Fluoride removal from aqueous solution via environmentally friendly adsorbent derived from seashell
Abstract Nowadays, the presence of excessive ions in water resources is of utmost concern and has attracted increasing attention; therefore, excessive amounts of these ions such as fluoride should be removed from drinking water. Conventional water treatment processes are shown to be incapable of the...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-06-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-13756-3 |
| _version_ | 1811251505529880576 |
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| author | Maryam Hashemkhani Mohammad Rezvani Ghalhari Parnia Bashardoust Sara Sadat Hosseini Alireza Mesdaghinia Amir Hossein Mahvi |
| author_facet | Maryam Hashemkhani Mohammad Rezvani Ghalhari Parnia Bashardoust Sara Sadat Hosseini Alireza Mesdaghinia Amir Hossein Mahvi |
| author_sort | Maryam Hashemkhani |
| collection | DOAJ |
| description | Abstract Nowadays, the presence of excessive ions in water resources is of utmost concern and has attracted increasing attention; therefore, excessive amounts of these ions such as fluoride should be removed from drinking water. Conventional water treatment processes are shown to be incapable of the complete removal of redundant fluoride from aqueous water bodies, whereas adsorption is a promising, effective, cost–benefit, and simple method for this purpose. This study aimed to synthesize effective adsorbents from bivalve shells and evaluate the adsorption function of bivalve shells in removing fluoride from aqueous solutions. In this study, the oyster shell was collected from the Persian Gulf’s seaside and were crushed by manual mortar and blender, and graded with standard sieves with 70 mesh size. The prepared bivalve shell was characterized by SEM and FTIR. To investigate and optimize various variables on fluoride removal percentage a response surface methodology based on central composite design (RSM-CCD) was used. Under optimal conditions (pH: 5.5, adsorbent dose: 0.3 g/L, contact time: 85 min and fluoride concentration: 3 mg/L) the maximum removal efficiency was 97.26%. Results showed that the adsorption equilibrium and kinetic data were matched with the isotherm Langmuir Model (R2 = 0.98) with qmax = 27.31 mg/g and pseudo-second-order reaction (R2 = 0.99). Also, a thermodynamic study exhibited that the adsorption process of fluoride into bivalve shells was an exothermic reaction and could not be a spontaneous adsorption process. Based on the results, the bivalve shell was found as an appropriate adsorbent to remove fluoride from aqueous solutions. |
| first_indexed | 2024-04-12T16:20:28Z |
| format | Article |
| id | doaj.art-e8f7644b3be344e88afda54f48474220 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-12T16:20:28Z |
| publishDate | 2022-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-e8f7644b3be344e88afda54f484742202022-12-22T03:25:34ZengNature PortfolioScientific Reports2045-23222022-06-0112111310.1038/s41598-022-13756-3Fluoride removal from aqueous solution via environmentally friendly adsorbent derived from seashellMaryam Hashemkhani0Mohammad Rezvani Ghalhari1Parnia Bashardoust2Sara Sadat Hosseini3Alireza Mesdaghinia4Amir Hossein Mahvi5Department of Electrical and Computer and Environment Engineering, West Tehran Branch-Islamic Azad UniversityDepartment of Environmental Health Engineering, School of Public Health, Tehran University of Medical SciencesDepartment of Environmental Health Engineering, School of Public Health, Tehran University of Medical SciencesDepartment of Environmental Health Engineering, School of Public Health, Tehran University of Medical SciencesDepartment of Environmental Health Engineering, School of Public Health, Tehran University of Medical SciencesDepartment of Environmental Health Engineering, School of Public Health, Tehran University of Medical SciencesAbstract Nowadays, the presence of excessive ions in water resources is of utmost concern and has attracted increasing attention; therefore, excessive amounts of these ions such as fluoride should be removed from drinking water. Conventional water treatment processes are shown to be incapable of the complete removal of redundant fluoride from aqueous water bodies, whereas adsorption is a promising, effective, cost–benefit, and simple method for this purpose. This study aimed to synthesize effective adsorbents from bivalve shells and evaluate the adsorption function of bivalve shells in removing fluoride from aqueous solutions. In this study, the oyster shell was collected from the Persian Gulf’s seaside and were crushed by manual mortar and blender, and graded with standard sieves with 70 mesh size. The prepared bivalve shell was characterized by SEM and FTIR. To investigate and optimize various variables on fluoride removal percentage a response surface methodology based on central composite design (RSM-CCD) was used. Under optimal conditions (pH: 5.5, adsorbent dose: 0.3 g/L, contact time: 85 min and fluoride concentration: 3 mg/L) the maximum removal efficiency was 97.26%. Results showed that the adsorption equilibrium and kinetic data were matched with the isotherm Langmuir Model (R2 = 0.98) with qmax = 27.31 mg/g and pseudo-second-order reaction (R2 = 0.99). Also, a thermodynamic study exhibited that the adsorption process of fluoride into bivalve shells was an exothermic reaction and could not be a spontaneous adsorption process. Based on the results, the bivalve shell was found as an appropriate adsorbent to remove fluoride from aqueous solutions.https://doi.org/10.1038/s41598-022-13756-3 |
| spellingShingle | Maryam Hashemkhani Mohammad Rezvani Ghalhari Parnia Bashardoust Sara Sadat Hosseini Alireza Mesdaghinia Amir Hossein Mahvi Fluoride removal from aqueous solution via environmentally friendly adsorbent derived from seashell Scientific Reports |
| title | Fluoride removal from aqueous solution via environmentally friendly adsorbent derived from seashell |
| title_full | Fluoride removal from aqueous solution via environmentally friendly adsorbent derived from seashell |
| title_fullStr | Fluoride removal from aqueous solution via environmentally friendly adsorbent derived from seashell |
| title_full_unstemmed | Fluoride removal from aqueous solution via environmentally friendly adsorbent derived from seashell |
| title_short | Fluoride removal from aqueous solution via environmentally friendly adsorbent derived from seashell |
| title_sort | fluoride removal from aqueous solution via environmentally friendly adsorbent derived from seashell |
| url | https://doi.org/10.1038/s41598-022-13756-3 |
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