Selective removal of 90Sr and 60Co from aqueous solution using N-aza-crown ether functional poly(NIPAM) hydrogels

Deli, Dario; Law, Kathleen; Liu, Zuguang; Crouch, David J.; Livens, Francis R.; Yeates, Stephen G.

doi:10.1016/j.reactfunctpolym.2012.03.013

Cited by 11 publications

(6 citation statements)

References 17 publications

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“…It would be easier (but not always desirable) to remove ions non-selectively. This can be done in a bulk liquid using, for example, plutonium uranium redox extraction (PUREX), 105 hydrogels, 33,106 or algae. 107,108 However, the typically small concentrations of contaminants make these approaches very inefficient.…”

Section: Discussionmentioning

confidence: 99%

“…29,30 Understanding the pairing and solvation properties of these ions hopefully contributes to finding a process to discriminate between them. [31][32][33] One of the purposes of this work is to compare hydration properties and ion pairing of conventional and radioactive ions with each other. We attempt to do this by discussing and unifying results for various structural and dynamic quantities of five different cations and three ion concentrations.…”

Section: Introductionmentioning

confidence: 99%

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Structure and transport of aqueous electrolytes: From simple halides to radionuclide ions

Hartkamp

Coasne

2014

The Journal of Chemical Physics

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Molecular simulations are used to compare the structure and dynamics of conventional and radioactive aqueous electrolytes: chloride solutions with sodium, potassium, cesium, calcium, and strontium. The study of Cs(+) and Sr(2+) is important because these radioactive ions can be extremely harmful and are often confused by living organisms for K(+) and Ca(2+), respectively. Na(+), Ca(2+), and Sr(2+) are strongly bonded to their hydration shell because of their large charge density. We find that the water molecules in the first hydration shell around Na(+) form hydrogen bonds between each other, whereas molecules in the first hydration shell around Ca(2+) and Sr(2+) predominantly form hydrogen bonds with water molecules in the second shell. In contrast to these three ions, K(+) and Cs(+) have low charge densities so that they are weakly bonded to their hydration shell. Overall, the structural differences between Ca(2+) and Sr(2+) are small, but the difference between their coordination numbers relative to their surface areas could potentially be used to separate these ions. Moreover, the different decays of the velocity-autocorrelation functions corresponding to these ions indicates that the difference in mass could be used to separate these cations. In this work, we also propose a new definition of the pairing time that is easy to calculate and of physical significance regardless of the problem at hand.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structure and transport of aqueous electrolytes: From simple halides to radionuclide ions

Hartkamp

Coasne

2014

The Journal of Chemical Physics

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“…Nanomaterials have also shown high performance for the removal of contaminants because of their high surface area, large pore volume, high pore sizes and absence of internal diffusion resistance 38 39 . Therefore, when nanomaterials are immobilized with functional organic compounds, it creates a new powerful class of hybrid nanomaterials that can be used for the purpose of the fast and potential remediation process 39 40 41 . To improve the rate and selectivity of Cs adsorption at extremely low concentrations onto adsorbents, adsorbents with specific functional groups containing organic ligand are preferable with extreme selectivity based on the inorganic material supported hybrid adsorbent 27 .…”

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confidence: 99%

A Reliable Hybrid Adsorbent for Efficient Radioactive Cesium Accumulation from Contaminated Wastewater

Awual

Yaita

Miyazaki

et al. 2016

Sci Rep

190

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Cesium (Cs) removal from nuclear liquid wastewater has become an emerging issue for safeguarding public health after the accident at the Fukushima Daiichi Nuclear Power Plant. A novel macrocyclic ligand of o-benzo-p-xylyl-22-crown-6-ether (OBPX22C6) was developed and successfully immobilized onto mesoporous silica for the preparation of hybrid adsorbent. The benzene ring π electron is the part of crown ether of OBPX22C6 for easy orientation of the macrocyclic compound for making the π electron donation with Cs complexation. The potential and feasibility of the hybrid adsorbent as being Cs selective was evaluated in terms of sensitivity, selectivity and reusability. The results clarified that the Cs removal process was rapid and reached saturation within a short time. Considering the effect of competitive ions, sodium (Na) did not markedly affect the Cs adsorption whereas potassium (K) was slightly affected due to the similar ionic radii. However, the oxygen in long ethylene glycol chain in OBPX22C6 was expected to show strong coordination, including Cs-π interaction with Cs even in the presence of the high amount of K and Na. Due to its high selectivity and reusability, significant volume reduction is expected as this promising hybrid adsorbent is used for Cs removal in Fukushima wastewater.

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“…25,26 Hydrogels 22,27 having porous crosslinked polymeric structures and high surface areas are also known to adsorb heavy metal ions and radionuclides. [28][29][30][31][32][33] It has been shown, for example, that poly(acrylic acid-co-acrylamide) hydrogels are able to selectively sequester Cu 2+ in the presence of other metal ions from aqueous streams. 34 Numerous studies have also shown that the incorporation of 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) into a hydrogel facilitates metal ion binding, as illustrated by the use of a poly(2-acrylamido-2-methyl-1-propanesulfonic acid-covinyl imidazole) hydrogel for the removal of Cu 2+ and Fe 2+ from aqueous waste streams.…”

Section: Introductionmentioning

confidence: 99%

“…Hydrogels 22,27 having porous crosslinked polymeric structures and high surface areas are also known to adsorb heavy metal ions and radionuclides 28–33 . It has been shown, for example, that poly(acrylic acid‐ co ‐acrylamide) hydrogels are able to selectively sequester Cu 2+ in the presence of other metal ions from aqueous streams 34 .…”

Section: Introductionmentioning

confidence: 99%

Heavy metal sensors and sequestrating agents based on polyaromatic copolymers and hydrogels

Alwattar

Haddad

Moore

et al. 2020

Polymer International

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A series of readily available, amphiphilic pyrene-and perylene-containing fluorescent materials, derived from the copolymerisation of 2-acrylamido-2-methyl-1-propanesulfonic acid with acrylate esters, can be used to detect heavy metal ions in the micromolar concentration range in aqueous solutions. The incorporation of these amphiphilic copolymers into semiinterpenetrating hydrogels also resulted in the irreversible removal of divalent Co 2+ , Ni 2+ , Cu 2+ and Pb 2+ ions from aqueous solutions at neutral pH.

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Selective removal of 90Sr and 60Co from aqueous solution using N-aza-crown ether functional poly(NIPAM) hydrogels

Cited by 11 publications

References 17 publications

Structure and transport of aqueous electrolytes: From simple halides to radionuclide ions

Structure and transport of aqueous electrolytes: From simple halides to radionuclide ions

A Reliable Hybrid Adsorbent for Efficient Radioactive Cesium Accumulation from Contaminated Wastewater

Heavy metal sensors and sequestrating agents based on polyaromatic copolymers and hydrogels

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