Removal of cationic dye using alginate–organobentonite composite beads

Oussalah, Asma; Boukerroui, Abdelhamid

doi:10.1007/s41207-020-00199-3

Cited by 10 publications

(4 citation statements)

References 51 publications

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“…The values of isotherm models indicate that experimental data is well fitted with Langmuir data than Freundlich data for both dyes. It is therefore deduced that the adsorption of both dyes on the surface of raw corncob is homogeneous in nature [ 54 ].…”

Section: Resultsmentioning

confidence: 99%

Adsorption of anionic dyes from textile wastewater utilizing raw corncob

Salih

Kareem

Anwer

2022

Heliyon

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Section: Resultsmentioning

confidence: 99%

Adsorption of anionic dyes from textile wastewater utilizing raw corncob

Salih

Kareem

Anwer

2022

Heliyon

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“…Therefore, organoclays modified with cationic surfactants exhibit strong interactions with textile dyes, driven by the hydrophobic affinity among the dye molecules and the clay surfaces [7]- [9]. As a result, clays have found widespread use in various environmental applications, such as the removal of pollutants like anionic dyes [10,11], cationic dyes [12], [13], heavy metals [14]- [16], etc. from wastewater, either alone or in composite form with other materials.…”

Section: Introductionmentioning

confidence: 99%

Modification Technique Influence on the Adsorption Capability of Organobentonites for Reactive and Direct Dyes

Morsümbül,

Akçakoca Kumbasar,

Yapar

2024

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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In this study, the adsorption of reactive and direct dyes from synthetic textile wastewater using organobentonites modified by two different routes was studied. Except for the drying step, the synthesis conditions were the same, and organobentonites were synthesized by employing a cationic surfactant at a level corresponding to the entire cation exchange capacity of bentonite under microwave irradiation. In the final step, the samples were dried using either a freeze dryer or an air dryer. The structural characteristics of the organobentonites were determined via XRD and FTIR analyses. The obtained equilibrium data indicated that the adsorption process fitted to the Langmuir isotherm model for both dyes. Although the results indicated that both organobentonites adsorbed two of the dyes, the freeze-dried sample could serve as a more effective adsorbent for removing reactive and direct dyes from wastewater.

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“…For the specific case of organoclay-alginate hydrogels, these compounds have been used in the removal of cationic dyes such as methylene blue [23,39,45,46]; anionic dyes such as methyl orange [23], Allura red [47], acid green B, and direct pink 3B [40]; and ionic such as ClO 4 − , Sr 2+ , Cu 2+ , and Cr 6+ [48,49]. Results of the above studies indicate that organoclayalginate composites are promising adsorbents for the remediation of the aqueous solutions contaminated with dyes and metal ions.…”

Section: Introductionmentioning

confidence: 99%

“…In the reviewed literature, the studies on removing cationic and anionic dyes with organoclay/alginate hydrogels were performed by batch discontinuous adsorption [23,39,40,[45][46][47]. This is the first investigation focused on the adsorption of an anionic dye with organobentonite that is encapsulated in an alginate matrix on a fixed-bed column.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Acid Yellow 23 Dye on Organobentonite/Alginate Hydrogel Beads in a Fixed-Bed Column

Rivera-Arenas,

Macías-Quiroga,

Dávila-Arias

et al. 2023

J. Compos. Sci.

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This research evaluates the use of organoclay/alginate hydrogels in removing Acid Yellow 23 in a fixed-bed column and contributes to the application of these composites in the context of the adsorption of anionic dyes that are present in wastewater. An organobentonite (OBent) was synthesized and encapsulated in an alginate matrix, using Ca2+ ions as a crosslinking agent. Experiments in fixed-bed columns showed that breakthrough and exhaustion times were longer with increasing bed height, which decreased with increases in flow rate and initial dye concentration. The Thomas, Yoon–Nelson, and Adams–Bohart models were well fitted to the experimental data for the breakthrough curves with high Adj. R2 correlation coefficients and low values of χ2. The theoretical adsorption capacity of the organobentonite/alginate hydrogel calculated from the Thomas model was 0.50 ± 0.01 mg/g (equivalent to 30.97 mg/g OBent), and this was obtained by using a 15 cm (10.10 g) bed height, 1 mL/min flow rate, and a 45 mg/L input dye concentration. The bed was regenerated with a 0.5 M NaOH solution, and the reuse of the saturated column bed was studied for two adsorption–desorption cycles. The results obtained in this study suggest the potential use of an organoclay/alginate hydrogel for the adsorption of pollutants in continuous systems.

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Removal of cationic dye using alginate–organobentonite composite beads

Cited by 10 publications

References 51 publications

Adsorption of anionic dyes from textile wastewater utilizing raw corncob

Adsorption of anionic dyes from textile wastewater utilizing raw corncob

Modification Technique Influence on the Adsorption Capability of Organobentonites for Reactive and Direct Dyes

Adsorption of Acid Yellow 23 Dye on Organobentonite/Alginate Hydrogel Beads in a Fixed-Bed Column

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