HYDROMETALLURGY
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2019
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IF 3.465
Zhenning Lou,Mengnan Huang,Junshuo Cui,Shuyao Wu,Shanshan Xing,Peng Zhou,Weijun Shan,Ying Xiong
Technetium ( 99 Tc), a radionuclide generated from uranium fission in nuclear reactors, has posed a major threat to humans due to its long half-life and radioactivity. Therefore, it is urgent to develop a strategy of selectively and efficiently capturing of 99 Tc. In this work, a series of solid copolymers (denoted as DVB-[C x ClVim][Cl]) were synthesized for efficient adsorption of perrhenate (ReO 4 − , a surrogate for TcO 4 − ) from mixed ions solution. The adsorbents with vinylimidazolium-based ionic liquid as functional group and divinylbenzene (DVB) as the basic framework exhibited stable structure and good ReO 4 − adsorption performance. The influences of the linear n-alkyl chain length on the morphology and adsorption property of the copolymers were discussed in detail. The maximum uptake of Re(VII) on DVB-[C 4 ClVim][Cl] was 517.61 mg·g −1 . Rhenium could be separated from molybdenum in the presence of co-anions and co-cations by DVB-[C 6 ClVim][Cl], which demonstrated its good adsorption selectivity . The kinetic studies showed that pseudo-second-order model was more suitable for describing the behavior of Re(VII) adsorption. The adsorption mechanism was ion-exchange between Cl − and ReO 4 − confirmed by FI-IR, IC and XPS analysis. Additionally, DVB-[C x ClVim][Cl] remained effective Re(VII) capture ability after eight adsorption/elution cycles, demonstrating their good reusability.
研究领域:
环境科学
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材料科学
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放射化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
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2024
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IF 10.7
Yuruo Zheng,Ghulam Hussain,Changcheng Zheng,Xiaoqi Zhou,Man Zhang,Suirong Xie,Qianhe Yin,Shuyi Li,Batool Shanta,Xiawa Wang
Structure engineering is a powerful tool for tuning various properties and making CoFe2O4 (CFO) a prime candidate for electrocatalyst applications, especially in improving the oxygen evolution reaction (OER) performance. In this work, we explored rhenium substituents to replace cobalt and iron atoms of the CFO and obtained significant differences with the same doping level. The sol–gel process was employed to prepare the nanoparticles of Co1−zRezFe2O4 and CoFe2−zRezO4 (z = 0, 0.05). A detailed structural evaluation using Mössbauer spectroscopy verified the pure phase cubic spinel-type structure with a noticeable change in morphology by substituting Re. The OER and electrochemical impedance spectroscopy (EIS) were performed and showed better performance in the Fe-site doped structure. To explain the differences in the OER performance of the samples, X-ray photoelectron spectroscopy (XPS) on all elements, low-temperature Raman, and the density of states simulated by density-functional theory (DFT) were performed. We found that Re actively changed the properties of the structures and the doping on Fe-site enabled more oxygen vacancy and a higher ratio of cations in octahedral sites, which led to enhanced catalytic performance. This work provides a deep insight into the mechanism that influences the OER properties with Re doped in different sites, indicating a promising application of CFO as a catalyst material.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Mu Ding,Lang Chen,Yuwei Xu,Bo Chen,Jie Ding,Rulei Wu,Chao Huang,Yi He,Yongdong Jin,Chuanqin Xia
99 Tc is a β-emitting radionuclide with high fission yield, long half-time and it is urgent to remove Tc from liquid radioactive waste due to its potential toxicity for human. Herein, we presented a viologen-based cationic organic polymer (VBCOP) as a novel adsorbent with cationic sites and functional groups for efficient capture of Re/Tc(VII, IV) from aqueous medium. The results showed that this material could rapidly remove TcO 4 − /ReO 4 − from aqueous solution within 5 min and the maximum sorption capacity for Re(VII) could reach up to 444 mg g −1 , and the distribution coefficient ( K d ) towards Re(VII) and Tc(VII) reached 4.0 × 10 5 and 7.2 × 10 5 mL g −1 , respectively. And more, the adsorption mechanism was also studied by X-ray photoelectron spectroscopy (XPS), Energy dispersive spectrometer (EDS) mapping and Ion chromatography (IC), the results suggested an ion-exchange process in which the Cl − in this material was replaced by ReO 4 − . Additionally, we investigated its adsorption mechanism towards low-valent Re which was prepared by reducing ReO 4 − with NaBH 4 , and the flexible tetraaza macrocycle introduced in the material chelated with Re(IV) was confirmed by X-ray photoelectron spectroscopy (XPS) and Extended X-ray absorption fine structure (EXAFS) analysis. In general, the research exhibits a new sorbent material that can remove both TcO 4 − /ReO 4 − and the low-valent Tc/Re, and provide a new strategy to treat radioactive waste containing Tc with different valences.
研究领域:
放射化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2025
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IF 6.2
Juan Cai,Boyan Zhang,Jiatao Dang,Yunpeng Zhao,Dingcheng Liang,Qiang Xie,Jinchang Liu
The migration, transformation, and enrichment of strategic metal elements in coal in the process of coal processing and utilization are significant for their effective extraction and application. In this work, the migration, transformation, and enrichment of Li, Ga, Ge, In, and Re during coal pyrolysis were investigated by six-step sequential chemical extraction. The results showed that Li mainly exists in a residual state in raw coal and pyrolytic products under 500 ℃; however, the content of sulfide state Li increases largely when the pyrolysis temperature exceeds 500 ℃. Ga mainly enriches in residual form, and the content of Ga in the residual state rises with the pyrolysis temperature increasing. Ge mainly presents in the form of carbonate-binding state, sulfide state, and residual state. As the temperature rises to higher than 500 ℃, Ge combines with the carbon and oxygen compounds produced by pyrolysis to form a carbonate-binding state, resulting in a significant increase in its content. The content of Ge in the residual state also increases significantly. The ratio of carbonate-binding state and organic state In gradually decreases with the increase of pyrolysis temperature, while that of residual state In gradually increases. Due to the low content of Re, the reliability of the test results is poor. However, Re may exist in sulfide, organic, and residual states. With the pyrolysis temperature increasing, Li, Ga, Ge, In, and Re in pyrolysis products are more likely to combine with aluminosilicate than those in raw coal.
研究领域:
能源科学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
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2017
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IF 3.101
Tao Wu,Zhifen Wang,Hai Wang,Zhiqiang Zhang,Luc R. Van Loon
The through-diffusion method was employed to investigate the effect of the salt concentration on the diffusion behaviour of Re(VII) and Se(IV) in compacted bentonite . The accessible porosity , ε acc , of Re(VII) increased from 0.25 to 0.38 with an increase of the ionic strength from 0.1 to 1.0 mol/L. The dependency of the accessible porosity ε acc on the salt concentration could be described approximately by a first-order decay exponential function. The interlayer porosity of GMZ bentonite was 21% of the total porosity at a bulk dry density of 1600 kg/m 3 at 12 °C. The D e values of Re(VII) and Se(IV) increased from 2.6 × 10 − 11 to 6.1 × 10 − 11 m 2 /s and from 1.6 × 10 − 11 to 4.7 × 10 − 11 m 2 /s in GMZ bentonite with an increase of the ionic strength from 0.1 to 1.0 mol/L, respectively. In the case of Se(IV), the adsorption showed a different ionic strength dependency in GMZ bentonite and montmorillonite . The ionic strength has no significant effect on the adsorption (K d = 1.8 × 10 − 4 m 3 /kg) on GMZ bentonite, indicating the formation of inner-sphere surface complexes. In the case of synthetic montmorillonite, the K d values increased with increasing ionic strength. This can be explained by the fact that the electric potential of surface sites becomes less negative with increasing ionic strength resulting in an increase in the adsorption of Se(IV) at a pH above the point of zero salt effect (PZSE). The D e values of both Re(VII) and Se(IV) increased with increasing salt concentration. Both anions are totally excluded from the interlayer space and partially from the diffuse double layer. Ionic strength alters the effective diffusion coefficient of anions by controlling the thickness of the diffuse double layer. Anion diffusion data from the literature (effective and apparent diffusion coefficients) were satisfactorily evaluated by Archie's relation.
研究领域:
环境科学
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地球化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2020
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IF 2.369
Cai-bin Zhou,De-song Zhan
The extraction process of rhenium was investigated in the room-temperature ionic liquid 1-pentyl-3-methylimidazolium bis((trifluoromethane)-sulfonyl)imide ([C5mim][NTf2]) containing N235. At ionic strength ranging from 0.2 to 2.0 mol·kg–1 and temperatures ranging from 293.15 to 318.15 K, the molalities of perrhenate in the aqueous phase were obtained at an extraction equilibrium. The standard extraction constants K0 at diverse temperatures were gained by the Pitzer polynomial approximation method. Thermodynamic characters for the extraction procedure were calculated.
研究领域:
化学工程
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材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Xiaolong Deng,Maolin Tian,Jian Cui,Hongtao Liu,Wenjie Zhang,Zhen Shang,Jiawei Wen,Guoyong Huang,Shengming Xu
The sustainable recovery and value-added utilisation of active metals, Pt and Re, from spent reforming catalysts represents a significant challenge in the context of industrial catalyst recycling.This study proposes an enhanced method for the selective separation and high-value utilisation of Pt and Re through the implementation of sodium roasting and weak base leaching processes.The integration of these two processes resulted in phase separation, whereby Re and Al were preferentially dissolved, while Pt was concentrated in the slag phase. Subsequent adsorption on an ion exchange resin exhibited excellent selectivity for Re/Al separation, with adsorption and desorption efficiencies of 99.67 % and 99.82 % for Re, respectively.The residual Pt was effectively recovered by oxidative acid leaching, with a combined recovery of 98.89 %.In view of the presence of trace Fe in the leach solution, the potential synergistic effect of Pt utilisation was further explored in this study. The prepared Pt/Fe@C-M intermetallic catalysts exhibited excellent electrocatalytic performance for HER, with an overpotential of 28 mV at 10 mA⋅cm −2 , which exceeded that of commercially available Pt/C catalysts.The improved performance is attributed to the beneficial electronic effect of iron in the catalyst structure. A cost-benefit analysis of the integrated recovery and value-added process was conducted, demonstrating significant commercial viability, with a net profit of $549.89 per kilogram of spent catalyst.
研究领域:
化学工程
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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
ACS Applied Polymer Materials
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2024
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IF 4.4
Jiang Liu,Zhaoheng Zhu,Yukun Huang,Long Wang,Kai Jia
There is a critical need to develop cost-effective and efficient adsorption materials for the removal of technetium-99 (99Tc) from contaminated water sources. This research presents the synthesis of amino-modified cellulose microspheres (CM-APTS) through the addition of 3-amino-propyl triethoxysilane (APTS) to regenerated cellulose microspheres (CM), followed by a subsequent reaction with ethylene dibromide (EDB) to produce halogen-modified amino cellulose microspheres (CM-APTS-EDB). These are engineered for the effective absorption of ReO4–, serving as a chemical surrogate for TcO4–. By altering the amount of ethylene dibromide used, two variations of bromine-modified cellulose microspheres, CM-APTS-EDBs and CM-APTS-EDBe, are synthesized. Among these, CM-APTS-EDBe exhibits robust adsorption capabilities for ReO4– across a pH spectrum of 2.5–10, attaining a peak capacity of 281 mg·g–1, and demonstrates selective adsorption of ReO4– even in the presence of competing anions such as NO3–, Cl–, and SO42–. Characterization through X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared spectroscopy (FTIR) indicates that the adsorption mechanism predominantly involves interactions between ReO4– and N+, hydrogen bonding with amino hydrogen, and σ-hole-anion interactions between Re–O and C–Br. After eight adsorption–desorption cycles, CM-APTS-EDBe retains notable stability and reusability. Additionally, the material efficiently captures ReO4– from simulated Hanford Low Activity Waste (LAW) wastewater, achieving an adsorption efficiency of 77.26% at a solid–liquid ratio of 40 g·L–1. This investigation underlines the potential of halogenated regenerated cellulose microspheres in designing advanced adsorbents for the removal of radioactive pollutants like TcO4–/ReO4–, offering a strategy for environmental remediation efforts.
研究领域:
环境科学
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放射化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Xianquan Cai,Linghao Kong,Xingyun Hu,Xianjia Peng
Strongly acidic wastewater generated from the molybdenum and copper smelting process is of great value for recycling sulfuric acid and valuable metals, such as rhenium (Re). Herein, a high Re(VII) (HReO 4 ) recovery efficiency of 99% within 35 min from strongly acidic wastewater was successfully achieved by using sulphide coupled with ultraviolet (UV) light, and soluble Re(VII) precipitated as Re 2 S 7 in this process. Mechanistic experiments showed that the intermediate Re-S species (i.e., HReO 3 S) was the dominant limitation responsible for Re(VII) precipitation in the dark, and UV irradiation dramatically accelerated the generation and conversion of HReO 3 S by inducing the formation of HS• and H•. The H• produced from the photodissociation of H 2 S promoted HReO 4 transformation to H 2 ReO 4 •, which rapidly reacted with HS• to produce HReO 3 S, accelerating the conversion of HReO 4 . The radical-induced acceleration can also take place during the HReO 3 S conversion by slowly introducing H 2 S into the strongly acidic wastewater to continuously produce H• and HS•. This work offers an insight into the improvement of Re(VII) recovery by UV light, which can be potentially applied into resource recovery from strongly acidic wastewater.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
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2023
·
IF 5
Xingsheng Liu,Shengyuan Zhao,Wan Xu,Huijuan Zhang,Siyuan Lu,Zhenbin Chen,Fangfang Niu,Gang Wu
With decreasing global rhenium resources, it has become important to separate and purify rhenium in secondary resources, so a preparation strategy for a chitosan-comodified surface-grafted thermosensitive ion-imprinted composite membrane (CS-Re-TIICM) was developed in this work. The key of this design was that the two ends of a poly(N,N-diethylacrylamide) (PDEA) chain were grafted onto the imprinted polymer separating the layer matrix and the surface of the membrane, respectively, which aimed to improve the selectivity and desorption ratio of this material simultaneously. The structure and morphology of this material were characterized by FTIR and SEM, respectively. In addition, CS-Re-TIICM was applied to the secondary leaching solution of the high-temperature alloy to test the actual separation effect, and results showed that CS-Re-TIICM, possessing thermoresponsive recognition sites, and the structure of the imprinting cavity could be adjusted by temperature, which helped this material achieve good selective separation and purification performance for ReO4–. The maximum adsorption capacity was 0.1071 mmol/g at 35 °C. CS-Re-TIICM not only showed an excellent selectivity (separation ReO4–/MnO4– of 3.90 in the presence of interfering ion MnO4–) but also presented an excellent desorption performance (desorption ratio of 68.94%) and good reusability (adsorption capacity of 0.0425 mmol/g, desorption ratio of 59.13%, and separation degree of 1.24). When CS-Re-TIICM was applied to the secondary leaching solution of high-temperature alloys, the purity of Re was increased from 35.41% to 65.10% after one adsorption/desorption cycle, which depicted a prospective application in the industrialized separation of ReO4– from a complex environment.
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 Materials Research and Technology-JMR&T
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2024
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IF 6.2
Ruxia Liu,Wei Zhao,Ye Tian,Jian Zhang,Guoqiang Luo,Qiang Shen
TaC enhancement particles and Re alloy were used to improve the strength and ductility of the tungsten alloy. The synergetic effect of TaC addition and Re alloying on relative density, microstructure, and mechanical properties of tungsten alloy were investigated. The results indicated that a W-based composite with 2.5 wt% TaC addition and 25 wt% Re alloying exhibited yield stress of 1.23 GPa, the ultimate compressive stress of 2.86 GPa, bending strength of 1.30 GPa and strain capacity of 42 %, which was increased by 114 %, 140 %, 226 %, and 133 % than those of pure W. Further analysis revealed that the grain boundary purification, grain refinement, and kinematic strain gradient contribution because of the addition of TaC, lattice distortion, and the generation of dislocations because of the addition of Re alloying are the main strengthening mechanisms in W–TaC-Re composite.
研究领域:
材料科学
·
力学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Yixin Pan,Yanbin Cai,Lujia Chen,Leilei Sun,Liping Deng,Rui Huang
In this study, nanoscale zero-valent iron was successfully soldered onto graphene oxide to synthesize nZVI/rGO nanocomposite by an improved modified Hummers' method. The nZVI/rGO nanocomposite was used to remove Re(VII) in water remediation , which was utilized as a replacement for the radioactive element of Technetium-99 (99Tc). The results showed that nZVI/rGO could effectively remove Re(VII) at pH = 13 with a removal efficiency of 99.1 %. rGO can effectively inhibit the aggregation of nZVI and significantly improve the removal performance. The removal capacity of nZVI minus the removal capacity of rGO in the composite was as high as 468.8 and 474.9 mg/g, respectively, corresponding to the mass ratio of Fe 0 :rGO = 1:1 and 1:2. However, the removal capacity of pure nZVI was only 33.5 mg/g, and that of the pure rGO was 42.6 mg/g. The removal capacity of Re(VII) by nZVI/rGO was not affected by cations of Na + , Ca 2+ , K + , and Mg 2+ ions. The removal efficiency of Fe 0 :rGO with a mass ratio of 1:1 and 1:2 was still higher than 60 % (63.5 % and 67.1 %, respectively). The results of this study demonstrate that the graphene oxide-based zerovalent iron nanocomposite under an appropriate mass ratio, can economically and efficiently remediate rhenium heavy metal ions in high pH water environments.
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
危险品化学品经营许可证（带存储）