Preparation of a novel silica-based N-donor ligand functional adsorbent for efficient separation of palladium from high level liquid waste

Liu, Hefang; Ning, Shunyan; Li, Zengyuan; Zhang, Shichang; Chen, Lifeng; Yin, Xiangbiao; Fujita, Toyohisa; Wei, Yuezhou

doi:10.1016/j.seppur.2022.121373

Cited by 29 publications

(3 citation statements)

References 47 publications

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“…In addition, solvent extraction has high requirements for subsequent treatment and economic investment. Due to these drawbacks, some alternative separation methods have been developed [ 24 , 25 , 26 , 27 , 28 ]. The chemical adsorption method [ 25 , 28 , 29 ] is widely used due to its high efficiency and low cost, especially for recovery metals at low concentrations.…”

Section: Introductionmentioning

confidence: 99%

“…Due to these drawbacks, some alternative separation methods have been developed [ 24 , 25 , 26 , 27 , 28 ]. The chemical adsorption method [ 25 , 28 , 29 ] is widely used due to its high efficiency and low cost, especially for recovery metals at low concentrations. At present, the adsorbents mainly include inorganic material adsorbents, nanomaterial adsorbents, ion exchange resin adsorbents, and biomaterial adsorbents.…”

Section: Introductionmentioning

confidence: 99%

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Efficient and Selective Removal of Palladium from Simulated High-Level Liquid Waste Using a Silica-Based Adsorbent NTAamide(C8)/SiO2-P

Shi,

Wang,

Wang

et al. 2024

Nanomaterials

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In order to realize the effective separation of palladium from high-level liquid waste (HLLW), a ligand-supported adsorbent (NTAamide(C8)/SiO2-P) was prepared by the impregnation method in a vacuum. The SiO2-P carrier was synthesized by in situ polymerization of divinylbenzene and styrene monomers on a macroporous silica skeleton. The NTAamide(C8)/SiO2-P adsorbent was fabricated by impregnating an NTAamide(C8) ligand into the pore of a SiO2-P carrier under a vacuum condition. The adsorption performance of NTAamide(C8)/SiO2-P in nitric acid medium has been systematically studied. In a solution of 0.2 M HNO3, the distribution coefficient of Pd on NTAamide(C8)/SiO2-P was 1848 mL/g with an adsorption percentage of 90.24%. With the concentration of nitric acid increasing, the adsorption capacity of NTAamide(C8)/SiO2-P decreases. Compared to the other 10 potential interfering ions in fission products, NTAamide(C8)/SiO2-P exhibited excellent adsorption selectivity for Pd(II). The separation factor (SFPd/other metals > 77.8) is significantly higher than that of similar materials. The interference of NaNO3 had a negligible effect on the adsorption performance of NTAamide(C8)/SiO2-P, which maintained above 90%. The adsorption kinetics of Pd(II) adsorption on NTAamide(C8)/SiO2-P fits well with the pseudo-second order model. The Sips model is more suitable than the Langmuir and Freundlich model for describing the adsorption behavior. Thermodynamic analysis showed that the adsorption of Pd(II) on NTAamide(C8)/SiO2-P was a spontaneous, endothermic, and rapid process. NTAamide(C8)/SiO2-P also demonstrated good reusability and economic feasibility.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient and Selective Removal of Palladium from Simulated High-Level Liquid Waste Using a Silica-Based Adsorbent NTAamide(C8)/SiO2-P

Shi,

Wang,

Wang

et al. 2024

Nanomaterials

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“…Liu et al 2022). Meanwhile, the Cl − in acidic solution could compete with [PtCl 6 ] 2− , which reduced the electrostatic attraction between [PtCl 6 ] 2− and ML/ACPG sponge.…”

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confidence: 99%

Functionalization of melamine sponge for the efficient recovery of Pt(IV) from acid leachates

Zheng

Yang

et al. 2023

Environ Sci Pollut Res

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The recovery of platinum from industrial waste is of critical importance. Usually, the recovery method is to dissolve the solid waste with acid to form a solution where platinum mainly exists in the form of Pt(IV). Therefor, it is urgen to e ciently and selectively adsorb Pt(IV) ions from acid leachates. In this study, a highly e cient adsorbent was developed by grafting of carboxyl and amine groups onto melamine sponge with alginate-Ca and polyethylenimine-glutaraldehyde (ML/ACPG). Combination of SEM, FTIR and XPS showed that the ML/ACPG sponge had a tree structure and the amino, carboxyl and hydroxyl groups were successfully introduced. Maximum adsorption capacity of ML/ACPG sponge reached up to 101.1 mg/L at pH of 1 (optimum initial pH value). The Pt(IV) ions were readily desorbed (within 60-80 min) using 0.1 M HCl + 0.025 M thiourea solution. Desorption e ciency remained higher than 83.3% while adsorption capacity decreased by less than 6.0% after 5 cycles operation. The ML/ACPG sponge was stable in 3 M of HNO3, NaCl after shaking for 72 h at 300 rpm with mass loss less than 2.5%. The mechanism of Pt(IV) adsorption onto ML/ACPG sponge mainly involved coordination by electrostatic attraction and carboxyl groups by protonated amine groups. The above results con rmed that the ML/ACPG sponge has a good practical application potential for Pt(IV) recovery from acid leachates.

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Synthesis of polyacrolein organic gel and its adsorption properties on acid fuchsin

et al. 2022

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Preparation of a novel silica-based N-donor ligand functional adsorbent for efficient separation of palladium from high level liquid waste

Cited by 29 publications

References 47 publications

Efficient and Selective Removal of Palladium from Simulated High-Level Liquid Waste Using a Silica-Based Adsorbent NTAamide(C8)/SiO2-P

Efficient and Selective Removal of Palladium from Simulated High-Level Liquid Waste Using a Silica-Based Adsorbent NTAamide(C8)/SiO2-P

Functionalization of melamine sponge for the efficient recovery of Pt(IV) from acid leachates

Synthesis of polyacrolein organic gel and its adsorption properties on acid fuchsin

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