Removal of Humic Substances from Aqueous Solutions Using Carbon Quantum Dots and Activated Carbon Derived by Watermelon Rind
Sustainable and green adsorbents for water and wastewater treatment have gained attention worldwide in the last decades. Water contaminated with humic substances (HSs) has become an emerging human health threat due to producing disinfection by-products (DBPs) which react with chlorine and result in...
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| Format: | Article |
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Iranian Environmental Mutagen Society
2024-11-01
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| Series: | Journal of Water and Environmental Nanotechnology |
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| Online Access: | https://www.jwent.net/article_718451_57bca10b056167b0e3a5e0005af27ecd.pdf |
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| author | Mohammad Pirbavepour Bahareh Lorestani Maryam Kiani Sadr Mehrdad Cheraghi Atefeh Chamani Fatemeh Houshmand |
| author_facet | Mohammad Pirbavepour Bahareh Lorestani Maryam Kiani Sadr Mehrdad Cheraghi Atefeh Chamani Fatemeh Houshmand |
| author_sort | Mohammad Pirbavepour |
| collection | DOAJ |
| description | Sustainable and green adsorbents for water and wastewater treatment have gained attention worldwide in the last decades. Water contaminated with humic substances (HSs) has become an emerging human health threat due to producing disinfection by-products (DBPs) which react with chlorine and result in carcinogenic materials such as THMs. This study was conducted to remove HSs from aqueous solutions using nano-scale biosorption based on watermelon rind (WR), as a cost-efficient adsorbent. The effects of factors such as time, adsorbent dosage, pH and concentration, and then reaction kinetics and isotherms on the adsorption process were investigated. FTIR, XRD, BET analysis SEM, and also TEM were used to evaluate the structural characteristics of the adsorbent. The characteristics showed that increasing the temperature of thermal oxidation and loading of NH4Cl on the adsorbent surface increases the porosity and surface area, leading to an increase in adsorption performance. Also, given effective factors that increase the time and dose of adsorbent and reduce the initial concentration, The removal efficiency of humic acid (HA) increased with the following conditions: time 45 min and pH=4 and the adsorbent equal to 0.1 gr/L at a concentration of 50 mg/L, the removal efficiency of HSs reached 93.89%. The experiments showed that the adsorption process showed a better match with the pseudo-quadratic synthetic model with a coefficient of determination R²=0.99, while the adsorption isotherm was consistent with the Langmuir adsorption model. Studies have shown that adsorption occurs in a single layer. The thermodynamic parameters show that the process is spontaneous. |
| format | Article |
| id | doaj-art-9c0dc3e075c34d8fb8f6c32dc273bc96 |
| institution | Kabale University |
| issn | 2476-7204 2476-6615 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Iranian Environmental Mutagen Society |
| record_format | Article |
| series | Journal of Water and Environmental Nanotechnology |
| spelling | doaj-art-9c0dc3e075c34d8fb8f6c32dc273bc962025-01-12T09:34:37ZengIranian Environmental Mutagen SocietyJournal of Water and Environmental Nanotechnology2476-72042476-66152024-11-019436738410.22090/jwent.2024.04.01718451Removal of Humic Substances from Aqueous Solutions Using Carbon Quantum Dots and Activated Carbon Derived by Watermelon RindMohammad Pirbavepour0Bahareh Lorestani1Maryam Kiani Sadr2Mehrdad Cheraghi3Atefeh Chamani4Fatemeh Houshmand5Ph.D. Student, Department of Water and Wastewater, Faculty of Engineering, Islamic Azad University, Hamedan branch, Hamedan, Iran.Associate Professor, Department of Environment, Faculty of Basic Sciences, Islamic Azad University, Hamedan Branch, Hamedan, Iran.Assistant Professor, Department of Environment, Faculty of Basic Sciences, Islamic Azad University, Hamedan Branch, Hamedan, Iran.Associate Professor, Department of Environment, Faculty of Basic Sciences, Islamic Azad University, Hamedan Branch, Hamedan, Iran.Associate Professor, Department of Environment, Waste and Effluent Research Center, Isfahan Branch(Khorasgan), Islamic Azad University, Isfahan, Iran.Assistant professor, Department of Industrial Chemistry engineering, Technical and Vocational University, Tehran, Iran.Sustainable and green adsorbents for water and wastewater treatment have gained attention worldwide in the last decades. Water contaminated with humic substances (HSs) has become an emerging human health threat due to producing disinfection by-products (DBPs) which react with chlorine and result in carcinogenic materials such as THMs. This study was conducted to remove HSs from aqueous solutions using nano-scale biosorption based on watermelon rind (WR), as a cost-efficient adsorbent. The effects of factors such as time, adsorbent dosage, pH and concentration, and then reaction kinetics and isotherms on the adsorption process were investigated. FTIR, XRD, BET analysis SEM, and also TEM were used to evaluate the structural characteristics of the adsorbent. The characteristics showed that increasing the temperature of thermal oxidation and loading of NH4Cl on the adsorbent surface increases the porosity and surface area, leading to an increase in adsorption performance. Also, given effective factors that increase the time and dose of adsorbent and reduce the initial concentration, The removal efficiency of humic acid (HA) increased with the following conditions: time 45 min and pH=4 and the adsorbent equal to 0.1 gr/L at a concentration of 50 mg/L, the removal efficiency of HSs reached 93.89%. The experiments showed that the adsorption process showed a better match with the pseudo-quadratic synthetic model with a coefficient of determination R²=0.99, while the adsorption isotherm was consistent with the Langmuir adsorption model. Studies have shown that adsorption occurs in a single layer. The thermodynamic parameters show that the process is spontaneous.https://www.jwent.net/article_718451_57bca10b056167b0e3a5e0005af27ecd.pdfadsorptionwatermelon rindnanomaterialhumic acidwater treatment |
| spellingShingle | Mohammad Pirbavepour Bahareh Lorestani Maryam Kiani Sadr Mehrdad Cheraghi Atefeh Chamani Fatemeh Houshmand Removal of Humic Substances from Aqueous Solutions Using Carbon Quantum Dots and Activated Carbon Derived by Watermelon Rind Journal of Water and Environmental Nanotechnology adsorption watermelon rind nanomaterial humic acid water treatment |
| title | Removal of Humic Substances from Aqueous Solutions Using Carbon Quantum Dots and Activated Carbon Derived by Watermelon Rind |
| title_full | Removal of Humic Substances from Aqueous Solutions Using Carbon Quantum Dots and Activated Carbon Derived by Watermelon Rind |
| title_fullStr | Removal of Humic Substances from Aqueous Solutions Using Carbon Quantum Dots and Activated Carbon Derived by Watermelon Rind |
| title_full_unstemmed | Removal of Humic Substances from Aqueous Solutions Using Carbon Quantum Dots and Activated Carbon Derived by Watermelon Rind |
| title_short | Removal of Humic Substances from Aqueous Solutions Using Carbon Quantum Dots and Activated Carbon Derived by Watermelon Rind |
| title_sort | removal of humic substances from aqueous solutions using carbon quantum dots and activated carbon derived by watermelon rind |
| topic | adsorption watermelon rind nanomaterial humic acid water treatment |
| url | https://www.jwent.net/article_718451_57bca10b056167b0e3a5e0005af27ecd.pdf |
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