Performance study of ion exchange resins solidification using metakaolin-based geopolymer binder

Lin, Wei-Hsiang; Chen, HsinYu; Huang, Chien-Chin

doi:10.1016/j.pnucene.2020.103508

Cited by 23 publications

(6 citation statements)

References 20 publications

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“…The chemistry and physics of the contact between metakaolin and alkalis (chemical reaction diversity, nature and kinetics; paste rheology; reaction product porosity and so on) are so peculiar that alkaline activation, a fairly narrow field of endeavour, has given rise to very intense scientific research, naturally attested to in detail in the literature ( Lin et al, 2020 ; Ambikakumari Sanalkumar et al, 2021 ). The understanding acquired to date on the alkaline activation of metakaolin is applicable to any metakaolin anywhere in the world.…”

Section: Alkali Activated Binders (Aabs)*mentioning

confidence: 99%

Portland Versus Alkaline Cement: Continuity or Clean Break: “A Key Decision for Global Sustainability”

et al. 2021

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This review undertakes rigorous analysis of much of the copious literature available to the scientific community on the use of alkali-activated binders (AABs) in construction. The authors’ main intention is to categorically refute arguments of that part of the scientific community underestimating or even dismissing the actual potential of AABs as alternatives to Portland cement (PC). The main premise invoked in support of those arguments is a presumed lack of material resources for precursors that would make AAB industrial-scale production unfeasible anywhere on the planet (a substantial number of scientific papers show that the raw materials required for AAB manufacture are in abundance worldwide). The review also analyses the role of alkaline activators in the chemistry of AABs; it is important to clarify and highlight that alkaline activators are not, by any means, confined to the two synthetic products (caustic soda and waterglass) mostly employed by researchers; other sustainable and efficient products are widely available. Finally, the review deals with the versatility of AAB production processes. The technologies required for the large scale manufacturing of AABs are mostly already in place in PC factories; actually no huge investment is required to transform a PC plant in a AAB factory; and quality and compositional uniformity of Alkaline Cements (binders produced through an industrial process) would be guaranteed. The last conclusions extracted from this review-paper are related with: i) the low carbon footprint of one-part AABs and ii) the urgent need of exploring standardization formulas allowing the commercial development of (sustainable) binders different from PC.

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Section: Alkali Activated Binders (Aabs)*mentioning

confidence: 99%

Portland Versus Alkaline Cement: Continuity or Clean Break: “A Key Decision for Global Sustainability”

et al. 2021

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“…Thus, a significant decrease in 137 Cs release was found during the physical immobilization of Cs-containing resin waste in a geopolymer matrix based on metakaolin [25]. The effect of increased immobilization was also observed for other radioactive resin wastes containing radionuclides 134 Cs, 60 Co, 154 Eu, and 152 Eu alkali-activated binders obtained from industrial by-products [26].…”

Section: Introductionmentioning

confidence: 70%

“…Due to their ability to bind cations, high mechanical properties, and chemical durability, these materials have recently attracted considerable interest, particularly as materials suitable for the conditioning of radioactive waste [22][23][24]. This is indicated by a number of studies [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Cs Immobilization within a Sodalite Framework: The Role of Alkaline Cations and the Si/Al Ratio

Kasprzhitskii,

Ermolov,

Mischinenko

et al. 2023

IJMS

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Conditioning of radioactive waste generated from the operation of medical institutions, nuclear cycle facilities, and nuclear facilities is important for the safety of the environment. One of the most hazardous radionuclides is radioactive cesium. There is a need for more effective solutions to contain radionuclides, especially cesium (Cs+). Geopolymers are promising inorganic materials that can provide a large active surface area with adjustable porosity and binding capacity. The existence of nanosized zeolite-like structures in aluminosilicate gels was shown earlier. These structures are candidates for immobilizing radioactive cesium (Cs+). However, the mechanisms of their interactions with the aluminosilicate framework related to radionuclide immobilization have not been well studied. In this work, the influence of alkaline cations (Na+ or K+) and the aluminosilicate framework structure on the binding capacity and mechanism of interaction of geopolymers with Cs+ is explored in the example of a sodalite framework. The local structure of the water molecules and alkaline ions in the equilibrium state and its behavior when the Si/Al ratio was changed were studied by DFT.

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“…1(b) ). Recently, Lin et al 16 also reported an uneven (heterogeneous) distribution of IERs in geopolymer waste form, where they worked on the solidification of IERs using metakaolin-based geopolymer binder. The authors observed that the IERs were located only in the upper half of geopolymer waste form.…”

Section: Resultsmentioning

confidence: 99%

Effect of ion exchange resin particle size on homogeneity and leachability of Cs and Co in polymer waste form

Kim

Singh

2021

RSC Adv.

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Performance study of ion exchange resins solidification using metakaolin-based geopolymer binder

Cited by 23 publications

References 20 publications

Portland Versus Alkaline Cement: Continuity or Clean Break: “A Key Decision for Global Sustainability”

Portland Versus Alkaline Cement: Continuity or Clean Break: “A Key Decision for Global Sustainability”

Mechanism of Cs Immobilization within a Sodalite Framework: The Role of Alkaline Cations and the Si/Al Ratio

Effect of ion exchange resin particle size on homogeneity and leachability of Cs and Co in polymer waste form

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