Kinetic and thermodynamic study of Eu(III) sorption on natural red earth in South China

Yu, Tao; Wu, Wangsuo; Liu, Zhirong; Zhang, Siwei; Nie, Zhengwei

doi:10.1007/s11814-012-0130-0

Cited by 9 publications

(2 citation statements)

References 24 publications

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“…The sorption capacities of the new nanocomposite toward Eu(III) and Sr(II) are compared with those of other various types of sorbents cited in the literature. ,,− As reported in Table , the equilibrium times of adsorption processes of Eu(III) and Sr(II) onto nanocomposite are faster than that for the other adsorbents. In our work the equilibrium is faster and reached at ∼15 min for both Eu(III) and Sr(II), while the least equilibrium times reported by other works were reached at ∼30 min for Eu(III) and Sr(II) …”

Section: Resultsmentioning

confidence: 99%

NanoTafla Nanocomposite as a Novel Low-Cost and Eco-Friendly Sorbent for Strontium and Europium Ions

et al. 2022

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Now the wide use of nanooxides is attributed to their remarkable collection of properties. Nanocomposites have an impressive variety of important applications. A thermal decomposition approach provides a more optimistic method for nanocrystal synthesis due to the low cost, high efficiency, and expectations for large-scale production. Therefore, in this study a new eco-friendly nanooxide composite with sorption characteristics for europium (Eu(III)) and strontium (Sr(II)) was synthesized by a one-step thermal treatment process using earth-abundant tafla clay as a starting material to prepare a modified tafla (M-Taf) nanocomposite. The synthesized nancomposite was characterized by different techniques before and after sorption processes. Different factors that affected the sorption behavior of Eu(III) and Sr(II) in aqueous media by the M-Taf nanocomposite were studied. The results obtained illustrated that the kinetics of sorption of Eu(III) and Sr(II) by the M-Taf nanocomposite are obeyed according to the pseudo-second order and controlled by a Langmuir isotherm model with maximum sorption capacities ( Q max ) of 25.5 and 23.36 mg/g for Eu(III) and Sr(II), respectively. Also, this novel low-cost and eco-friendly sorbent has promising properties and can be used to separate and retain some radionuclides in different applications.

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Section: Resultsmentioning

confidence: 99%

NanoTafla Nanocomposite as a Novel Low-Cost and Eco-Friendly Sorbent for Strontium and Europium Ions

et al. 2022

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“…In many previous sorption studies, the process of sorption kinetics or thermodynamics are frequently described by linear regression, and used to determine the best‐fitting isotherm . According to our studies, non‐linear method is a better method to obtain isotherm parameters and further describe kinetics and thermodynamics process …”

Section: Introductionmentioning

confidence: 86%

Study on the Sorption of Eu(III) onto Natural Red Earth and its Solid Components by Linear and Non‐Linear Methods

Liang

2017

Bulletin Korean Chem Soc

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The sorption of Eu(III) on natural red earth (NRE), iron oxides removed red earth (IORRE), and organic matter removed red earth (OMRRE) were studied under ambient conditions. The kinetic and thermodynamic studies of Eu(III) sorption were discussed by linear and non‐linear approaches. The results showed that sorption of Eu(III) on the three red earth was strongly dependent on ionic strength below pH~7.0 and independent of ionic strength above pH~7.0. Ion exchange, outer‐sphere surface complexes, and inner‐sphere surface complexes were controlling Eu(III) sorption in the whole observed pH range. Furthermore, the presence of iron oxides can inhibit Eu(III) sorption to some extent; however, organic matters enhance Eu(III) sorption in a certain range of pH and temperature. Sorption of Eu(III) on red earth samples can be represented by a pseudo‐second‐order rate equation, and the non‐linear pseudo‐second‐order kinetic expression could fit the kinetics better compared with the linear forms. Freundlich non‐linear isotherm model is the best‐fit model to Eu(III) sorption on the samples. Meanwhile, non‐linear method is found to be a better way to describe the sorption kinetics and thermodynamics than the linear method.

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Insights into sorption species of Eu(III) on γ-Al2O3 and bentonite under different pH: Studies at macro- and micro-scales

Fan

Zheng

et al. 2013

J Radioanal Nucl Chem

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Kinetic and thermodynamic study of Eu(III) sorption on natural red earth in South China

Cited by 9 publications

References 24 publications

NanoTafla Nanocomposite as a Novel Low-Cost and Eco-Friendly Sorbent for Strontium and Europium Ions

NanoTafla Nanocomposite as a Novel Low-Cost and Eco-Friendly Sorbent for Strontium and Europium Ions

Study on the Sorption of Eu(III) onto Natural Red Earth and its Solid Components by Linear and Non‐Linear Methods

Insights into sorption species of Eu(III) on γ-Al2O3 and bentonite under different pH: Studies at macro- and micro-scales

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