JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·
IF 1.5
Yang Man,Li Zhanguo,Wang Yi,Lin Xiaoyan
In this study, a hydrogel-based strippable coating was expeditiously synthesised by employing hydrogen bonding between eco-compatible guar gum (GG), borax, and glycerol (Gly), thereby endowing the coating with excellent swelling capabilities and a high water retention capacity. This approach was specifically designed to navigate the intricate rheological management associated with strippable coating decontaminants. Through the incorporation of Prussian blue (PB), a material highly effective in adsorbing cesium (Cs), the solubility and diffusion of radionuclides within the hydrogel were significantly enhanced, thereby augmenting the decontamination efficacy of the hydrogel. The PB–GG–Gly composite demonstrated remarkable decontamination efficiencies, removing Cs from surfaces of glass, stainless steel, rubber, lacquer, and cement with percentages of 99.66%, 99.37%, 99.71%, 99.67%, and 83.83%, respectively.
研究领域:
材料科学
·
环境科学
·
放射性污染治理
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DOI
高影响因子
Journal of Cleaner Production
·
2019
·
IF 6.395
Fangzhu Xiao,Tao Huang,Shuwen Zhang,Longfei Liu,Cheng Wang,Guowen Peng,Shuya He
The fallout of the radioactive nuclide cesium (Cs) has posed its potential environmental threat to human health and ecosystem during the Fukushima accident. Thus, Cs decontamination from radioactive wastewater is strongly required for treating similar occurrences. In this work, a coupling method was applied to achieve Cs + removal and solidification in one conducting system. Ammonium molybdophosphate (AMP) was loaded to blast furnace slag (BFS) particles for the preparation of adsorbent (BFS-AMP) and binder. The maximum adsorption capacity of BFS-AMP for Cs + was 23.36 mg/g obtaining at the pH of 8 and the initial concentration of 500 mg/L in the equilibrium adsorption experiments. Cs + uptake confirmed to the pseudo-first-order kinetic model . Electrokinetics (EK) not only increased the adsorption capacity of BFS-AMP also enhanced the migration of Cs + ions from the anode to cathode in the electrolyzer . The transfer of Cs + ions from liquid to solid in the electrolyzer was controlled by both voltage gradients and flow rates. The solidification of EK-treated BFS-AMP mortar was mainly dominated by the mass ratios (wt.%) of alkali activator to adsorbent and the initial pH values. Cs + leaching from the solidified products of EK-treated BFS-AMP mortars ranged from approximately 1.18 × 10 −7 to 9.54 × 10 −6 g cm −2 ∙d −1 . The electromigration , geopolymer stabilization, and hydration encapsulation were concluded as the main incorporation mechanisms for Cs + ions transferring from the stock solution into the BFS-AMP-based solidification in the electrolyzer.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Can Liu,Yujie Li,Qi Liu,Jun Liu,Yafei Guo,Xiaoping Yu,Yingchun Xie,Tianlong Deng
The removal of 137 Cs from radioactive wastewater remains a huge challenge due to the interference of many coexisting ions. Several tin chalcogenides (X 2 Sn 3 Y 7 , X Na, K; Y Te, Se, S) were synthesized and screened for highly selective cesium removal from radioactive wastewater. It was found that Na 2 Sn 3 S 7 showed the best adsorption performance for low cesium concentrations. Especially after nickel doping, the adsorption capacity and thermal stability of the adsorbent were significantly enhanced. Its maximum adsorption capacity reached 436.72 mg·g −1 within only 5 min and adsorption performance kept active in the pH range of 2–12. After being coated with a porous polysulfone (PSF) fiber, the developed PSF-Na 2.1 Ni 0.05 Sn 2.95 S 7 was applied to natural complex water with cesium concentration of 17.58 mg·L −1 . The separation factors between Cs + and competitive ions ranged from 625.21 to 13123.21. It is noteworthy that NaNO 3 was an efficient regenerating agent and can be easily separated from the CsNO 3 mixture for cyclic utilization. Remarkably, only 45 min in each cycle of adsorption and desorption toward cesium was realized, and the adsorption properties hardly decreased even after 50 consecutive cycles. The above advantages make the proposed material an excellent candidate for efficient Cs + removal and enrichment from wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 7
·4458-4460
·
IF 1.134
Kim Jong Kyu,Yeo Wooseok,Joo Jin Chul
Among the various radioactive materials, Cesium is a major source of radioactive contamination and known to be the most dangerous radioactive material, can cause enormous damage to the ecosystem environment when released into the environment. Prussian Blue (PB) has been used as an adsorbent
to effectively remove cesium, however it has the problem of being difficult to separate in water. In this study, carbonyl iron (CI) which is known as ferromagnetic synthesized with precursor of PB (FeCl3 and potassium ferricyanide) to solve the problem of PB particles. Adsorption
isotherm experiments were also conducted to evaluate the cesium removal ability of the manufactured novel composites. The results obtained in the present study indicate that the novel composite has a cesium removal rate of 99.88% and a distribution coefficient value of 124,900 mL/g. Adsorption
behavior follows Langmuir isotherms and the maximum adsorption amount is (qm
) 79.3 mg/g. In conclusion, Nano-sized Prussian blue with carbonyl Iron prepared through this study has excellent cesium removal capacity, and it can be completely separated from water when used directly
in the cesium treatment field.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
Engineering
·
2019
·
IF 4.568
Shiyuan Ding,Lilan Zhang,Yang Li,Li’an Hou
In this study, a copper ferrocyanide/silica/polyvinylidene fluoride (CuFC/SiO 2 /PVDF) hollow-fiber composite membrane was successfully synthesized through a facile and effective crosslinking strategy. The PVDF hollow-fiber membrane with embedded SiO 2 was used to fix the dispersion of CuFC nanoparticles for cesium (Cs) removal. The surface morphology and chemical composition of the composite membrane were analyzed using scanning electron microscopy and X-ray photoelectron spectroscopy (XPS). The composite membrane showed a high Cs rejection rate and membrane flux at the three layers of CuFC and 0.5% SiO 2 , and its Cs rejection rate was not affected by variation in the pH (pH = 4–10). The modified membrane could be effectively regenerated many times using ammonium nitrate (NH 4 NO 3 ). The Cs selectivity performance was verified by an efficient Cs rejection rate (76.25% and 88.67% in 8 h) in a solution of 100 μg·L −1 of Cs with 1 mmol·L −1 of competing cations (K + and Na + ). The CuFC/SiO 2 /PVDF hollow-fiber composite membrane showed a particularly superior removal performance (greater than 90%) in natural surface water and simulated water with a low Cs concentration. Therefore, the CuFC/SiO 2 /PVDF hollow-fiber composite membrane can be used directly in engineering applications for the remediation of radioactive Cs-contaminated water.
研究领域:
环境工程
·
材料科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Lijun Meng,Lihan Liu,Senjian Han,Xuan Zhou,Jiayi Luan,Lina Xu,Shiqiang Wang,Tianlong Deng
Immobilization of metal ferrocyanides (MFCs) on the surface of substrate is supposed to be an efficient method for selectively removing cesium ions. In this study, the high adsorption performance of modified polyacrylonitrile membrane for Cs removal was fabricated by incorporating copper ferrocyanide (CuFC) nanoparticle via in situ acid-base reaction of carboxylated polyacrylonitrile (CPAN) and Cu(OH) 2 during the phase inversion process. Simultaneously, the induced coprecipitation reaction caused the uniformly embedded CuFC throughout the substrate of CPAN. The obtained CuFC-CPAN showed a preferred adsorption capacity of 331.65 mg g −1 and favorable selectivity in the presence of numerous coexisting ions. The experimental validation and characterizations suggested the adsorption mechanism was mainly ion exchange with a fraction of electrostatic attraction. The high pH stability and reusability make the CuFC-CPAN membrane a reliable choice for efficient Cs removal.
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 Cleaner Production
·
2023
·
IF 11.1
Can Liu,Haojie Ge,Linxue Yan,Xiaoping Yu,Yafei Guo,Nelson Belzile,Tianlong Deng
The removal of Cs from radioactive wastewater remains a great challenge due to the presence of a large number of coexisting ions. Herein, a novel porous fiber-supported metal tin sulfide named PVC-[Me 2 NH 2 ] 2 Sn 3 S 7 was designed. Specifically, four tin sulfides were prepared by the one-pot method in different solvents. Water was the most suitable solvent since it was essential for converting amides to cations. When three amides were used as precursors, [Me 2 NH 2 ] 2 Sn 3 S 7 prepared with DMF showed the best adsorption performance. Five polymers were then comprehensively evaluated around physicochemical stability, hydrophilicity , and cost to facilitate the engineering application of adsorbents. Finally, polyvinyl chloride (PVC) was selected as the support material. The optimized porous PVC-[Me 2 NH 2 ] 2 Sn 3 S 7 fiber with 50 wt% [Me 2 NH 2 ] 2 Sn 3 S 7 percentage can reach adsorption equilibrium within 30 min, has a wide active pH range of 2–12, and has a high adsorption capacity of 419.01 mg g −1 . When applied to simulated wastewater, the separation coefficients of Cs + and coexisting ions were above 1 × 10 4 . The Cs + adsorption enthalpy change was obtained by calorimetric study and simulation calculation. Even after 50 consecutive cycles, the removal efficiency barely decayed. The Cs + concentration could be enriched to 259.93 times that of the geothermal water . The above advantages make PVC-[Me 2 NH 2 ] 2 Sn 3 S 7 a promising adsorbent for selective Cs + removal from wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Can Liu,Xinru Li,Haojie Ge,Xiaoping Yu,Yafei Guo,Tianlong Deng
The extreme pH and complex composition of radioactive wastewater pose great challenges to the chemical stability and properties of adsorbents. Herein, three kinds of metal-doped tin sulfides were developed by a simple one-pot method for cesium removal. DFT calculations combined with experiments were conducted to reveal their structures, stability, and adsorption properties. It was found that the crystal structures of tin sulfide became more stable after doping by Ni and Al. Particularly, the Al-doped material (NAlSS) exhibited the highest stability and adsorption performance because of the highest −COHP value of the Sn-S bond in NAlSS and the low binding energy between NAlSS and Cs + . The industrial application of the powdery NAlSS was further solved by wet spinning using glutaraldehyde cross-linked sodium alginate and hydroxyethyl cellulose (SHG) as the supporters. The obtained salt-resistant hydrogel fibers (SHG-NAlSS) exhibited excellent adsorption performance and stability in wide pH (2 ∼ 12) and temperature (298.15 ∼ 328.15 K) ranges. The maximum adsorption capacity reached 401.34 mg·g −1 within 10 min. The material was successfully applied for Cs + removal from wastewater, and the distribution coefficient of Cs + reached 255020.33 mL·g −1 . After 10 adsorption–desorption cycles, the adsorbent maintained good stability. These results, along with the fixed-bed adsorption, demonstrate that the developed material can be used as a candidate for Cs + removal from radioactive wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 71
·45085-45092
·
IF 3.108
Yan-Rong He,Yang Yang,Zhao-Ya Huang,Wei-Juan Wang,Xiao-Long Li,Peng-Hao Zhang,Zhao-Yi Tan,Dong Zhang
The rapid development of the nuclear industry brings benefits for global economic development and solves the energy crisis. However, nuclear industrial activities produce a large amount of radioactive wastewater, which poses serious threats to environmental safety and human health, and 137Cs is considered one of the most abundant radionuclides in radioactive wastewater. In this study, we fabricated a new type of ferric ferrocyanide (Prussian blue, PB) functionalized graphene hydrogel (PB/rGOH) for Cs(I) removal. The as-prepared PB/rGOH shows a three dimensional network with PB nanoparticles uniformly distributed on the surface of the rGO sheets. The PB/rGOH could be readily separated from aqueous solution. Moreover, the volume of the composite could shrink to a small stiff bulk material, further reducing the volume of the waste. Kinetics experiments showed that Cs(I) adsorption on PB/rGOH fitted well with pseudo-second-order kinetic model, and the equilibrium data agreed well with the Langmuir model. As calculated from the Langmuir model, the maximum adsorption capacity at pH 5.0 is 58.82 mg g−1. The increase of pH from 3 to 7 could enhance the adsorption capacity, however, further increasing the pH value resulted in serious decomposition of PB nanoparticles. In conclusion, the PB/rGOH prepared in our work showed good performance on removal of Cs(I) in aqueous solution, and has a good application prospect in radioactive waste water treatment.
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 6
·2123-2134
·
IF 1.6
Ren Fan,Zhang Zhiquan,Xu Guangliang
In this research, composites of ZnO in the form of flowers with ZnFe Prussian blue analogues were prepared by in situ synthesis, and found the synthesis conditions with maximum removal efficiency. The flower-like ZnO enhances the dispersion of the ZnHCF nanoparticles, which means that the Prussian blue analogue has higher adsorption utilisation. In addition, various adsorption experiments revealed that the adsorbent has the best adsorption capacity under neutral aqueous solution conditions and is capable of high removal rate adsorption in multi-ion aqueous solution systems. Apart from this, the adsorption process satisfies a pseudo-second-order kinetic model, indicating that chemisorption dominates, and the Langermuir adsorption model suggests that adsorption occurs on a monolayer and is favourable, with a maximum adsorption capacity of 322.4 mg/g, while adsorption is a spontaneous, heat-absorbing process. Finally, a comparison with other Prussian blue analogues revealed the potential of flower-like ZnO/ZnHCF for efficient removal of Cs + from water.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 50
·31352-31364
·
IF 3.108
Youli Zong,Yongde Zhang,Xiaoyan Lin,Dong Ye,Dan Qiao,Shuangneng Zeng
A composite potassium copper ferrocyanide particle adsorbent (CMC–KCuFC) was fabricated in this study, based on the use of a carboxymethyl cellulose sodium (CMC) biopolymer cross-linked with Cu2+ via a syringe pump device, serving as an efficient biosorbent for cesium (Cs) ion removal and adsorption from wastewater, and was verified by SEM, EDX, FT-IR, TGA and XRD. Influencing factors in the adsorption of cesium were systematically investigated, including the pH of the solution, contact time, initial concentration, temperature and competing ions. The results demonstrated that use of the CMC–KCuFC adsorbent was feasible under a wide range of pH values (5–10). The cesium adsorption process was described by the Freundlich isotherm model. Meanwhile, the adsorption equilibrium time was reached within 600 min and the kinetic study showed it to be well fitted by the pseudo-second-order kinetic model. Moreover, all materials involved in the CMC–KCuFC adsorbent were biosafe and biodegradable. CMC–KCuFC is expected to be a potential adsorbent for continuous removal of cesium from wastewater.
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 Environmental Chemical Engineering
·
2021
·
IF 5.909
Hang SHEN,Lingdan ZHU,Qi LIN,Shujun GUO,Huagui ZHANG
To guarantee the sustainable development of the nuclear industry, it is vital to have a low-cost, green, and scalable route developed to synthesize efficient adsorbents for rapid and effective remediation of nuclide-contaminated water. In this study, a natural catechol derivative with unsaturated alkyl chain, urushiol, was aminated by mildly thiol-ene click with cysteamine to form a dopamine analogue, which can self-polymerize and trigger the formation of silicate plates into hydrogel framework and in-situ immobilize the potassium copper hexacyanoferrate, an efficient adsorbent, when hexacyanoferrate and excess Cu 2+ were present in the silicate suspension. The chelation between Cu 2+ , poly-urushiol and hexacyanoferrate that assemble the hybrid hydrogel was confirmed by SEM and XPS and the performance of this hydrogel was evaluated in terms of adsorption capacity (214 mg g −1 ), selectivity (K d >10 6 mg L −1 ), kinetics and reversible self-healing behavior with pleasing results obtained. The economic and nature-sourced property of the urushiol offers a green and novel concept to develop a satisfying adsorbing system for Cs + removal.
研究领域:
环境科学
·
材料科学
·
核工业
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）