A Comparison Study on Defluoridation Capabilities Using <i>Syzygium cumini</i> and <i>Psidium guajava</i>: Process Optimization, Isotherm, Kinetic, Reusability Studies
For the first time, this work conducted a comparison of two indigenous plants in Iran, namely, <i>Syzygium cumini</i> and <i>Psidium guajava</i>, which were prepared as low-cost adsorbents to remove fluoride contamination from aqueous solution. The results revealed the nonlin...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/23/3939 |
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| author | Malihe Qazi Hamze Ali Jamali Reza Darvishi Cheshmeh Soltani Mahmoud Nasr Adel Kamyab Rudsari Reza Ghanbari |
| author_facet | Malihe Qazi Hamze Ali Jamali Reza Darvishi Cheshmeh Soltani Mahmoud Nasr Adel Kamyab Rudsari Reza Ghanbari |
| author_sort | Malihe Qazi |
| collection | DOAJ |
| description | For the first time, this work conducted a comparison of two indigenous plants in Iran, namely, <i>Syzygium cumini</i> and <i>Psidium guajava</i>, which were prepared as low-cost adsorbents to remove fluoride contamination from aqueous solution. The results revealed the nonlinearity of the interactive effects and showed that the pH and adsorbent dosage were the most influential factors during fluoride adsorption. The results of characterization exhibited a mesoporous structure of prepared biosorbents; therefore, the adsorption process may involve multiple functional groups, resulting in electrostatic attraction and hydrogen binding between fluoride ions and the biosorbents. In the case of <i>Syzygium cumini</i>, the maximum removal efficiency of 72.5% was obtained under optimum experimental conditions (C<sub>o</sub> = 6 mg/L, pH = 5, adsorbent dose = 8 g/L, and contact time = 75 min). For the <i>Psidium guajava</i>, the maximum removal efficiency of 88.3% was achieved at a C<sub>o</sub> of 6 mg/L, adsorbent dose of 6 g/L, initial pH of 5.1, and a contact time of 90 min. Moreover, four consecutive adsorption/desorption cycles with the chemical agent of NaOH solution (0.1 mol/L) showed excellent reusability of the biosorbents. The adsorption isotherm fitted better to the Langmuir model and the kinetic data best accorded with the pseudo-second-order kinetic model for both biosorbents, expressing a monolayer chemisorption process with recorded maximum adsorption capacities of 1.14 and 1.50 mg/g for <i>Syzygium cumini</i> and <i>Psidium guajava</i>, respectively. Therefore, given their removal capacity and potential utility, the prepared biomass could be effective reusable biosorbents to treat water contaminated with fluoride. |
| first_indexed | 2024-03-09T17:28:19Z |
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| id | doaj.art-c2c4f90652924b5291d7cd531fd90063 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T17:28:19Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-c2c4f90652924b5291d7cd531fd900632023-11-24T12:33:48ZengMDPI AGWater2073-44412022-12-011423393910.3390/w14233939A Comparison Study on Defluoridation Capabilities Using <i>Syzygium cumini</i> and <i>Psidium guajava</i>: Process Optimization, Isotherm, Kinetic, Reusability StudiesMalihe Qazi0Hamze Ali Jamali1Reza Darvishi Cheshmeh Soltani2Mahmoud Nasr3Adel Kamyab Rudsari4Reza Ghanbari5Department of Environmental Health Engineering, School of Health, Qazvin University of Medical Sciences, Qazvin 34199-15315, IranDepartment of Environmental Health Engineering, School of Health, Qazvin University of Medical Sciences, Qazvin 34199-15315, IranDepartment of Environmental Health Engineering, School of Health, Arak University of Medical Sciences, Arak 38196-93345, IranEnvironmental Engineering Department, Egypt-Japan University of Science and Technology (E-JUST), New Borg El-Arab City, Alexandria 21934, EgyptDepartment of Environmental Health Engineering, School of Health, Qazvin University of Medical Sciences, Qazvin 34199-15315, IranDepartment of Environmental Health Engineering, School of Health, Qazvin University of Medical Sciences, Qazvin 34199-15315, IranFor the first time, this work conducted a comparison of two indigenous plants in Iran, namely, <i>Syzygium cumini</i> and <i>Psidium guajava</i>, which were prepared as low-cost adsorbents to remove fluoride contamination from aqueous solution. The results revealed the nonlinearity of the interactive effects and showed that the pH and adsorbent dosage were the most influential factors during fluoride adsorption. The results of characterization exhibited a mesoporous structure of prepared biosorbents; therefore, the adsorption process may involve multiple functional groups, resulting in electrostatic attraction and hydrogen binding between fluoride ions and the biosorbents. In the case of <i>Syzygium cumini</i>, the maximum removal efficiency of 72.5% was obtained under optimum experimental conditions (C<sub>o</sub> = 6 mg/L, pH = 5, adsorbent dose = 8 g/L, and contact time = 75 min). For the <i>Psidium guajava</i>, the maximum removal efficiency of 88.3% was achieved at a C<sub>o</sub> of 6 mg/L, adsorbent dose of 6 g/L, initial pH of 5.1, and a contact time of 90 min. Moreover, four consecutive adsorption/desorption cycles with the chemical agent of NaOH solution (0.1 mol/L) showed excellent reusability of the biosorbents. The adsorption isotherm fitted better to the Langmuir model and the kinetic data best accorded with the pseudo-second-order kinetic model for both biosorbents, expressing a monolayer chemisorption process with recorded maximum adsorption capacities of 1.14 and 1.50 mg/g for <i>Syzygium cumini</i> and <i>Psidium guajava</i>, respectively. Therefore, given their removal capacity and potential utility, the prepared biomass could be effective reusable biosorbents to treat water contaminated with fluoride.https://www.mdpi.com/2073-4441/14/23/3939fluoride removal<i>Syzygium cumini</i><i>Psidium guajava</i>biosorptionoptimization |
| spellingShingle | Malihe Qazi Hamze Ali Jamali Reza Darvishi Cheshmeh Soltani Mahmoud Nasr Adel Kamyab Rudsari Reza Ghanbari A Comparison Study on Defluoridation Capabilities Using <i>Syzygium cumini</i> and <i>Psidium guajava</i>: Process Optimization, Isotherm, Kinetic, Reusability Studies Water fluoride removal <i>Syzygium cumini</i> <i>Psidium guajava</i> biosorption optimization |
| title | A Comparison Study on Defluoridation Capabilities Using <i>Syzygium cumini</i> and <i>Psidium guajava</i>: Process Optimization, Isotherm, Kinetic, Reusability Studies |
| title_full | A Comparison Study on Defluoridation Capabilities Using <i>Syzygium cumini</i> and <i>Psidium guajava</i>: Process Optimization, Isotherm, Kinetic, Reusability Studies |
| title_fullStr | A Comparison Study on Defluoridation Capabilities Using <i>Syzygium cumini</i> and <i>Psidium guajava</i>: Process Optimization, Isotherm, Kinetic, Reusability Studies |
| title_full_unstemmed | A Comparison Study on Defluoridation Capabilities Using <i>Syzygium cumini</i> and <i>Psidium guajava</i>: Process Optimization, Isotherm, Kinetic, Reusability Studies |
| title_short | A Comparison Study on Defluoridation Capabilities Using <i>Syzygium cumini</i> and <i>Psidium guajava</i>: Process Optimization, Isotherm, Kinetic, Reusability Studies |
| title_sort | comparison study on defluoridation capabilities using i syzygium cumini i and i psidium guajava i process optimization isotherm kinetic reusability studies |
| topic | fluoride removal <i>Syzygium cumini</i> <i>Psidium guajava</i> biosorption optimization |
| url | https://www.mdpi.com/2073-4441/14/23/3939 |
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