Mechanosynthesis, characterization, and adsorptive properties of Mg–Al-LDH and Zn–Al-LDH for olive mill wastewater treatment
Industrial olive oil production is of fundamental economic importance for many Mediterranean countries. However, this industry generates huge amounts of toxic olive mill wastewater (OMW), which could represent a serious threat to human health and environmental biodiversity. In the current study, cal...
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Académie des sciences
2024-01-01
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| Series: | Comptes Rendus. Chimie |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.265/ |
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| author | Hosni, Khaled Mahmoudi, Khaled Haraketi, Manel Jellali, Salah Srasra, Ezzeddine |
| author_facet | Hosni, Khaled Mahmoudi, Khaled Haraketi, Manel Jellali, Salah Srasra, Ezzeddine |
| author_sort | Hosni, Khaled |
| collection | DOAJ |
| description | Industrial olive oil production is of fundamental economic importance for many Mediterranean countries. However, this industry generates huge amounts of toxic olive mill wastewater (OMW), which could represent a serious threat to human health and environmental biodiversity. In the current study, calcined layered double hydroxides (LDHs) were synthesized through a mechanochemical process involving the manual grinding of magnesium or zinc- and aluminum-nitrate salts in an agate mortar, followed or not by a peptization process. The experimental results showed that non-peptized LDHs have a layered structure with relatively low crystallinity. However, the peptization process resulted in LDHs with regular particles exhibiting high crystallinity and thermal stability. These LDHs achieved a significant improvement in the quality of OMW. Indeed, after 44 h of contact time, the removed amounts of chemical oxygen demand (COD) and biological oxygen demand (BOD) were assessed at approximately 300 and 100 mg${\cdot }$g$^{-1}$, respectively. Moreover, the discoloration rate of this effluent was more than 90%. Overall, the results demonstrate the convenience of the mechanosynthesis of hydrotalcite and the high efficiency of OMW treatment, which is promising for the potential applications of calcined LDH in environmental clean-up and remediation of contaminated water. |
| format | Article |
| id | doaj-art-2ebff639bd104404be9ffd569bfe1731 |
| institution | Kabale University |
| issn | 1878-1543 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Académie des sciences |
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| series | Comptes Rendus. Chimie |
| spelling | doaj-art-2ebff639bd104404be9ffd569bfe17312025-02-07T13:37:38ZengAcadémie des sciencesComptes Rendus. Chimie1878-15432024-01-0126S111312810.5802/crchim.26510.5802/crchim.265Mechanosynthesis, characterization, and adsorptive properties of Mg–Al-LDH and Zn–Al-LDH for olive mill wastewater treatmentHosni, Khaled0https://orcid.org/0000-0002-3928-2434Mahmoudi, Khaled1https://orcid.org/0000-0001-6210-1673Haraketi, Manel2https://orcid.org/0009-0006-0677-5108Jellali, Salah3https://orcid.org/0000-0002-4095-4154Srasra, Ezzeddine4University of Carthage, National Center for Research in Materials Sciences (CNRSM), Laboratory of Composite Materials and Clay Minerals, Soliman, TunisiaUniversity of Carthage, National Center for Research in Materials Sciences (CNRSM), Laboratory of Composite Materials and Clay Minerals, Soliman, TunisiaUniversity of Carthage, National Center for Research in Materials Sciences (CNRSM), Laboratory of Composite Materials and Clay Minerals, Soliman, TunisiaCentre for Environmental Studies and Research, Sultan Qaboos University, Al-Khoud 123, OmanUniversity of Carthage, National Center for Research in Materials Sciences (CNRSM), Laboratory of Composite Materials and Clay Minerals, Soliman, TunisiaIndustrial olive oil production is of fundamental economic importance for many Mediterranean countries. However, this industry generates huge amounts of toxic olive mill wastewater (OMW), which could represent a serious threat to human health and environmental biodiversity. In the current study, calcined layered double hydroxides (LDHs) were synthesized through a mechanochemical process involving the manual grinding of magnesium or zinc- and aluminum-nitrate salts in an agate mortar, followed or not by a peptization process. The experimental results showed that non-peptized LDHs have a layered structure with relatively low crystallinity. However, the peptization process resulted in LDHs with regular particles exhibiting high crystallinity and thermal stability. These LDHs achieved a significant improvement in the quality of OMW. Indeed, after 44 h of contact time, the removed amounts of chemical oxygen demand (COD) and biological oxygen demand (BOD) were assessed at approximately 300 and 100 mg${\cdot }$g$^{-1}$, respectively. Moreover, the discoloration rate of this effluent was more than 90%. Overall, the results demonstrate the convenience of the mechanosynthesis of hydrotalcite and the high efficiency of OMW treatment, which is promising for the potential applications of calcined LDH in environmental clean-up and remediation of contaminated water.https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.265/Layered double hydroxidesMechanochemistryPeptizationOlive mill wastewater treatment |
| spellingShingle | Hosni, Khaled Mahmoudi, Khaled Haraketi, Manel Jellali, Salah Srasra, Ezzeddine Mechanosynthesis, characterization, and adsorptive properties of Mg–Al-LDH and Zn–Al-LDH for olive mill wastewater treatment Comptes Rendus. Chimie Layered double hydroxides Mechanochemistry Peptization Olive mill wastewater treatment |
| title | Mechanosynthesis, characterization, and adsorptive properties of Mg–Al-LDH and Zn–Al-LDH for olive mill wastewater treatment |
| title_full | Mechanosynthesis, characterization, and adsorptive properties of Mg–Al-LDH and Zn–Al-LDH for olive mill wastewater treatment |
| title_fullStr | Mechanosynthesis, characterization, and adsorptive properties of Mg–Al-LDH and Zn–Al-LDH for olive mill wastewater treatment |
| title_full_unstemmed | Mechanosynthesis, characterization, and adsorptive properties of Mg–Al-LDH and Zn–Al-LDH for olive mill wastewater treatment |
| title_short | Mechanosynthesis, characterization, and adsorptive properties of Mg–Al-LDH and Zn–Al-LDH for olive mill wastewater treatment |
| title_sort | mechanosynthesis characterization and adsorptive properties of mg al ldh and zn al ldh for olive mill wastewater treatment |
| topic | Layered double hydroxides Mechanochemistry Peptization Olive mill wastewater treatment |
| url | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.265/ |
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