Fast recovery of lead from hydrochloric acid via a novel silica-supported anion exchange resin for the determination of 210Pb in environmental samples

Chen, Lifeng; Zhang, Jie; He, Xianwen; Liu, Yijie; Wei, Qiuyang; Wang, Xinpeng; Wei, Yuezhou

doi:10.1016/j.cej.2020.125300

Cited by 16 publications

(5 citation statements)

References 49 publications

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“…The inorganic organic composite carrier SiO 2 -P was prepared by an in situ polymerization method [ 35 , 36 ]. The preparatory flow sheet of the SiO 2 -P is illustrated in Figure 2 .…”

Section: Methodsmentioning

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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“…The inorganic organic composite carrier SiO 2 -P was prepared by an in situ polymerization method [ 35 , 36 ]. The preparatory flow sheet of the SiO 2 -P is illustrated in Figure 2 .…”

Section: Methodsmentioning

confidence: 99%

“…The adsorption performance and mechanism of recovery of palladium ion from simulated HLLW were investigated. The inorganic organic composite carrier SiO 2 -P was prepared by an in situ polymerization method [35,36]. The preparatory flow sheet of the SiO 2 -P is illustrated in Figure 2.…”

Section: Preparation Of Sio2-pmentioning

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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“…The silica-based polystyrene (SiPS) was prepared through an in-situ solution polymerization method, where the monomers copolymerized in the silica channel and formed the porous composite. The detailed synthesis procedure of SiPS was introduced in our previous work [32,33]. Next, HDEHP was dissolved in dichloromethane and mixed with SiPS particles.…”

Section: Adsorbent Preparation and Characterizationmentioning

confidence: 99%

“…4(a), HDEHP@SiPS had a regular spherical shape and smooth surface, and the particle size was estimated in the range of 75-150 μm, which was consistent with that of SiO2. The small particle size and regular shape rendered the adsorbent with excellent column compatibility [32,33].…”

Section: Characterizationmentioning

confidence: 99%

“…For comparison, traditional organic resin Na-QP required more than 90 min to reach the adsorption equilibrium. The fast adsorption speed could be attributed to its large specific surface area and small particle size [33,34]. The large specific surface area resulted in the exposure of more active sites, and the small particle size contributed to a short diffusion distance.…”

Section: Batch Experimentsmentioning

confidence: 99%

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Preparation and characterization of a mesoporous silica-based copolymer loaded with bis(2-ethylhexyl) phosphate for the efficient separation of trace radium from natural thorium

He,

Liao,

Tang

et al. 2024

Preprint

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Targeted α-nuclide therapy (TAT) has attracted significant attention in recent years due to its unique advantages in cancer treatment. As one of the most important TAT nuclides, 212Pb is quite rare and strongly depends on the supply of its parent nuclides with an appropriate half-life, such as 228Ra or 224Ra. Therefore, establishing a stable and effective method to obtain these nuclides is critical. To address this issue, a silica-supported copolymer loaded with bis (2-ethylhexyl) phosphate (HDEHP) was prepared, characterized, and investigated for the separation of 228Ra and 224Ra from natural 232Th in the nitric acid media. The experimental results showed that the adsorbent was prepared successfully with 19.5 wt% HDEHP loading, and possessed a small particle size and a porous structure. Compared with traditional cation exchange resin, the adsorbent exhibited ultrahigh selectivity and ultrafast adsorption kinetics towards thorium, with the equilibrium time less than 3 min. The adsorption isotherm was well described by the Langmuir model, and the maximum adsorption amount towards thorium could reach 72.0 mg/g. Thermodynamic investigations suggested that the thorium adsorption was endothermic and spontaneous. On basis of batch experiments, the separation behaviors were further investigated in column modes, and the separation of 228Ra and 224Ra from thorium was finally demonstrated using 226Ra as the tracer nuclide. The chemical recovery rate to 226Ra reached 96.7%, and the decontamination factor to thorium exceeded 105. The spectroscopic assessment suggested that the adsorbed species was mainly the positive Th4+ cation and almost no barium and nitrate ions were involved. The adsorption mechanism was dominated by compounding with oxygen in P-O-H and P=O groups. This work exhibited an excellent material and an efficient method for separating 228Ra and 224Ra from natural thorium, rendering it particularly significant in the future preparation and application of 212Pb.

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Preparation and characterization of a mesoporous silica-based copolymer loaded with bis(2-ethylhexyl) phosphate for the efficient separation of trace radium from natural thorium

He,

Liao,

Tang

et al. 2024

J Radioanal Nucl Chem

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Fast recovery of lead from hydrochloric acid via a novel silica-supported anion exchange resin for the determination of 210Pb in environmental samples

Cited by 16 publications

References 49 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

Preparation and characterization of a mesoporous silica-based copolymer loaded with bis(2-ethylhexyl) phosphate for the efficient separation of trace radium from natural thorium

Preparation and characterization of a mesoporous silica-based copolymer loaded with bis(2-ethylhexyl) phosphate for the efficient separation of trace radium from natural thorium

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