A new hydrothermal cross-linking ion-imprinted chitosan for high-efficiency uranium removal

Zhong, Xiaofeng; Sun, Yanbing; Zhang, Zhibin; Dai, Ying; Wang, Youqun; Hua, Rong; Cao, Xiaohong; Liu, Yuhui

doi:10.1007/s10967-019-06794-1

Cited by 17 publications

(8 citation statements)

References 50 publications

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“…The 2D nanotraps can provide more contact between the adsorbate and adsorbent. 29 ]. 30 The ITDCN exhibited 100% uranium uptake even at a fairly low sorbent content of 0.05 mg/mL, indicating that the ITDCN possessed a high binding capacity and affinity for uranium (Figure 4C).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Two-Dimensional Imprinting Strategy to Create Specific Nanotrap for Selective Uranium Adsorption with Ultrahigh Capacity

Zhou

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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Uranium extraction is highly challenging because of low uranium concentration, high salinity, and a large number of competing ions in different environments. The template strategy is developed to address the defect of poor selectivity, but the adsorption capacity is limited by cavity blocking during the preparation of materials. Herein, a twodimensional (2D) imprinting strategy is adopted to design 2D imprinted networks with specific nanotraps for effective uranium capture. The imprinted networks are established through the condensation polymerization of uranyl complexes, which are formed by aromatic building units coordinating with uranyl ions on the equatorial plane. Different from traditional imprinting materials that contain many invalid cavities (buried cavities or unreleased cavities), the as-prepared adsorbents possess tailored 2D nanotraps, which are open and specific to uranyl. Thus, the optimized networks not only show excellent selectivity for uranium (K d = 964,500 mL/g in multi-ion solution) and slight disturbance of high salinity but also possess an ultrahigh adsorption capacity of 1365.7 mg/g. In addition, this adsorbent shows a high extraction efficiency for uranium under a wide range of pH conditions and exhibits good regeneration performance. This work proposes a pioneering strategy of 2D imprinting networks to capture uranium specifically with high capacity and can be applied to material design in many other fields.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Two-Dimensional Imprinting Strategy to Create Specific Nanotrap for Selective Uranium Adsorption with Ultrahigh Capacity

Zhou

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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“…The uranyl ion template was used for the preparation, whereas the polymer was coated on a carbon paste electrode (CPE) (Figure 5). In a recent study, Zhong et al [106] used a simple method of preparing the U-IIPs by using hydrothermal crosslinking of chitosan in the presence of uranyl ion as a template. The adsorption performance and other details of the materials are provided in Table 1.…”

Section: Uraniummentioning

confidence: 99%

Ion-Imprinted Polymers: Synthesis, Characterization, and Adsorption of Radionuclides

et al. 2021

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Growing concern over the hazardous effect of radionuclides on the environment is driving research on mitigation and deposition strategies for radioactive waste management. Currently, there are many techniques used for radionuclides separation from the environment such as ion exchange, solvent extraction, chemical precipitation and adsorption. Adsorbents are the leading area of research and many useful materials are being discovered in this category of radionuclide ion separation. The adsorption technologies lack the ability of selective removal of metal ions from solution. This drawback is eliminated by the use of ion-imprinted polymers, these materials having targeted binding sites for specific ions in the media. In this review article, we present recently published literature about the use of ion-imprinted polymers for the adsorption of 10 important hazardous radionuclides—U, Th, Cs, Sr, Ce, Tc, La, Cr, Ni, Co—found in the nuclear fuel cycle.

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“…Chitosan is considered as a functional biomaterial with greater application potential than cellulose, and it is the product of natural polysaccharide chitin with the removal of some acetyl groups [ 21 ]. Chitosan has a variety of biological qualities, such as biodegradability, biocompatibility, bacteriostasis, and anti-cancer, lipid-lowering and immunity-enhancing qualities [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

The Separation of Chlorobenzene Compounds from Environmental Water Using a Magnetic Molecularly Imprinted Chitosan Membrane

Wang

Zhu

et al. 2022

Polymers

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In this work, a magnetic molecularly imprinted chitosan membrane (MMICM) was synthesized for the extraction of chlorobenzene compounds in environmental water using the membrane separation method. The optimal extraction amount for chlorobenzene (9.64 mg·L−1) was found to be a 1:2 solid to liquid ratio, with a 20 min extraction time and 35 °C extraction temperature. This method proved to be successfully applied for the separation and trace quantification of chlorobenzene compounds in environmental water, with the limit of detection (LOD) (0.0016–0.057 ng·L−1), limit of quantification (LOQ) (0.0026–0.098 ng·L−1), and the recoveries ranging (89.02–106.97%).

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A new hydrothermal cross-linking ion-imprinted chitosan for high-efficiency uranium removal

Cited by 17 publications

References 50 publications

Two-Dimensional Imprinting Strategy to Create Specific Nanotrap for Selective Uranium Adsorption with Ultrahigh Capacity

Two-Dimensional Imprinting Strategy to Create Specific Nanotrap for Selective Uranium Adsorption with Ultrahigh Capacity

Ion-Imprinted Polymers: Synthesis, Characterization, and Adsorption of Radionuclides

The Separation of Chlorobenzene Compounds from Environmental Water Using a Magnetic Molecularly Imprinted Chitosan Membrane

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