The removal of uranium (VI) from aqueous solution by the anaerobically digested sewage sludge with hydrothermal pretreatment

Lu, Yang; Jin, Jie; Wang, Yichu; An, Weiqi; Zhao, Yunao; Cui, Chao; Han, Lanfang; Wang, Xiangke

doi:10.1016/j.chemosphere.2021.132644

Cited by 10 publications

(3 citation statements)

References 44 publications

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“…For N 1s (Figure e), no additional peaks were seen in the N 1s spectrum of CaCO 3 @aCS/PA after adsorption and the original peaks only moved slightly in a positive direction, suggesting that nitrogen-containing groups participated in the uranium adsorption through complexation. , The high-resolution O 1s of CaCO 3 @aCS/PA was split into three peaks (Figure f), corresponding to −OH (532.6 eV), PO/CO (530.7 eV), and P–O/C–O (530.7 eV). After uranium adsorption, the relative content of −OH decreased by 4.8% and the binding energy was observed at about 531.4 eV (OUO), indicating that −OH, CO 3 2– and PO 4 3– contributed to the uranium adsorption process and uranium was successfully captured by these active sites, leading to an increase in O 2– oxide. , …”

Section: Resultsmentioning

confidence: 99%

“…After uranium adsorption, the relative content of −OH decreased by 4.8% and the binding energy was observed at about 531.4 eV (O� U�O), indicating that −OH, CO 3 2− and PO 4 3− contributed to the uranium adsorption process and uranium was successfully captured by these active sites, leading to an increase in O 2− oxide. 65,66 Furthermore, negatively charged CaCO 3 @aCS/PA (Figure S7) could respond strongly to positively charged uranium at pH = 4. Following the proximity of uranium, the various active sites on CaCO 3 @aCS/PA (CO 3 (2) (3)…”

Section: Comparisonsmentioning

confidence: 99%

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Efficient Separation of Uranium(VI) by CaCO₃-Doped Chitosan with PO₄^3– Modification: Adsorption Behaviors and Mechanism Study

Liao,

Ding,

Shi

et al. 2024

ACS Appl. Polym. Mater.

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The application of chitosan-based materials for the separation of uranium from wastewater was limited due to the lack of active sites. In this work, a chitosan-based composite (CaCO3@aCS/PA) was effectively created by modifying chitosan with CaCO3 and phytic acid to enhance the adsorption performance of chitosan materials. CaCO3@aCS/PA showed no significant changes and no Ca2+ was detected in the solution after stirring for 10 h in a solution with pH > 3, indicating good stability of CaCO3@aCS/PA, which was beneficial for use in adsorption. Moreover, the adsorption capacity and adsorption percentage of CaCO3@aCS/PA for uranium reached 842.0 mg/g (298 K, pH = 4) and 95.4% (C 0 = 10 mg/L, pH = 4) and the adsorption equilibrium time was significantly shortened, indicating that the modification with CaCO3 and phytic acid enhanced the adsorption ability of chitosan for uranium, which was related to the synergistic effect of various active sites (CO3 2–, PO4 3–, −OH, and –NH2) on CaCO3@aCS/PA for uranium adsorption.

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Section: Resultsmentioning

confidence: 99%

Section: Comparisonsmentioning

confidence: 99%

Efficient Separation of Uranium(VI) by CaCO₃-Doped Chitosan with PO₄^3– Modification: Adsorption Behaviors and Mechanism Study

Liao,

Ding,

Shi

et al. 2024

ACS Appl. Polym. Mater.

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“…The above-mentioned strategies showed high Au recovery efficiency, while they suffered from low feasibility such as complex process, high toxicity, environmental hazard, and high time and cost. The adsorption method is considered to be more suitable for Au recovery compared with the above-mentioned techniques due to the advantages of low cost, simplicity of operation, low energy consumption, good scalability, and green processability. − The reported adsorbents, such as chitosan resin, nanomaterials, activated carbon, and minerals, show good adsorption properties for Au ions. Torrinha et al recovered Au(III) with tannin resin prepared from inexpensive pine bark from solutions, and the adsorption capacity of Au was 343 mg/g .…”

Section: Introductionmentioning

confidence: 99%

Cr-Based MOF for Efficient Adsorption of Au at Low Concentrations

Tang

2022

Langmuir

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The efficient enrichment and selection of Au are crucial for gold recovery. The adsorption technology is considered to have potential due to the advantages of operation simplicity and green processability. Nevertheless, the poor Au selectivity at low concentrations in complex solutions limits the further application of the adsorption technology. In this work, a novel Cr-based MOF adsorbent was successfully synthesized using 1,2,4-triazole and 4-aminobenzoic acid as ligands. Benefitting from the surface positive charge and extensive chelation and reduction sites, the novel Cr-based MOF exhibited a total adsorption capacity of up to 357 mg/g and excellent adsorption selectivity toward Au(III) in the complex metal mixed solutions, such as simulated sewage ash waste liquid and actual e-waste leachate. Furthermore, the adsorption kinetics, isotherms, and thermodynamics were discussed in depth for investigating the adsorption mechanisms of the MOF. The PXRD and XPS analyses reveal that the adsorption process involves complexation, redox, and electrostatic interactions. We believe that this study of novel Cr-based MOF adsorbents for efficient Au adsorption is meaningful for further application in the gold recovery technology from e-waste.

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Removal and recovery of uranium (VI) from aqueous solutions by residual sludge and its biochars

Zou

Liu

et al. 2022

Environ Sci Pollut Res

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The removal of uranium (VI) from aqueous solution by the anaerobically digested sewage sludge with hydrothermal pretreatment

Cited by 10 publications

References 44 publications

Efficient Separation of Uranium(VI) by CaCO₃-Doped Chitosan with PO₄^3– Modification: Adsorption Behaviors and Mechanism Study

Efficient Separation of Uranium(VI) by CaCO₃-Doped Chitosan with PO₄^3– Modification: Adsorption Behaviors and Mechanism Study

Cr-Based MOF for Efficient Adsorption of Au at Low Concentrations

Removal and recovery of uranium (VI) from aqueous solutions by residual sludge and its biochars

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The removal of uranium (VI) from aqueous solution by the anaerobically digested sewage sludge with hydrothermal pretreatment

Cited by 10 publications

References 44 publications

Efficient Separation of Uranium(VI) by CaCO3-Doped Chitosan with PO43– Modification: Adsorption Behaviors and Mechanism Study

Efficient Separation of Uranium(VI) by CaCO3-Doped Chitosan with PO43– Modification: Adsorption Behaviors and Mechanism Study

Cr-Based MOF for Efficient Adsorption of Au at Low Concentrations

Removal and recovery of uranium (VI) from aqueous solutions by residual sludge and its biochars

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Efficient Separation of Uranium(VI) by CaCO₃-Doped Chitosan with PO₄^3– Modification: Adsorption Behaviors and Mechanism Study

Efficient Separation of Uranium(VI) by CaCO₃-Doped Chitosan with PO₄^3– Modification: Adsorption Behaviors and Mechanism Study