UO22+-imprinted thermoresponsive hydrogel for accumulation of uranium from seawater

Tang, Liwen; Ren, Shaobo; Zhang, Tingting; Wei, Xin; Li, Mengting; Yin, Xijie; Wei, Suying

doi:10.1016/j.cej.2021.130589

Cited by 38 publications

(11 citation statements)

References 55 publications

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“…Since the adsorption process of Pb(II) exhibits a better fitting to heterogeneous multi-molecular layer adsorption, the Pb(II) on the surface layer is preferentially desorbed during rinsing. Later, the Pb(II) embedded in the inner layer would be gradually desorbed due to multiple factors—e.g., the expansion of polymer chains, the destruction of the interaction between ions and polymer functional groups, and the enlarging of pores [ 35 ]. Therefore, the suitable desorption conditions could be summarized as 5 °C of desorption temperature, 10 min of immersion, and three rinsings.…”

Section: Resultsmentioning

confidence: 99%

Cassava Starch-Based Thermo-Responsive Pb(II)-Imprinted Material: Preparation and Adsorption Performance on Pb(II)

Zhang

et al. 2022

Polymers

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Heavy metal pollution is currently an increasing threat to the ecological environment, and the development of novel absorbents with remarkable adsorption performance and cost-effectiveness are highly desired. In this study, a cassava starch-based Pb(II)-imprinted thermo-responsive hydrogel (CPIT) had been prepared by using cassava starch as the bio-substrate, N-isopropyl acrylamide (NIPAM) as the thermo-responsive monomer, and Pb(II) as the template ions. Later, a variety of modern techniques including FTIR, DSC, SEM, and TGA were employed to comprehensively analyze the characteristic functional groups, thermo-responsibility, morphology, and thermal stability of CPIT. The obtained material exhibited superior performance in adsorption of Pb(II) and its maximum adsorption capacity was high—up to 114.6 mg/g under optimized conditions. Notably, the subsequent desorption (regeneration) process was fairly convenient by simply rinsing with cold deionized water and the highest desorption efficiency could be achieved as 93.8%. More importantly, the adsorption capacity of regenerated CPIT still maintained 88.2% of the value of starting material even after 10 recyclings. In addition, the excellence of CPIT in selective adsorption of Pb(II) should also be highlighted as its superior adsorption ability (97.9 mg/g) over the other seven interfering metal ions.

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Section: Resultsmentioning

confidence: 99%

Cassava Starch-Based Thermo-Responsive Pb(II)-Imprinted Material: Preparation and Adsorption Performance on Pb(II)

Zhang

et al. 2022

Polymers

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“…Alginate/Poloxamer 407 Dental caries treatment [192] Alginate/sodium hyaluronate/ methylcellulose composite Arthritis treatment [193] Alginate/PNIPAAm Recovery of Li from seawater [187] Alginate/PNIPAAm/ε-polylysine Recovery of uranium from seawater [188] Alginate/gelatin/ZnO Scaffold for cartilage tissue regeneration [194] Chitosan Injectable, controllable degradation, and drug delivery [195] Chitosan/alginate Injectable hydrogels for ocular disease treatments [196] Hyaluronic acid/dextran PNIPAAm, PEG, PLGA Chitosan/PNIPAAm Delivery of therapeutic proteins for cardiac protection against myocardial infarction [197] Methylcellulose Oral dosage drug [198,199] Prevention of post-operatory adhesion Hydroxypropyl cellulose/ Konjac glucomannan biomass Super hygroscopic collector of water from atmospheric moisture [200] Methacrylate gelatin Adhesion, wound repair [201] Gelatin/silk Nerve guidance conducts for nerve regeneration [202] Cellulose/Pluronic F127 Injectable drug delivery [203] PNIPAAm Solar water evaporation [164] PNIPAAm-poly(acrylic acid) (PAA) copolymers Smart window for building energy efficiency [204,205] Artificial breathing actuator PEG-PCL copolymers Injectable gel to deliver therapeutic proteins for ocular diseases [68,206] Drug delivery, graft Poly(3-hydroxybutyrate) (PHB) Tissue engineering [207] Hydrogel-Ag NPs Antibacterial hydrogel for wound healing [115,208,209] Antibacterial coating…”

Section: Hydrogel Nature Main Properties And/or Applications Referencesmentioning

confidence: 99%

“…Very recently, Park and Lee [ 187 ] reported the purification of water contaminated with Li + , promoted by the hydrophilic–hydrophobic transition of PNIPAAm/ALG composite doped with Al 3+ ions (i.e., playing with its cloud temperature). Tang et al [ 188 ] were also able to recover UO 2 2+ from seawater by employing a sodium ALG/PNIPAAm thermoresponsive hydrogel system. Therefore, this TSH application is coming into force.…”

Section: Summary and Perspectivementioning

confidence: 99%

Recent Advances in Poly(N‐isopropylacrylamide) Hydrogels and Derivatives as Promising Materials for Biomedical and Engineering Emerging Applications

et al. 2023

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Temperature‐sensitive (thermosensitive) hydrogels, which are part of the family of stimulus‐sensitive hydrogels, consist of water‐filled polymer networks that display a temperature‐dependent degree of swelling. Thermosensitive hydrogels, which can undergo phase transition or swell/de‐swell as temperature changes, have great potential in various technological and biomedical purposes for a number of reasons: their temperature response is reversible, hydrogels are stable and easy to prepare, they can be biocompatible and also be suitably combined with other organic and inorganic materials, resulting in new materials with outstanding properties. Among thermosensitive hydrogels poly(N‐isopropylacrylamide) (PNIPAAm) is the most extensively studied because it brings together the best properties of these materials. Consequently, in the past few years, a wide number of applications and new chemical processes to prepare PNIPAAm and their derivatives are being proposed. The objective of this review is to summarize the fundamentals of thermosensitive hydrogels and recent advances in preparation and both technological and biomedical applications of thermosensitive hydrogel, with a special focus on PNIPAAm and their derivatives. Special attention has been given to the discussion of challenges and future research perspectives based on new horizons not yet considered.

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“…More and more materials are used for uranium extraction from seawater, including polymers, inorganic materials, , nanomaterials, − and hydrogels. − Because of their low cost, simple operation, high efficiency, and easy separation, the polymer-based adsorbents are widely studied, including polypropylene (PP), − polyethylene (PE), ,, poly(vinylidene fluoride) (PVDF), and polyacrylonitrile (PAN). ,,, Polyolefin thin membranes have recently become the focus of research because their good mechanical properties are beneficial to have a long service life. Functional groups can be introduced on the surface of the material by two-step grafting .…”

Section: Introductionmentioning

confidence: 99%

Advanced Amidoximated Polyethylene Nanofibrous Membranes for Practical Uranium Extraction from Seawater

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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As the key material of the adsorption method used for practical uranium extraction from seawater, the adsorbent should have a high uranium adsorption capacity and long service life. Polyethylene nanofibrous membranes (PENFMs) using a one-step grafting strategy to prepare scalable membrane adsorbents are reported with supreme uranium uptake capacity and long service life. A series of amidoximated polyethylene nanofibrous membrane (called amidoximated membrane or AM) adsorbent materials with different degrees of grafting (DGs) are modified by one-step radiation-induced graft polymerization (RIGP) of acrylonitrile (AN) and acrylic acid (AA) and an amidoximation reaction. The AM adsorbents prepared from the PENFM show outstanding hydrophilicity, good adsorption capacity, and excellent affinity for uranium. The highest uranium uptake capacity of AM adsorbents is 115.32 mg/g in simulated seawater for 24 h and 6.03 mg/g in natural seawater for 10 weeks. The AM adsorbents are reusable for more than 10 cycles of continuous adsorption–desorption–regeneration tests, showing the long service life. In addition, the AM adsorbent adsorption results in natural seawater indicate that only prolonging time to pursue high adsorption capacity is not conducive to the acquisition of benefits. The AM adsorbents have broad potential application in the industrialization of uranium extraction from seawater by choosing the best adsorption efficiency to achieve high adsorption amount.

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UO22+-imprinted thermoresponsive hydrogel for accumulation of uranium from seawater

Cited by 38 publications

References 55 publications

Cassava Starch-Based Thermo-Responsive Pb(II)-Imprinted Material: Preparation and Adsorption Performance on Pb(II)

Cassava Starch-Based Thermo-Responsive Pb(II)-Imprinted Material: Preparation and Adsorption Performance on Pb(II)

Recent Advances in Poly(N‐isopropylacrylamide) Hydrogels and Derivatives as Promising Materials for Biomedical and Engineering Emerging Applications

Advanced Amidoximated Polyethylene Nanofibrous Membranes for Practical Uranium Extraction from Seawater

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