Kinetic and equilibrium adsorption parameters estimation based on a heterogeneous intraparticle diffusion model

Silva, Luís M. S.; Muñoz-Peña, María J.; Domínguez, Joaquín R.; González, Teresa Artola; Cuerda-Correa, Eduardo M.

doi:10.1016/j.surfin.2020.100791

Cited by 26 publications

(13 citation statements)

References 39 publications

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“…5b), is depicted by the following eqn (3). 45,46 q t = k id t 1/2 + C where K id is the intraparticle kinetic parameter that was obtained from the slope of the plot. The plot is multilinear in nature showing several steps taking place: the first portion of the plot is related to external diffusion; the second portion explains gradual diffusion of dyes into the pore, indicating that diffusion is the rate –limiting step; the last part is related to equilibrium adsorption.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of a novel perovskite-carbon aerogel hybrid adsorbent with multiple metal-Lewis active sites for the removal of dyes from water: experimental and DFT studies

et al. 2023

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Section: Resultsmentioning

confidence: 99%

Synthesis of a novel perovskite-carbon aerogel hybrid adsorbent with multiple metal-Lewis active sites for the removal of dyes from water: experimental and DFT studies

et al. 2023

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“…Pseudo-first-order model is constantly used to fit the kinetic data and to calculate the equilibrium adsorption amount and to define how fast the equilibrium is reached while pseudo-second-order model correlates the adsorption with the active sites existing on the adsorbent material [ 49 ]. Intraparticle diffusion model assumes that the adsorption rate is controlled by one of the three steps of the process: film diffusion, adsorbate diffusion into the pores and surface adsorption [ 50 ].…”

Section: Resultsmentioning

confidence: 99%

Encapsulation of Saccharomyces pastorianus Residual Biomass in Calcium Alginate Matrix with Insights in Ethacridine Lactate Biosorption

et al. 2022

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Pharmaceuticals are recognized as emerging water microcontaminants that have been reported in several aquatic environments worldwide; therefore, the elimination of these pollutants is a global challenge. This study aimed to develop a biosorbent based on Saccharomyces pastorianus residual biomass encapsulated in a calcium alginate matrix and to evaluate its biosorption performance to remove Ethacridine Lactate (EL) from aqueous solutions. Firstly, the synthesis and characterization of biosorbent has been carried out. Then, the impact of main parameters on biosorption process were investigated by batch experiments. Finally, the kinetics behavior and equilibrium isotherms were evaluated. The resulted beads have an irregular and elongated shape with about 1.89 mm ± 0.13 mm in size with a homogeneous structure. The best removal efficiency for EL of over 85% was obtained at acidic pH 2 and 25 °C for 50 mg/L initial concentration and 2 g/L biosorbent dose. The pseudo-second-order and intraparticle diffusion kinetics describe the biosorption process. The maximum calculated biosorption capacity was 21.39 mg/g similar to that recorded experimentally. The equilibrium biosorption data were a good fit for Freundlich and Dubinin–Radushkevich isotherms. Our findings reveal that the low cost and eco-friendly obtained biosorbent can be easily synthesized and suitable to remove Ethacridine Lactate from water matrices.

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“…The initial stage represents surface adsorption, the second stage is attributed to intraparticle diffusion, and the final stage corresponds to the adsorption equilibrium stage, in which intraparticle diffusion begins to slow down due to the saturation of active adsorption sites. These multilinear curves may be assigned to adsorption at irregular and non‐uniform sites positions in the steps 36 …”

Section: Resultsmentioning

confidence: 99%

“…These multilinear curves may be assigned to adsorption at irregular and non-uniform sites positions in the steps. 36…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Highly efficient and fast adsorption of Au(III) and Pd(II) by crosslinked polyethyleneimine‐glutaraldehyde

Zhang

et al. 2022

AIChE Journal

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An adsorbent (PEI‐GA) is prepared by crosslinking polyethyleneimine with glutaraldehyde. PEI‐GA shows outstanding adsorption performance towards Au(III) and Pd(II). PEI‐GA presents large adsorption capacity towards Au(III) in a wide application pH range from 1 to 9. The adsorption capacities of PEI‐GA for Au(III) and Pd(II) at 25°C reach 2575 and 497 mg/g, respectively. Au(III) and Pd(II) can be adsorbed completely within 10 min for 8.3 mg/L Au(III) and 20 min for 9.7 mg/L Pd(II). The adsorption equilibrium time required for 523.9 mg/L Au(III) and for 565.6 mg/L Pd(II) is 2 and 9 h, respectively. The Sips model is the most suitable to describe the adsorption isotherms which leads to more realistic adsorption capacities for both metals. PEI‐GA also exhibits high selectivity and repeatability towards Au(III) and Pd(II). The adsorption mechanism involves redox, chelation coordination, and electrostatic interactions for Au(III), and coordination and electrostatic interactions for Pd(II).

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Kinetic and equilibrium adsorption parameters estimation based on a heterogeneous intraparticle diffusion model

Cited by 26 publications

References 39 publications

Synthesis of a novel perovskite-carbon aerogel hybrid adsorbent with multiple metal-Lewis active sites for the removal of dyes from water: experimental and DFT studies

Synthesis of a novel perovskite-carbon aerogel hybrid adsorbent with multiple metal-Lewis active sites for the removal of dyes from water: experimental and DFT studies

Encapsulation of Saccharomyces pastorianus Residual Biomass in Calcium Alginate Matrix with Insights in Ethacridine Lactate Biosorption

Highly efficient and fast adsorption of Au(III) and Pd(II) by crosslinked polyethyleneimine‐glutaraldehyde

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