Electrosorption of uranium (VI) from aqueous solution by phytic acid modified chitosan: An experimental and DFT study

Huang, Jie; Huang, Bin; Jin, Tianxiang; Liu, Zhirong; Huang, Dejuan; Qian, Yong

doi:10.1016/j.seppur.2021.120284

Cited by 63 publications

(8 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Overall XPS surveys of the counterpart after binding to U(VI), labeled as MS@PDA@PA‐U were obtained to verify the existence of U ions, as shown in Figure 8b. The U 4 f spin orbitals split into U 4f 5/2 and U 4f 7/2 , corresponding to peak at 391.4 and 380.5 eV respectively, [40] as shown in Figure 8c, consistent with the complexation manner.…”

Section: Resultssupporting

confidence: 65%

“…[34][35][36] One PA molecule contains six negatively charged phosphate groups, exhibits quite strong complexing ability to a wide range of metal cations, a good choice for extraction of metal ions. PAdoped materials have been successfully applied in several areas such as adsorption of metal cations, [37][38][39][40][41] dyes, [42] and electrochemical detection/activity. [43] Polydopamine (PDA) [44,45] has the merits of mild and environmentally benign synthesis and broad availability for modification on a wide range of substrates, and has been widely applied in a variety of occasions including energy storage, catalysis, biosensors, drug delivery, and environmental remediation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Green and Simple Synthesis of a Nonflammable and Broad‐Spectrum Adsorbent for Uranyl and Other Metal Ions

Zhang,

Li,

Zhao

et al. 2023

ChemistrySelect

View full text Add to dashboard Cite

Adsorption is an effective technology widely used in the removal of radioactive and other heavy metal ions, the adsorbent plays critical role and development of novel adsorbents is being in urgent demand. In this work, phytic acid (PA)‐modified melamine sponge (MS) adsorbent MS@PDA@PA is prepared conveniently in green solvent water. A wide spectrum of metal ions including radioactive uranyl and transition heavy metal ions can be effectively adsorbed by the MS@PDA@PA due to non‐selectivity of phosphoric acid groups in PA. Different factors including pH of aqueous solution, contact time, and initial concentration of ions on the effect of adsorption of the resultant materials are investigated in detail, and the maximum adsorption capacities for U(VI), Pb(II), Cu(II), Cr(III) are 166.7, 168.5, 114.3, and 101.0 mg g−1 respectively at 298 K. It is notable that the MS@PDA@PA is nonflammable due to employment of MS as frame material, and the thermal stability is even improved after incorporation of PA, greatly reduce the risk of the adsorbent in the processes of storage and usage. The green yet simple synthesis and fire resistance of MS@PDA@PA make it a competitive material for practical treatment of wastewater consisting of toxic metal ions.

show abstract

Section: Resultssupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Green and Simple Synthesis of a Nonflammable and Broad‐Spectrum Adsorbent for Uranyl and Other Metal Ions

Zhang,

Li,

Zhao

et al. 2023

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…36,37 The XPS spectrum was further employed to analyze the surface composition and chemical structure of PE-x. As shown in Figure 3c, characteristic peaks of P, C, N, and O elements 38,39 suggest that phytic acid and ethylenediamine were integrated successfully. The surface elemental composition of PE-x is shown on the right side of Figure 3c.…”

Section: Resultsmentioning

confidence: 91%

Novel Phytic Acid-Based Supramolecular Material for Uranium Removal from Highly Acidic Media: Synthesis, Performance, and Mechanistic Insights

Huang

Pan

et al. 2023

ACS EST Water

View full text Add to dashboard Cite

The efficient adsorption and removal of U(VI) from nuclear wastewater is fetching growing interest due to its importance for the ecological environment and human health. In this study, we report a facile ionic self-assembly method to synthesize a phytic acid-based material denoted PE-x using phytic acid and ethylenediamine. PE-x was applied to remove U(VI) from a highly acidic aqueous solution with pH = 1.0. In batch adsorption experiments, PE-x showed fast removal kinetics for U(VI) with an equilibrium time around 10 min, excellent selectivity for An-Ln and U(VI) with a maximum selectivity of 97.8% and 76.2%, and a remarkable maximum adsorption capacity of 689.7 mg/g toward U(VI). Additionally, PE-x exhibited a considerable adsorption capacity of 282.6 mg/g in the fixed bed column test. The adsorption mechanism was investigated by using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The results indicate a unique mechanism based on the reconstruction of the self-assembly framework involving U(VI) building blocks driven by positively charged species exchange. This study provides new insights and strategies for the design of enhanced uranium adsorbents under highly acidic conditions and extends the potential practical application of phytic acid for uranium capture from radioactive wastewater.

show abstract

“…Biomass materials, such as collagen fibers, 34 wools, 35 luffa cylindrical fibers, 36 hemp stalks, 37 and chitosan, 38 exhibit the advantages of low cost and high availability and involve minimal environmental impact; as a result, they are widely applied today for manufacturing various advanced U(VI) adsorbents. 39 Wool fibers are plentiful and sustainable biomass material, 40 which can float on water due to their light density; moreover, they exhibit knitting characteristics, which are convenient for large-scale application in seawater.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Ag-Loaded Amidoxime-Functionalized Wool Fibers via Thiol-ene Click Reaction for Uranium(VI) Adsorption with Good Antibiofouling Properties

Zhao,

Cheng

2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The recovery of uranium from seawater by adsorption is strategically important for the sustainability of nuclear energy. However, marine biofouling reduces the adsorption efficiency in adsorbents of uranium(VI) ions. To develop biomass adsorbents with good adsorption capacity and antibiofouling properties, we propose a strategy to release free thiol groups by cleaving the disulfide bonds in wools and then via thiol-ene click reaction and in situ coprecipitation, preparing Ag-loaded amidoxime-functionalized wool fibers (Ag@Wool-AO) for selective adsorption of U(VI) ions. The prepared adsorbents were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive spectroscopy, and X-ray photoelectron spectroscopy. The adsorption properties, selectivity, antibacterial properties, and reusability of Ag@Wool-AO as an adsorbent of U(VI) ions were also studied. The results showed that while the adsorption process was at 25 °C and pH 6.0 with the initial concentration of uranium ions at 50 mg/L, the adsorption capacity of Ag@Wool-AO can reach 92.49 mg/g. The adsorption process followed the pseudo-second-order kinetic model and Langmuir adsorption isotherm model. Using the Langmuir model, we found the adsorption capacity of Ag@Wool-AO for U(VI) ions to be 172.71 mg/g. Under simulated seawater conditions, the removal rate of the U(VI) ion by Ag@Wool-AO is 33.30%. Furthermore, the loaded Ag nanoparticles imparted good antibiofouling properties to the adsorbent by providing hot electrons for the reduction of U(VI) under the action of photoactivity. The cooperation between the injected hot electrons and the U(VI) binding site directly promotes the remarkable U

show abstract

Electrosorption of uranium (VI) from aqueous solution by phytic acid modified chitosan: An experimental and DFT study

Cited by 63 publications

References 39 publications

Green and Simple Synthesis of a Nonflammable and Broad‐Spectrum Adsorbent for Uranyl and Other Metal Ions

Green and Simple Synthesis of a Nonflammable and Broad‐Spectrum Adsorbent for Uranyl and Other Metal Ions

Novel Phytic Acid-Based Supramolecular Material for Uranium Removal from Highly Acidic Media: Synthesis, Performance, and Mechanistic Insights

Preparation of Ag-Loaded Amidoxime-Functionalized Wool Fibers via Thiol-ene Click Reaction for Uranium(VI) Adsorption with Good Antibiofouling Properties

Contact Info

Product

Resources

About