Ultra-High Performance of Hyper-Crosslinked Phosphate-Based Polymer for Uranium and Rare Earth Element Adsorption in Aqueous Solution

Di, Tuo; Tan, Donggui; Qi, Yu; Lin, Jiawei; Zhu, Tingting; Li, Tiesheng; Li, Lei

doi:10.1021/acs.langmuir.9b02459

Cited by 54 publications

(15 citation statements)

References 79 publications

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“…The removal rate of Tb(III) by spores showed a more obvious change, increasing rapidly with the increase in pH. It is likely that, with the increase in the pH value, functional groups such as phosphates on the spore surface are deprotonated, cations are reduced, and negative charges are increased; meanwhile, rare earth ions still exist in the form of positive electricity, enhancing the electrostatic interaction and complexation between spores and rare earth ions, and increasing the removal rate of Tb(III) [26,27]. When the pH was 7.5, the percentage of Tb(III) removed by the spores reached equilibrium.…”

Section: Effects Of Adsorption Conditions On Tb(iii) Adsorptionmentioning

confidence: 99%

Bioadsorption of Terbium(III) by Spores of Bacillus subtilis

et al. 2022

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Wastewater containing low concentrations of rare earth ions not only constitutes a waste of rare earth resources but also threatens the surrounding environment. It is therefore necessary to develop environmentally friendly methods of recovering rare earth ions. The spores produced by Bacillus are resistant to extreme environments and are effective in the bioadsorption of rare earth ions, but their adsorption behaviors and mechanisms are not well understood. In this study, the cells and spores of Bacillus subtilis PS533 and PS4150 were used as biosorbents, and their adsorption of terbium ions was compared under different conditions. The adsorption characteristics of the spores were investigated, as were the possible mechanisms of interaction between the spores and rare earth ions. The results showed that the PS4150 spores had the best adsorption effect on Tb(III), with the removal percentage reaching 95.2%. Based on a computational simulation, SEM observation, XRD, XPS, and FTIR analyses, it was suggested that the adsorption of Tb(III) by the spores conforms to the pseudo−second−order kinetics and the Langmuir adsorption isotherm model. This indicates that the adsorption process mainly consists of chemical adsorption, and that groups such as amino, hydroxyl, methyl, and phosphate, which are found on the surface of the spores, are involved in the bioadsorption process. All of these findings suggest that Bacillus subtilis spores can be used as a potential biosorbent for the recovery of rare earth ions from wastewater.

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Section: Effects Of Adsorption Conditions On Tb(iii) Adsorptionmentioning

confidence: 99%

Bioadsorption of Terbium(III) by Spores of Bacillus subtilis

et al. 2022

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“…Hyper-cross-linked porous polymers (HCPs) − are POPs that have been studied in various research areas such as gas adsorption, water treatment, and organic catalysts. They provide a good choice for studying the effect of heteroatoms in the iodine capture process because such materials can be synthesized by a simple knitting method.…”

Section: Introductionmentioning

confidence: 99%

Heteroatom Engineering of Hyper-Cross-Linked Polymers for Iodine Capture

Zhang

Cheng

et al. 2020

ACS Appl. Polym. Mater.

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Great advances have been made in the development of porous materials for efficient iodine capture. Among them, introducing high-affinity binding sites (such as heteroatoms) to improve iodine uptake is a promising strategy. However, systematic research on the heteroatom effect for iodine capture, which may be helpful in clarifying the adsorption process and designing materials with excellent performance, has been rarely reported. In this study, seven hyper-cross-linked porous polymers (HCPs) containing boron, nitrogen, and sulfur atoms, individually or in combination, were synthesized. Based on the experimental evidence and computational simulations, it can be concluded that surface area and pore accessibility are important factors for improving iodine capture capacities and that doping heteroatoms can influence the affinity between HCPs and iodine and then influence the pore accessibility of the materials.

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“…2−4 Previous studies have shown that the discharge of uranium and its compounds into the water environment causes immense damage to the ecological environment. 5,6 Moreover, if uranium enters the body, it deposits into the lungs and travels through the bloodstream to the kidneys. This causes irreversible damage to the human body and kidneys within a short period and even causes death.…”

Section: ■ Introductionmentioning

confidence: 99%

Study on Uranium Adsorption Property of Carbon Nanotubes Prepared by Molten Salt Electrolysis

Liu

Ma³

et al. 2022

ACS Sustainable Chem. Eng.

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Molten salt electrochemistry to prepare nanocarbon materials by converting CO 2 has attracted much attention.In the present study, carbon nanotubes containing the O element were prepared by converting CO 2 in molten salt. The effects of pH, contact time, and reaction temperature on U(VI) adsorption on the adsorbent were studied. The thermodynamic fitting curve and fitting parameters show that uranyl ions were uniformly adsorbed on the surface of carbon nanotubes as a single layer. The adsorption capacity at 298 K was 150.00 mg g −1 . The selectivity of uranium adsorbents was studied by ion competition experiments. EDS and XPS demonstrate that uranyl ions are adsorbed by the carbon nanotubes, and (UO 2 ) 4 O(OH) 6 is confirmed in the carbon nanotubes after adsorption in the FT-IR, XRD, and XPS analyses. The materials prepared by the molten salt electrochemical method exhibited good application prospects for uranium adsorption.

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Ultra-High Performance of Hyper-Crosslinked Phosphate-Based Polymer for Uranium and Rare Earth Element Adsorption in Aqueous Solution

Cited by 54 publications

References 79 publications

Bioadsorption of Terbium(III) by Spores of Bacillus subtilis

Bioadsorption of Terbium(III) by Spores of Bacillus subtilis

Heteroatom Engineering of Hyper-Cross-Linked Polymers for Iodine Capture

Study on Uranium Adsorption Property of Carbon Nanotubes Prepared by Molten Salt Electrolysis

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