Enhanced adsorptive removal of cationic and anionic dyes from aqueous solutions by olive stone activated carbon
In this work, four activated carbons were synthetized from natural olive stone (NOS) wastes using ZnCl2 as an activating agent. These activated carbons (OSAC) were synthetized for a constant mass ratio of ZnCl2: NOS of 2:1, a contact time of 2 h and four different heating temperatures (300, 400, 450...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Académie des sciences
2021-02-01
|
| Series: | Comptes Rendus. Chimie |
| Subjects: | |
| Online Access: | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.54/ |
| _version_ | 1797651391117787136 |
|---|---|
| author | Mahmoudi, Khaled Hamdi, Noureddine Ben Ali, Mahassen Jellali, Salah Srasra, Ezzeddine |
| author_facet | Mahmoudi, Khaled Hamdi, Noureddine Ben Ali, Mahassen Jellali, Salah Srasra, Ezzeddine |
| author_sort | Mahmoudi, Khaled |
| collection | DOAJ |
| description | In this work, four activated carbons were synthetized from natural olive stone (NOS) wastes using ZnCl2 as an activating agent. These activated carbons (OSAC) were synthetized for a constant mass ratio of ZnCl2: NOS of 2:1, a contact time of 2 h and four different heating temperatures (300, 400, 450 and 500 °C). The physicochemical characterization of these activated carbons by various analyses including N2 adsorption–desorption measurements, surface charge evolution versus pH, Boehm titration, Fourier transform (FTIR) and scanning electron microscopy (SEM) showed that the activated carbon produced at a temperature of 400 °C (OSAC 400 °C) exhibited the best properties. Indeed, it has the highest BET surface area, total pore and micropore volumes with values of 740 m2${\cdot }$g$^{-1}$, 0.57 cm3${\cdot }$g$^{-1}$ and 0.25 cm3${\cdot }$g$^{-1}$, respectively. Moreover, it is rich in various acidic and basic functional groups that could react with various common adsorbents.The test of these activated carbons, for the adsorption of a cationic (methylene blue (MB)) and anionic (methyl orange (MO)) dye under various experimental conditions, showed that OSAC 400 °C could be considered as an effective, attractive and promising adsorbent for both the tested dyes. The Langmuir’s adsorption capacities of this adsorbent were assessed to 303.0 and 277.8 mg${\cdot }$g$^{-1}$ for MB and MO, respectively, which are significantly high compared to other various activated carbons. The retention of the pollutants is mainly chemical including hydrogen bond and electrostatic attraction between the dyes and the activated carbon surface. |
| first_indexed | 2024-03-11T16:14:18Z |
| format | Article |
| id | doaj.art-84e60e7205e74e6aaf689609c71d5536 |
| institution | Directory Open Access Journal |
| issn | 1878-1543 |
| language | English |
| last_indexed | 2024-03-11T16:14:18Z |
| publishDate | 2021-02-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Chimie |
| spelling | doaj.art-84e60e7205e74e6aaf689609c71d55362023-10-24T14:22:39ZengAcadémie des sciencesComptes Rendus. Chimie1878-15432021-02-012311-1268970410.5802/crchim.5410.5802/crchim.54Enhanced adsorptive removal of cationic and anionic dyes from aqueous solutions by olive stone activated carbonMahmoudi, Khaled0Hamdi, Noureddine1Ben Ali, Mahassen2Jellali, Salah3Srasra, Ezzeddine4Laboratory of Composite Materials and Clay Minerals, National Center of Research in Materials Sciences (CNRSM), B.P.73–8020. Soliman, TunisiaLaboratory of Composite Materials and Clay Minerals, National Center of Research in Materials Sciences (CNRSM), B.P.73–8020. Soliman Tunisia; Higher Institute of Water Science and Techniques of Gabes, University of Gabes, Zrig 6072, Gabes, TunisiaLaboratory of Composite Materials and Clay Minerals, National Center of Research in Materials Sciences (CNRSM), B.P.73–8020. Soliman TunisiaPEIE Research Chair for the Development of Industrial Estates and Free Zones, Center for Environmental Studies and Research, Sultan Qaboos University, Al-Khoud 123, OmanLaboratory of Composite Materials and Clay Minerals, National Center of Research in Materials Sciences (CNRSM), B.P.73–8020. Soliman TunisiaIn this work, four activated carbons were synthetized from natural olive stone (NOS) wastes using ZnCl2 as an activating agent. These activated carbons (OSAC) were synthetized for a constant mass ratio of ZnCl2: NOS of 2:1, a contact time of 2 h and four different heating temperatures (300, 400, 450 and 500 °C). The physicochemical characterization of these activated carbons by various analyses including N2 adsorption–desorption measurements, surface charge evolution versus pH, Boehm titration, Fourier transform (FTIR) and scanning electron microscopy (SEM) showed that the activated carbon produced at a temperature of 400 °C (OSAC 400 °C) exhibited the best properties. Indeed, it has the highest BET surface area, total pore and micropore volumes with values of 740 m2${\cdot }$g$^{-1}$, 0.57 cm3${\cdot }$g$^{-1}$ and 0.25 cm3${\cdot }$g$^{-1}$, respectively. Moreover, it is rich in various acidic and basic functional groups that could react with various common adsorbents.The test of these activated carbons, for the adsorption of a cationic (methylene blue (MB)) and anionic (methyl orange (MO)) dye under various experimental conditions, showed that OSAC 400 °C could be considered as an effective, attractive and promising adsorbent for both the tested dyes. The Langmuir’s adsorption capacities of this adsorbent were assessed to 303.0 and 277.8 mg${\cdot }$g$^{-1}$ for MB and MO, respectively, which are significantly high compared to other various activated carbons. The retention of the pollutants is mainly chemical including hydrogen bond and electrostatic attraction between the dyes and the activated carbon surface.https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.54/Olive stonesActivationZinc chlorideCharacterizationDyesAdsorption |
| spellingShingle | Mahmoudi, Khaled Hamdi, Noureddine Ben Ali, Mahassen Jellali, Salah Srasra, Ezzeddine Enhanced adsorptive removal of cationic and anionic dyes from aqueous solutions by olive stone activated carbon Comptes Rendus. Chimie Olive stones Activation Zinc chloride Characterization Dyes Adsorption |
| title | Enhanced adsorptive removal of cationic and anionic dyes from aqueous solutions by olive stone activated carbon |
| title_full | Enhanced adsorptive removal of cationic and anionic dyes from aqueous solutions by olive stone activated carbon |
| title_fullStr | Enhanced adsorptive removal of cationic and anionic dyes from aqueous solutions by olive stone activated carbon |
| title_full_unstemmed | Enhanced adsorptive removal of cationic and anionic dyes from aqueous solutions by olive stone activated carbon |
| title_short | Enhanced adsorptive removal of cationic and anionic dyes from aqueous solutions by olive stone activated carbon |
| title_sort | enhanced adsorptive removal of cationic and anionic dyes from aqueous solutions by olive stone activated carbon |
| topic | Olive stones Activation Zinc chloride Characterization Dyes Adsorption |
| url | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.54/ |
| work_keys_str_mv | AT mahmoudikhaled enhancedadsorptiveremovalofcationicandanionicdyesfromaqueoussolutionsbyolivestoneactivatedcarbon AT hamdinoureddine enhancedadsorptiveremovalofcationicandanionicdyesfromaqueoussolutionsbyolivestoneactivatedcarbon AT benalimahassen enhancedadsorptiveremovalofcationicandanionicdyesfromaqueoussolutionsbyolivestoneactivatedcarbon AT jellalisalah enhancedadsorptiveremovalofcationicandanionicdyesfromaqueoussolutionsbyolivestoneactivatedcarbon AT srasraezzeddine enhancedadsorptiveremovalofcationicandanionicdyesfromaqueoussolutionsbyolivestoneactivatedcarbon |