Evaluation of the adsorption kinetics of brilliant green dye onto a montmorillonite/alginate composite beads by the shrinking core model

Dominguez, Marina Alejandra; Etcheverry, Mariana; Zanini, Graciela Pilar

doi:10.1007/s10450-019-00101-w

Cited by 19 publications

(7 citation statements)

References 45 publications

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“…It is known from cationic dyes adsorption on A-MMT beads that adsorption occurs by dye migration from bead surface to inner bead and that the extent of this migration depends on the initial concentration. 59 Therefore, at low concentrations of BAC-12 adsorbed two clay populations with different interlaminar spacing are observed. Fig.…”

Section: Resultsmentioning

confidence: 93%

Adsorption of cationic surfactant as a probe of the montmorillonite surface reactivity in the alginate hydrogel composites

et al. 2022

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Section: Resultsmentioning

confidence: 93%

Adsorption of cationic surfactant as a probe of the montmorillonite surface reactivity in the alginate hydrogel composites

et al. 2022

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“…Based on literature data, adsorption is an attractive and favorable technique for dye removal due to its simplicity, low operating cost, high efficiency and low energy consumption [ 26 ]. Moreover, the adsorbent can be recovered and reused [ 22 ].…”

Section: Resultsmentioning

confidence: 99%

Evaluation of the Adsorption and Desorption Dynamics of Beet Juice Red Dye on Alginate Microbeads

Birkić

Valinger

Tušek

et al. 2021

Gels

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The use of alginate microcapsules has often been mentioned as one of the ways to remove dyes from waste solvents, water and materials from the food industry. In addition, alginate can be used as a wall material for the microencapsulation of food dyes and their further application in the food industry. The aims of this study were to: (i) determine the effect of the alginate concentration (1, 2, 3 and 4%) on the ability of the adsorption and desorption of natural beetroot red dye and (ii) evaluate the kinetic parameters of the adsorption and desorption process, as well as the factors affecting and limiting those processes. According to the obtained results, the viscosity of alginate solutions increased with an increase in the alginate concentration. Based on k2 values (the pseudo-second order kinetic rate constant), when a more concentrated solution of alginate was used in the adsorption process, the beads adsorbed a smaller amount of dye. Furthermore, based on the values for n derived from the Korsmeyer–Peppas model, the dye release rates (k) were higher for beads made with lower alginate concentrations, and this release was governed by a pseudo-Fickian diffusion mechanism (n values ranged from 0.2709 to 0.3053).

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“…Perhaps the most notable property of ALG is that paired guluronic units are able to accommodate divalent ions (e.g., calcium, copper, strontium, barium, etc. ), enabling the formation of hydrogel beads, with few mm in diameter [6][7][8] and large internal pores (150-400 µm). 9,10 While the application of these porous beads in the food, 11,12 biomedical, 9,13,14 or pharmaceutical 15,16 industries is already established, several groups have recently explored the possibility to used them as sorbents materials for solid phase extraction.…”

Section: Introductionmentioning

confidence: 99%

Lab-on-a-Bead: Polymeric Natural Deep Eutectic Solvents as a Versatile Platform for (Bio)sensor Design

Gomez

Vidal

Zanini

et al. 2023

Preprint

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Natural polymers offer not only low-cost, wide availability, biocompatibility, and biodegradability but also a rich chemical functionality towards custom modifications and new applications. Among those, sodium alginate (ALG) offers a number of competitive advantages, including the possibility to form beads by a simple process call spherification as well as their modification by a wide number of processes, including the possibility to mixing the alginate solution with deep eutectic solvents (DES). Thus, and considering the capacity of DES to stabilize enzymes, the main objective of this work was to design and fabricate a new PODES (using ALG as one of the components, ALGPODES) and to deploy this material as a new phase to develop colorimetric biosensors. The formed beads displayed a narrow size distribution (2.9 0.1 mm) and a permeable structure with large internal cavities (25-100 m). The applicability of these beads towards analytical applications (lab-on-a-bead) was demonstrated by integrating three sensing platforms and by their application in real food samples.

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Evaluation of the adsorption kinetics of brilliant green dye onto a montmorillonite/alginate composite beads by the shrinking core model

Cited by 19 publications

References 45 publications

Adsorption of cationic surfactant as a probe of the montmorillonite surface reactivity in the alginate hydrogel composites

Adsorption of cationic surfactant as a probe of the montmorillonite surface reactivity in the alginate hydrogel composites

Evaluation of the Adsorption and Desorption Dynamics of Beet Juice Red Dye on Alginate Microbeads

Lab-on-a-Bead: Polymeric Natural Deep Eutectic Solvents as a Versatile Platform for (Bio)sensor Design

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