Modelling the reaction of uranium with carboxylic groups on surfaces through mono- and multi- dentate surface complexes on the basis of pH and redox potential

McGowan, S.; Degueldre, C.; Aiouache, Farid

doi:10.1016/j.colsuc.2023.100002

Cited by 2 publications

(1 citation statement)

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“…Single-component zirconium metal adsorbent is usually less efficient in uptake of contaminants due to the similarity in Lewis acid characteristics between adsorbent and adsorbate. When the zirconium is incorporated with other materials such as metals and anions (e.g., zirconium phosphate), the roles of ion exchange and electrostatic attraction become more significant, leading to better uptake (Zhao et al, 2016;McGowan et al, 2023).…”

Section: Adsorption Mechanismsmentioning

confidence: 99%

Performance of removing aqueous contaminant by zirconium based adsorbents: a critical review

Zhao,

Yang,

Chen

2024

Front. Chem. Eng.

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The studies on materials for decontamination in aqueous solutions have increasingly received greater attentions. Such contaminants as heavy metals, arsenic, fluoride and phosphate are harmful to humans and aqueous species due to higher toxicity. Zirconium based adsorbents have become more attractive due to outstanding performance in decontamination. This article provides a comprehensive review of the performance and mechanisms of five types adsorbents: zirconium (hydro)oxides, zirconium hydrogen sulfate, zirconium based multiple metal typed adsorbents and zirconium impregnated complexes. The pseudo-first order and pseudo-second order equations and the intraparticle diffusion model can be applied in describing the adsorption kinetics, while Langmuir and Freundlich equations are the most commonly used adsorption isotherms. The important mechanisms for uptake of contaminants are: ligand exchange between adsorbate and adsorbent, surface complexation formation, and Lewis acid–base and electrostatic interactions. A series of successful studies demonstrate that the adsorbents are promising for removing aqueous contaminants.

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Section: Adsorption Mechanismsmentioning

confidence: 99%