UO 2 2+ by PCNS. The experimental datas fit the Langmuir and pseudo-second-order models, the R L (0.115–0.645) indicates the adsorption of UO 2 2+ onto PCNS are favorable. The value of q m (451.118 mg g −1 ) and adsorption–desorption experiments showed PCNS hydrogel can be reckoned as a high efficienct and sustainable material for removal of U (VI).
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
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-13
·
IF 4.011
Yuan Xiaoyu,Yin Chunyue,Zhang Yuanyuan,Chen Zengyue,Xu Yifan,Wang Jun
In this paper, a double hollow spherical shell composite modified with layered double hydroxide (C@Ni-Al LDH HSS) was fabricated for uranium(VI) (U(VI)) adsorption. Various batch experiments were carried out to investigate the influence of pH, concentration, time and coexistence ion on extraction. The results showed that the adsorption processes of U(VI) onto C@Ni-Al LDH HSS were spontaneous and endothermic and closely followed pseudo-second-order and Langmuir isotherm models. The equilibrium time and maximum adsorption capacity of C@Ni-Al LDH HSS was 360 min and 545.9 mg g −1 . FT-IR and XPS analyses proved that the adsorption behavior was primarily attributed to the strong interaction between oxygen-containing functional groups and U(VI). Moreover, the extraction of trace U(VI) (μg L −1 ) in artificial and natural seawater was also studied. The results showed that C@Ni-Al LDH HSS provided a promising application for the efficient extraction of U(VI) from seawater.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
Liu Zuohai,Li Xiang,Liu Daqian,Weng Xuchen,Huang Min,Liu Zhirong
During the tantalum ore smelting process, radioactive substances such as uranium and thorium accumulate in the slag, posing significant environmental risks if not properly treated. The traditional acid leaching method remains suboptimal for extracting these elements from tantalum slag. To address this limitation, this study employed aluminum salt as leaching aid, effectively enhancing uranium and thorium extraction efficiency. This approach offers a novel methodology for recovering uranium and thorium from refractory slag generated after tantalum ore smelting.
研究领域:
环境科学
·
核化学
·
冶金工程
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2025
·
IF 6.3
Yan Feng,Yuxi Li,Shengxuan Gao,Yue Tao,Ying Zhang
Background Inorganic materials with high O/N content for Uranium Extraction from Seawater (UES) show fast-adsorption rate, but practical applications are limited by their easy dispersion, difficult recovery, and poor selectivity. Therefore, inspired by the macroscopic large-area molding, antibacterial properties, and hierarchical porous microstructure of bamboo strips (BS), a nanoscale spindle-shaped phosphotungstic acid (PTA) loaded amidoximated BS (AOBS) as the inorganic/organic composite material with high O/N content is designed and applied to extracting uranium. Methods Under the effects of the hydrogen bonding crosslinking, the protonation process of -NH 2 , the physical limitations of PEG molecular chains, and others, a nanoscale spindle-shaped PTA loaded fibrous AOBS (PW 12 AOBS) is successfully synthesized by chemical cross-linking and hydrothermal methods. Significant Findings PW 12 AOBS has the super-hydrophilic surface and ultra-fast infiltration rate, so that it exhibits an excellent antibacterial performance and a super-fast adsorption rate. When the contact time is 5 mins, the adsorption capacity is 195.6 mg·g −1 , and a removal rate of uranium is 78.2 %. The highest removal rate of uranium is 82.6 %, and the adsorption capacity reaches 343.6 μg·g −1 in simulated seawater. The terminal OH/-COOH and bridging W = O from PW 12 AOBS synchronously act as the active sites for extracting uranium.
研究领域:
材料科学
·
环境科学
·
核化学
·
吸附分离
·
海洋资源利用
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Chunxiang Lin,Jinteng Chen,Zhihao Wu,Ruiyang Chi,Huiting Lin,Yifan Liu,Yuancai Lv,Xiaoxia Ye,Wei Luo
Uranium is a basic and strategic resource related to national development and security. The uranium resources contained in the ocean are thousands of times that in the land, up to about 4.5 billion tons. However, it is still a severe challenge for the extraction of uranium from seawater as it contains trace amounts of uranium and a large number of cations. Herein, a new uranium extraction material, phosphate-functionalized collagen fibers, was prepared by a “covalent cross-linking” method by grafting the phosphate functional groups onto the surface of collagen fibers (CF) with a multihierarchy structure and multiple functional groups. The special structure of CF makes the adsorbent exhibit multistage kinetics and is controlled by chemisorption and layer diffusion. Through the introduction of amino and phosphoric acid functional groups, collagen fiber-alendronate sodium trihydrate (CF-AST) exhibits high-efficiency adsorption for uranium with the maximum adsorption reaching 277.78 mg g–1. In the extraction test from the East China Sea, CF-AST displayed a total uranium extraction mass of 29.61 μg after processing 10 L of seawater with an extraction rate of 89.69%. This adsorbent has shown superiorities in selectivity, kinetics, capacity, and reproducibility of uranium separation and enrichment from seawater, which is an economically viable and industrially scalable realistic uranium extraction material.
研究领域:
材料科学
·
环境科学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2022
·
IF 11.211
Junqiang Zhang,Jiliang Ma,Gaojie Jiao,Kangning Liu,Rui Cui,Shangru Zhai,Runcang Sun
Designing an adsorbent with excellent practical application on uranium extraction from seawater is extremely difficult but urgent. Here, the poly(amidoxime) (PAO)/polyvinyl alcohol (PVA)/methyl 4-hydroxybenzoate (MeP) hydrogel (named as PP@MeP-H) was prepared using a simple and controllable ultralow temperature-solvent exchange two step strategy. With assistance of solvent exchange, MeP nanospheres anchored on the hydrogel network showed excellent antibacterial activity during the uranium adsorption from seawater. Furthermore, the hydrogel with 3D network porous structure allows uranium to easily and rapidly spread into its interior owing to its abundant porous and anti-biological pollution ion channels, which ensures maximum utilization of the effective adsorption sites on this adsorbent. The superior uranium extraction capacity achieved 162.64 mg g −1 , and the sample shows excellent stability and reusability . Interestingly, when the pH close to natural seawater , PP@MeP-H showed the highest uranium adsorption activity (153.30 mg g −1 ), and for 500 L of natural seawater, the uranium adsorption capacity achieved 3.12 mg g −1 after 21 days. Furthermore, experimental results showed that the O and N atoms of amidoxime group act as main bonding sites for uranium adsorption. As the discussed above, PP@MeP-H has excellent potential of uranium adsorption from natural seawater.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nuclear Science and Techniques
·
2023
·Vol. 34
·期 6
·1-12
·
IF 2.8
Ren Wan-Ning,Feng Xin-Xin,He Yu-Long,Wang Ming-Lei,Hong Wan-Feng,Han Hong-Wei,Hu Jiang-Tao,Wu Guo-Zhong
Direct collection of uranium from low uranium systems via adsorption remains challenging. Fibrous sorbent materials with amidoxime (AO) groups are promising adsorbents for uranium extraction from seawater. However, low AO adsorption group utilization remains an issue. We herein fabricated a branched structure containing AO groups on polypropylene/polyethylene spun-laced nonwoven (PP/PE SNW) fibers using grafting polymerization induced by radiation (RIGP) to improve AO utilization. The chemical structures, thermal properties, and surface morphologies of the raw and treated PP/PE SNW fibers were studied. The results show that an adsorptive functional layer with a branching structure was successfully anchored to the fiber surface. The adsorption properties were investigated using batch adsorption experiments in simulated seawater with an initial uranium concentration of 500 μg·L −1 (pH 4, 25 °C). The maximum adsorption capacity of the adsorbent material was 137.3 mg·g −1 within 24 h; moreover, the uranyl removal reached 96% within 240 min. The adsorbent had an AO utilization rate of 1/3.5 and was stable over a pH range of 4–10, with good selectivity and reusability, demonstrating its potential for seawater uranium extraction.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jia Lei,Huanhuan Liu,Fengchun Wen,Xinying Jiang,Changpeng Yuan,Qiang Chen,Ji-An Liu,Xudong Cui,Fan Yang,Wenkun Zhu,Rong He
Surface and interface engineering represents a powerful strategy for photocatalytic reduction of soluble hexavalent uranium (U(VI)) into insoluble tetravalent uranium (U(IV)). Herein, we fabricated surface oxidized tin disulfide nanosheets (O-SnS 2 ) on tellurium nanowires (Te@O-SnS 2 ) as highly efficient and stable photocatalysts for U(VI) removal from wastewater. In this system, the Te nanowires increased the surface negative charge and resulted in the injection of hot electrons into O-SnS 2 nanosheets, which facilitated the binding and reduction of U(VI) on the abundant surface defects of O-SnS 2 . Under the irradiation of simulated sunlight, the removal efficiency toward U(VI) by Te@O-SnS 2 reached 97.3% in 60 min with the initial U(VI) concentration of 8 mg/L. Additionally, the maximum extraction capacity of U(VI) by Te@O-SnS 2 reached 704.8 mg/g at the initial U(VI) concentration of 200 mg/L. Furthermore, the Te@O-SnS 2 exhibited remarkable resistence ability for the interfering ions and a U(VI) removal efficiency > 88.4% over a wide range of pH, and maintained a high U(VI) removal efficiency (>92%) during cycle tests at pH 4.8.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Shen-neng Wang,Xiao-yi Wu,Zhen-ni Yi,Fang Yang,Gang Song,Meng-hao Wang,Jia-yu Liu,Zi-yun Guo,Di-yun Chen,Jia-ping Lai,Hui Sun
In order to achieve the on-site rapid detection of trace uranium under excitation with visible light and avoid the harmful effect of toxic organic solvent to human body and organisms, in this work, a novel water-soluble, environmental-friendly and biocompatible aggregation-induced emission (AIE) fluorescence probe was fabricated by introducing the pyridine quaternary ammonium cation and amide group into the propeller structure of triphenylamine (TPA). And by creatively using bovine serum albumin (BSA) in PBS buffer as the sensitizing agent to replace the toxic organic solvent, the probe can emit intense red fluorescence under excitation with visible light (470 nm), exhibiting very low cytotoxicity and great anti-interference ability against large equivalent of different metal ions and anions over wide pH range. After further integration with the self-constructed portable fiber optical sensing system, the satisfying detection limit as low as 7.44 nM (1.77 ppb) can be achieved. The established method has been applied successfully for sensing uranium in complex real samples such as uranium leachate, seawater and cancer cells, demonstrating excellent analytical performance and great potential for in-situ rapid detection and timely evaluation of the uranium contamination in vivo and in field.
研究领域:
环境科学
·
分析化学
·
材料科学
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 13
·2259
·
IF 5.719
Peiyan He,Minghao Shen,Wanli Xie,Yue Ma,Jianming Pan
Uranium is an indispensable part of the nuclear industry that benefits us, but its consequent pollution of water bodies also makes a far-reaching impact on human society. The rapid, efficient and convenient extraction of uranium from water is to be a top priority. Thanks to the super hydrophilic and fast adsorption rate of microgel, it has been the ideal adsorbent in water; however, it was too difficult to recover the microgel after adsorption, which limited its practical applications. Here, we developed a uranyl-ion affine and recyclable microgel container that has not only the rapid swelling rate of microgel particles but also allows the detection of the adsorption saturation process by the naked eye.Keywords:microgel;self-assembly;adsorption
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）