Batch Adsorption of Orange II Dye on a New Green Hydrogel—Study on Working Parameters and Process Enhancement
A new green hydrogel consisting of cherry stone (CS) powder and sodium alginate (SA) was synthesized through physical crosslinking. The product had a mean diameter of 3.95 mm, a moisture content of 92.28%, a bulk density of 0.58 g/cm<sup>3</sup>, and a swelling ratio of 45.10%. The analy...
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MDPI AG
2025-01-01
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| author | Andrei-Ionuț Simion Cristina-Gabriela Grigoraș Lidia Favier |
| author_facet | Andrei-Ionuț Simion Cristina-Gabriela Grigoraș Lidia Favier |
| author_sort | Andrei-Ionuț Simion |
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| description | A new green hydrogel consisting of cherry stone (CS) powder and sodium alginate (SA) was synthesized through physical crosslinking. The product had a mean diameter of 3.95 mm, a moisture content of 92.28%, a bulk density of 0.58 g/cm<sup>3</sup>, and a swelling ratio of 45.10%. The analyses of its morphological structure and functional groups by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR) showed the successful entrapping of the CS in the SA polymeric matrix. The viability of the prepared hydrogel as adsorbent was tested towards Orange II (OII) anionic dye. The influence of the <i>p</i>H, adsorbent amount, contact time, and initial dye concentration was evaluated. Then, the impact of three accelerating factors (stirring speed, ultrasound exposure duration, and temperature) on the OII retention was investigated. The highest recorded removal efficiency and adsorption capacity were 82.20% and 6.84 mg/g, respectively. The adsorption followed Elovich and pseudo-second-order kinetics, was adequately described by Freundlich and Khan isotherms, and can be defined as spontaneous, endothermic, and random. The experiments confirmed that the obtained hydrogel can be used acceptably for at least two consecutive cycles, sustaining its effectiveness in water decontamination. |
| format | Article |
| id | doaj-art-b76dea2415fd4f469c1016257496126b |
| institution | Kabale University |
| issn | 2310-2861 |
| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-b76dea2415fd4f469c1016257496126b2025-01-24T13:34:04ZengMDPI AGGels2310-28612025-01-011117910.3390/gels11010079Batch Adsorption of Orange II Dye on a New Green Hydrogel—Study on Working Parameters and Process EnhancementAndrei-Ionuț Simion0Cristina-Gabriela Grigoraș1Lidia Favier2Department of Food and Chemical Engineering, Faculty of Engineering, “Vasile Alecsandri” University of Bacău, Calea Mărăşeşti 157, 600115 Bacau, RomaniaDepartment of Food and Chemical Engineering, Faculty of Engineering, “Vasile Alecsandri” University of Bacău, Calea Mărăşeşti 157, 600115 Bacau, RomaniaEcole Nationale Supérieure de Chimie de Rennes, Univ. Rennes, CNRS, UMR 6226, CEDEX 7, 35708 Rennes, FranceA new green hydrogel consisting of cherry stone (CS) powder and sodium alginate (SA) was synthesized through physical crosslinking. The product had a mean diameter of 3.95 mm, a moisture content of 92.28%, a bulk density of 0.58 g/cm<sup>3</sup>, and a swelling ratio of 45.10%. The analyses of its morphological structure and functional groups by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR) showed the successful entrapping of the CS in the SA polymeric matrix. The viability of the prepared hydrogel as adsorbent was tested towards Orange II (OII) anionic dye. The influence of the <i>p</i>H, adsorbent amount, contact time, and initial dye concentration was evaluated. Then, the impact of three accelerating factors (stirring speed, ultrasound exposure duration, and temperature) on the OII retention was investigated. The highest recorded removal efficiency and adsorption capacity were 82.20% and 6.84 mg/g, respectively. The adsorption followed Elovich and pseudo-second-order kinetics, was adequately described by Freundlich and Khan isotherms, and can be defined as spontaneous, endothermic, and random. The experiments confirmed that the obtained hydrogel can be used acceptably for at least two consecutive cycles, sustaining its effectiveness in water decontamination.https://www.mdpi.com/2310-2861/11/1/79adsorptioncherry stonesdesorptionequilibrium isothermhydrogelkinetic study |
| spellingShingle | Andrei-Ionuț Simion Cristina-Gabriela Grigoraș Lidia Favier Batch Adsorption of Orange II Dye on a New Green Hydrogel—Study on Working Parameters and Process Enhancement Gels adsorption cherry stones desorption equilibrium isotherm hydrogel kinetic study |
| title | Batch Adsorption of Orange II Dye on a New Green Hydrogel—Study on Working Parameters and Process Enhancement |
| title_full | Batch Adsorption of Orange II Dye on a New Green Hydrogel—Study on Working Parameters and Process Enhancement |
| title_fullStr | Batch Adsorption of Orange II Dye on a New Green Hydrogel—Study on Working Parameters and Process Enhancement |
| title_full_unstemmed | Batch Adsorption of Orange II Dye on a New Green Hydrogel—Study on Working Parameters and Process Enhancement |
| title_short | Batch Adsorption of Orange II Dye on a New Green Hydrogel—Study on Working Parameters and Process Enhancement |
| title_sort | batch adsorption of orange ii dye on a new green hydrogel study on working parameters and process enhancement |
| topic | adsorption cherry stones desorption equilibrium isotherm hydrogel kinetic study |
| url | https://www.mdpi.com/2310-2861/11/1/79 |
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