Cation immobilization in pyrolyzed simulated spent ion exchange resins

Luca, Vittorio; Bianchi, Hugo L.; Manzini, A. C.

doi:10.1016/j.jnucmat.2012.01.004

Cited by 32 publications

(7 citation statements)

References 17 publications

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“…The "go to" technology for a dynamic industrial adsorption process is an ion-exchange (IX) resin column. IX is used widely for water treatment within the nuclear industry [26,27]. However, the harsh operational conditions already detailed preclude the use of conventional IX technology [23].…”

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

confidence: 99%

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: The Challenges Of Aqueous Iodine Adsorption In the Nuclear Industrymentioning

confidence: 99%

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

et al. 2021

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“…Several volume reduction methods, e.g. incineration [16] and pyrolysis [17] can get high percentage of volume reduction. However, secondary waste will be produced in these processes.…”

Section: Introductionmentioning

confidence: 99%

Treatment of spent radioactive anionic exchange resins using Fenton-like oxidation process

Wan

Wang

2016

Chemical Engineering Journal

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“…Secondly, 200 mL of solution containing 15 mM in each of Cs + , Sr 2+ , and Co 2+ in 1 M HNO 3 were added into the Erlenmeyer flask and then mixed with the resins for 24 h with magnetic stirrer at room temperature to achieve ion exchange equilibrium. Finally, the solution from the flask was analyzed with atomic absorption spectrometric method which can determine the resin loading which was determined to be about 47% .…”

Section: Methodsmentioning

confidence: 99%

“…However, the solidified waste forms have high volume and weight which can be a problem for transportation, storage, and management. The indirect methods include incineration , pyrolysis , Fenton or Fenton‐like oxidation , supercritical water oxidation (SCWO) , plasma technology , and so on. Compared with direct methods, indirect methods lead to high volume reduction factor (VRF), and weight loss percentage.…”

Section: Introductionmentioning

confidence: 99%

Optimization of spent radioactive resins degradation by Fenton‐like oxidation using response surface methodology

Wan

Wang

2016

Env Prog and Sustain Energy

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The degradation of spent radioactive resin by Fenton‐like process with Cu2+ as catalyst was optimized using response surface methodology (RSM) based on Box–Behnken design (BBD) method. The influence of three independent variables like catalyst concentration, H2O2 dosage, and initial pH value on resin degradation was investigated. The weight loss percentage of resin was evaluated using the quadratic model. Analysis of variance showed that correlation coefficient (R2) of the model was 0.9786, providing a satisfactory approximation of quadratic model with the experimental data. Out of three factors, especially pH value had significant influence on the weight loss percentage of resin. The weight loss percentage increased as pH decreased from 2.25 to 0.75. The conditions for resin degradation were optimized as follows: pH = 0.75, H2O2 = 20 mL, and catalyst concentration was 0.25 M. The confirmation experiment carried out at optimal conditions using RSM. The weight loss percentage was 95.80%. The predicted weight loss percentage was 96.19%, indicating that RSM based on BBD was a reliable method to optimize the operational conditions for resin degradation by Fenton‐like process. Finally, the intermediates of resin degradation were analyzed by ion chromatograph and GC‐MS. © 2016 American Institute of Chemical Engineers Environ Prog, 35: 1590–1596, 2016

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Cation immobilization in pyrolyzed simulated spent ion exchange resins

Cited by 32 publications

References 17 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

Treatment of spent radioactive anionic exchange resins using Fenton-like oxidation process

Optimization of spent radioactive resins degradation by Fenton‐like oxidation using response surface methodology

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