JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2026
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IF 1.7
Wang Guohua,Luo Xu,Tian Jie,Lv Wenbo,Zhang Jiale,Yi Zhuhu,Tong Jun,Li Shiyou
In this study, a novel phosphorus-doped kitchen waste biochar (P-KWBC) was prepared through sodium phosphate-assisted copyrolysis. This simple and low-cost adsorbent achieved a remarkable uranium adsorption capacity of 655.13 mg/g under weakly acidic conditions (pH = 4, 313.15 K), which was more than 500% greater than that of kitchen waste biochar. After five consecutive adsorption‒desorption cycles, the material maintained a high uranium removal efficiency of 90.93%. Quantitative mechanism analysis confirmed that ion exchange (41.09%), mineral precipitation (28.23%), π–π interactions (19.69%), and coordination (10.97%) dominated U(VI) removal. This work provides a waste-to-wealth strategy for simultaneous kitchen waste reuse and uranium-contaminated wastewater treatment.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123612
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IF 7.5
Jinfeng Li,Qianwen Wang,Bo Tian,Zhigang Li,Nan Zhang,Jianwei Zhang,Wa Gao,Haijiao Xie,Haifeng Gu,Hongtao Zhao
Metal-organic framework (MOF)-based functionalized composites with enhanced properties are usually made by pre-functionalization and post-synthetic strategies. However, some reported modification methods still suffer from low modification degree and high energy consumption. Herein, a γ-irradiation-induced cationic MOF (NiBTAB-γ) is selected to be the host to encapsulate HPO 4 2- by an ion-exchange method as a novel strategy for MOF functionalization and for the first time applied to the uranium adsorption. The combination of the irradiation method and ion-exchange makes synthetic process much milder and more energy-efficient. The HPO 4 2- can substituted Cl - counterions in the void spaces, which creates abundant phosphate functional sites and maintains the structural integrity. Consequently, the resulting HPO 4 2- balanced MOF (PN-0.50) exhibits excellent adsorption performance for radioactive uranium with high adsorption capacity ( q max =342.0 mg/g at pH=5.0 and T = 298 K) and excellent selectivity. Electrostatic potential analyses and DFT calculations reveal that the introduction of HPO₄²⁻ not only optimizes the initial capture of uranium ions by enhancing the local negative electrostatic potential but also achieves stronger binding via strong chemical coordination bonds. This work provides new insight into the functionalized modification of MOFs for U(VI) removal from wastewater.
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SOLID STATE SCIENCES
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2020
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IF 2.434
Chao Jiang,Yan Liu,Dingzhong Yuan,Yun Wang,Jinbiao Liu,Jia Wei Chew
In this study, polyphosphazene microspheres (PZS) was prepared by reaction under ultrasonic conditions using hexachlorocyclotriphosphazene (HCCP) and 4,4-dihydroxydiphenyl sulfone (BPS) as raw materials. Phosphoric acid-functionalized microporous carbon materials (denoted as CS-PO 4 ) was further derived from PZS by carbonization and functionalization. The structure of CS-PO 4 was characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The adsorption properties of CS-PO 4 for uranyl ions in aqueous solution under different conditions (namely pH, contact time, initial concentration and temperature) were investigated. The results indicate that the optimum pH for adsorption was 6 while the equilibrium time was about 40 min. The maximum adsorption capacity was about 1029.8 mg/g, as calculated by the Langmuir model. The comprehensive analysis of the adsorption thermodynamics and kinetics show that the CS-PO 4 can be used to adsorb U(VI) effectively in solution.
研究领域:
环境科学
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材料化学
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放射化学
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吸附技术
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Journal of Cleaner Production
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2023
·
IF 11.1
Jiayi Li,Weixing Han,Heyao Liu,Minhua Su,Diyun Chen,Gang Song
The development and use of clean energy produced by nuclear power plants is becoming a major international trend, but it will inevitably lead to the problem of radionuclide pollution. Radioactive nuclear wastewater containing Cs and U and produced as a byproduct of coastal nuclear power production can cause substantial environmental pollution . In order to simultaneously remove radioactive cesium and uranium, polydopamine (PDA) inlaid ammonium phosphomolybdate (AMP) has established a hydrophilic functional structural film on the surface of Fe 3 O 4 , forming AMP@PDA@Fe 3 O 4 (APF) which is used to simultaneous remove Cs(I) and U(VI). Using the pH sensitive range of APF adsorption in the process of adsorbing Cs(I) and U(VI), synergistic adsorption can be achieved under the condition of weak acidity to neutral. The effects of temperature, and common cations on Cs(I) and U(VI) adsorption by APF were investigated, the adsorption was found to be sensitive to the presence of K + . The efficiency of Cs(I) and U(VI) adsorption by APF was 99.88% and 98.39%, respectively. The Cs(I) adsorption process was primarily ion exchange with NH 4 + within APF composite, whereas that for U(VI) was primarily C-O complexation. Both the Cs(I) and U(VI) adsorption reactions were consistent with second-order kinetic and Langmuir isothermal adsorption models. After five cycles of experiments the removal efficiency of Cs(I) and U(VI) can reach 64.88% and 79.81%, respectively. APF was also found to have high selectivity for Cs and U in seawater with high salt content at pH 6.0–7.0. In mimic contaminated seawater, the efficiency of Cs(I) and U(VI) removal was 97.65% and 84.63%, respectively. These findings provide references for the remove of Cs(I) and U(VI) from radioactive wastewater , making the process of energy production safer.
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高影响因子
Journal of Water Process Engineering
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2023
·
IF 7
Yan Wang,Yong Zhang,Xiaolin Liu,Sen Sun,Shiyi Qin,Jiaqi Huang,Bowei Chen
Polydopamine-coated phosphate-intercalated Mg Fe layered double hydroxides (PDA/phos-LDH) were fabricated to capture U(VI). Phosphate was intercalated in the layers of LDH because of its strong affinity for U(VI) species and the PDA was employed to provide massive binding sites for U(VI) by promoting the dispersion of LDH in the matrix. Experimental results revealed that the introduction of phosphate and PDA significantly increased the removal amount for U(VI) because of the increased functional groups (including PO 4 3− , -OH, -NH 2 and aromatic ring). The highest removal amount of PDA/phos-LDH (pH = 3.0, T = 298 K) reached 912.0 mg/g within 60 min, which was higher than many other LDH-based adsorption materials. After 5 repeated uses, the uptake percentage was still as high as 81.4 %. In addition, the excellent dynamic adsorption performance further confirmed the potential of PDA/phos-LDH in the actual processing of U(VI)-containing wastewater. Ion exchange, complexation, electrostatic attraction, cation-π interaction and precipitation were confirmed to play prominent roles in U(VI) removal. In a word, PDA/phos-LDH was an exceptional adsorbent for U(VI) immobilization.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Zengqiang Ci,Yanxue Yue,Jingting Xiao,Xinshui Huang,Yubing Sun
Nanoscale zero-valent iron (nZVI)-based composites have been widely utilized in environmental cleanup due to their low cost, high adsorption performance and strong redox activity. Herein, removal mechanism of U(VI) on nZVI/clay composites was demonstrated by batch, XPS and modeling techniques. The batch experiments showed that nZVI/clay composites exhibited the high removal capacity (88.90 mg/g at pH 4.0) and good regeneration towards U(VI) from aqueous solution. The adsorbed U(VI) was mostly reduced to U(IV) by nZVI/clay composites according to XPS analysis. The removal process of U(VI) on nZVI/clay composites was satisfactorily fitted by surface complexation modeling using strong and weak sites, indicating the high chemisorption of U(VI) on nZVI/clay composites. However, the fitting results underestimated U(VI) adsorption at pH 7.0–9.0 due to the reduction of U(VI) into U(IV), whereas the overestimation of U(VI) at pH 4.0–6.0 could be attributed to fewer surface complexation reaction involved. These findings are crucial for the application of nZVI-based composites for the highly efficient removal of radionuclides in actual environmental remediation.
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PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 29
·期 45
·68320-68331
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IF 5.19
Luo Qie,Cui Wenzheng,Wang Huan,Xiao Bo,Chen Lei,Wang Youqun,Zhang Zhibin,Liu Yunhai,Cao Xiaohong
The separation of magnetic adsorbents from aqueous solutions is made simple by using an external magnetic field. Herein, magnetic Zr(IV)-ethylenediamine tetramethylene phosphonic acid (EDTMPA) hybrids (MZrOP- x -T, x , and T were the different quality of Fe 3 O 4 @C and temperature in the synthesis process, respectively). A study was conducted on the uses of MZrOP- x -T in the capture of U(VI). The influences of pH, adsorption period, initial concentration, and temperature were all investigated. Furthermore, the desorption and reusability of the materials were explored. The optimal values of x and T were 0.2 g and 100 °C, respectively. At 298.15 K, the maximum adsorption capacity of MZrOP-0.2-100 was 330.30 mg·g −1 . The current research demonstrates that MZrOP-0.2-100 is a potentially effective material in removing U(VI) from radioactive solution.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Xin Zhong,Yuxin Liu,Tao Hou,Yuling Zhu,Baowei Hu
The efficient, safe, low-cost and easy to treatment of uranium(U(VI))-containing wastewater is still an imminent problem. Herein, the hierarchical hollow-spherical bismuth tungstate (Bi 2 WO 6 ) was prepared by hydrothermal method, and sufficiently characterized by morphology and photoelectrochemical properties. In this research, we not only discussed the adsorption performance of U(VI), but also investigated the photocatalytic reduction performance of U(VI), so as to provide technical support for the treatment of U(VI)-containing wastewater in the future. The adsorption procedure complied with the pseudo-second-order model, implying surface complexation or chemisorption . Besides, under visible-light irradiation lasting for 600 min, the photoreduction removal rate of U(VI) was 53% (just adding 2.0 mg Bi 2 WO 6 ), without adding the h + scavenger, due to the harvest absorption of solar energy, hierarchically porous structure and synergic effect of adsorption and photocatalysis . Furthermore, the adsorption mechanism and photocatalytic reduction mechanism of Bi 2 WO 6 for U(VI) were revealed. The metal 3O and O3H bonds in Bi 2 WO 6 crystal were the active coordination sites for U(VI) adsorption, while •O 2 − and e - were the main active species for U(VI) photocatalytic reduction. Although the mechanisms of adsorption and photocatalytic reactions were different, there was a synergistic effect in the process of practical for application removing U(VI) by Bi 2 WO 6 . Consequently, the hierarchical nanosheets-assembled Bi 2 WO 6 microspheres could be considered as a good candidate for visible-light-responsive photocatalyst in radioactive wastewater treatment.
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CHEMICAL ENGINEERING JOURNAL
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2021
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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.
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Journal of Environmental Chemical Engineering
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2021
·
IF 5.909
Binliang Wang,Junli Zheng,Yingying Li,Adel Zaidi,Yiwei Hu,Baowei Hu
Exploitation of algal biochar is a profitable opportunity for the utilization of filamentous green algae due to its sustainable growth and ease of harvest. In this study, Rhizoclonium -derived biochar (CB) and δ-MnO 2 -modified biochar (MnO 2 /CB) were fabricated for uranium (U(VI)) removal. The results showed that the δ-MnO 2 modification increased the BET surface area and decreased the isoelectric point. The maximum sorption amount of U(VI) by the MnO 2 /CB reached up to 100.2 mg/g (pH = 6.0, 289 K, and 0.01 M NaCl), which was two times higher than that of the CB. After five consecutive sorption/desorption cycles, the affinity of the MnO 2 /CB for U(VI) maintained in 94.8%. According to the analysis of X-ray photoelectron spectroscopy, it confirmed that the U(VI) sorption was mainly ascribed to the surface complexation between U(VI) and oxygen-containing functional groups on the surface of the MnO 2 /CB. Therefore, this investigation not only encourages the development of algal biochar derived from the filamentous green algae but also provides a novel adsorbent for U(VI) removal from aqueous solutions.
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ENVIRONMENTAL POLLUTION
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2020
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IF 6.793
Minhua Su,Zequan Liu,Yanhong Wu,Hairong Peng,Tao Ou,Shuai Huang,Gang Song,Lingjun Kong,Nan Chen,Diyun Chen
Water contamination caused by radionuclides is a major environmental issue . Uranium (U) belongs to the actinide group of elements. Hexavalent uranium (U(VI)) is radioactively and chemically harmful and highly mobile in the environment and wastewater stream. Therefore, developing highly efficient materials for minimizing the environmental impact of U(VI) is essential. To achieve this goal, we successfully synthesized a novel material, namely graphene oxide (GO)/hydroxyapatite (HAP), by directly assembling GO and HAP through a facile hydrothermal method, which exhibits effective U(VI) removal and immobilization. The GO/HAP composite has an outstanding sorption capacity for U(VI) (i.e., 373.00 mg/g) within 5 min at a pH of 3.0. The parameters from thermodynamic analysis indicated that the GO/HAP composite absorbed U(VI) through a process of spontaneous and exothermic adsorption. XPS , XRD, and FT-IR results revealed that the composite’s phosphate group was mainly responsible for U(VI) retention and incorporation. The GO/HAP composite’s enhanced U(VI) sorption capacity is most likely ascribed to the synergistic effect after functionalizing with nano HAP. The current findings may greatly facilitate the creation of rational design strategies to develop highly efficient materials that can treat radioactive wastewater .
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PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2018
·Vol. 317
·期 3
·1419-1428
·
IF 1.181
Ouyang Jinbo,Wang Yun,Li Tianqi,Zhou Limin,Liu Zhirong
The carboxyl-modified multiwalled carbon nanotubes were immobilized in chitosan-based composite membranes (CS-CNTs) which were used as efficient sorbents for U(VI) sorption. The incorporation of CNTs in the CS-CNTs membranes improves their mechanical strength as well as U(VI) sorption performance. XPS analysis indicates that both amine and carboxyl groups are responsible for the complexation of U(VI). The sorption kinetics followed the pseudo-second order equation, whereas the sorption isotherms fitted well with Langmuir model ( q m = 126.7 mg g −1 at 298 K). Moreover, the U(VI)-loaded CS-CNT8 can be effectively desorbed by 0.2 M acidified EDTA and reused.
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