Insights into the interaction of iodide and iodine with Cu(II)-loaded bispicolylamine chelating resin and applications for nuclear waste treatment

Robshaw, Thomas J.; Griffiths, Sion M.; Canner, Adam J.; Bezzina, James P.; Waller, Archibald G.L.; Hammond, Deborah B.; Meurs, Sandra van; Ogden, Mark D.

doi:10.1016/j.cej.2020.124647

Cited by 32 publications

(25 citation statements)

References 59 publications

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“…This said, the literature does broadly show that Agbearing adsorbents are superior in selectivity to Cu, Pb and other equivalents, verses competing ions such as chloride and carbonate [42,48], with reported distribution coefficients at least two orders of magnitude higher [15]. The same is true for adsorption in alkaline conditions, relevant to spent caustic scrub solution [15,20,24] and can be rationalised by considering the K sp values of the relevant metal hydroxides and carbonates (Table 2). Very little work has been carried out at strongly acidic pH, partially because of the invariable loss of metal from the adsorbent surface [13,24], which could cause downstream processing issues, but also because iodine can be driven into the gaseous phase from acidic solutions by sparging [11].…”

Section: Appropriate Choice Of Functionalising Metal and Adsorbent Matrixmentioning

confidence: 90%

“…It must also be considered that many of the aqueous streams, from which iodine removal could be attempted, feature extreme pHs [21]. Even mildly acidic conditions change iodine speciation from predominantly iodide to more hydrophobic species, while a high pH entails high concentrations of hydroxide and possibly carbonate anions [22], which can severely limit the exchange of anions on to the solid phase, due to competition for binding sites [23][24][25].…”

Section: The Challenges Of Aqueous Iodine Adsorption In the Nuclear Industrymentioning

confidence: 99%

“…This is possibly because the iodide anion is rather high in the known series of selectivity for conventional anion-exchange resins and in some conditions, established IX technology is sufficient for its effective removal [29,39]. However, with the remarkable chemical conditions that must be overcome within this remit, the application of HSAB is close to essential [23,24,40]. To the best of our knowledge, this is the first comprehensive review of metallated adsorbents for aqueous iodide immobilisation.…”

Section: Metals For Iodine Capturementioning

confidence: 99%

“…Another method of creating a metallated IX resin is via adsorption by a chelating functional group [31,59]. A bispicolylamine resin has been loaded with Cu 2+ ions, which was stable at pH 2-10 and adsorbed > 160 mg I − g −1 with a column feed of 50 mg L −1 iodide and 10 molar equivalents of nitrate and molybdate ions [24]. However, because of a REDOX reaction between Cu 2+ and I − , the more hydrophobic I 3 − anion was formed in-situ.…”

Section: Ion-exchange Resinsmentioning

confidence: 99%

“…However, because of a REDOX reaction between Cu 2+ and I − , the more hydrophobic I 3 − anion was formed in-situ. This species is known to interact weakly with organic adsorbents by partitioning [24,60]. This is problematic for the stability of final wasteforms (Fig.…”

Section: Ion-exchange Resinsmentioning

confidence: 99%

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Capture of aqueous radioiodine species by metallated adsorbents from wastestreams of the nuclear power industry: a review

et al. 2021

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Iodine-129 poses a significant challenge in the drive towards lowering radionuclide emissions from used nuclear fuel recycling operations. Various techniques are employed for capture of gaseous iodine species, but it is also present, mainly as iodide anions, in problematic residual aqueous wastestreams, which have stimulated research interest in technologies for adsorption and retention of the radioiodine. This removal effort requires specialised adsorbents, which use soft metals to create selectivity in the challenging chemical conditions. A review of the literature, at laboratory scale, reveals a number of organic, inorganic and hybrid adsorbent matrices have been investigated for this purpose. They are functionalised principally by Ag metal, but also Bi, Cu and Pb, using numerous synthetic strategies. The iodide capacity of the adsorbents varies from 13 to 430 mg g−1, with ion-exchange resins and titanates displaying the highest maximum uptakes. Kinetics of adsorption are often slow, requiring several days to reach equilibrium, although some ligated metal ion and metal nanoparticle systems can equilibrate in < 1 h. Ag-loaded materials generally exhibit superior selectivity for iodide verses other common anions, but more consideration is required of how these materials would function successfully in industrial operation; specifically their performance in dynamic column experiments and stability of the bound radioiodine in the conversion to final wasteform and subsequent geological storage. Article highlights Metallated adsorbents for the capture and retention of radioiodine in the nuclear industry are assessed. The strengths and weaknesses of organic, inorganic and hybrid support matrices and loading mechanisms are discussed. Pathways for progression of this technology are proposed. Graphic abstract

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Section: Appropriate Choice Of Functionalising Metal and Adsorbent Matrixmentioning

confidence: 90%

Section: The Challenges Of Aqueous Iodine Adsorption In the Nuclear Industrymentioning

confidence: 99%

Section: Metals For Iodine Capturementioning

confidence: 99%

Section: Ion-exchange Resinsmentioning

confidence: 99%

Section: Ion-exchange Resinsmentioning

confidence: 99%

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Capture of aqueous radioiodine species by metallated adsorbents from wastestreams of the nuclear power industry: a review

et al. 2021

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Synthesis and Catalytic Studies of Thermoresponsive Copper (I) Complex towards Click Reactions

et al. 2023

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Click reaction or copper‐assisted azide–alkyne cycloaddition (CuAAC) reaction can conveniently synthesize desired organic molecules or functionalize biological macromolecules. In many cases, trace amounts of residual copper from the reaction mixture are not trivial to remove when the exhaustive purification step is avoided to fulfill the essential criteria of a click reaction. It is often detrimental, particularly for biochemical applications or when it involves biological macromolecules. Herein, we have reported the synthesis of a new type of copper (I) complex as a smart catalyst for click reaction, which can be separated from the reaction mixture very easily by the slight elevation of temperature, thanks to its thermoresponsive behavior. The click reactions using a thermoresponsive catalyst were first studied in an aqueous medium using various organic molecules containing alkyne and azide functional groups. Later, the strategy was extended to biological macromolecules like collagen.

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Iodide adsorption from aqueous solutions using zirconium-containing anion exchange resin as an oxidizing resin: batch and column studies

Akbari,

Sharifnia

2024

J IRAN CHEM SOC

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Insights into the interaction of iodide and iodine with Cu(II)-loaded bispicolylamine chelating resin and applications for nuclear waste treatment

Cited by 32 publications

References 59 publications

Capture of aqueous radioiodine species by metallated adsorbents from wastestreams of the nuclear power industry: a review

Capture of aqueous radioiodine species by metallated adsorbents from wastestreams of the nuclear power industry: a review

Synthesis and Catalytic Studies of Thermoresponsive Copper (I) Complex towards Click Reactions

Iodide adsorption from aqueous solutions using zirconium-containing anion exchange resin as an oxidizing resin: batch and column studies

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