Adsorption Kinetics of Methyl Orange from Model Polluted Water onto N-Doped Activated Carbons Prepared from N-Containing Polymers
This study aimed to assess the role of polymeric sources (polypyrrole, polyaniline, and their copolymer) of nitrogen (N)-doped activated carbons (indexed as PAnAC, PPyAC, and PnyAC, respectively) on their adsorption efficiency to remove methyl orange (MO) as a model cationic dye. The adsorbents were...
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| Format: | Article |
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MDPI AG
2023-04-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/9/1983 |
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| author | Abdel-Basit Al-Odayni Faisal S. Alsubaie Naaser A. Y. Abdu Haifa Masfeer Al-Kahtani Waseem Sharaf Saeed |
| author_facet | Abdel-Basit Al-Odayni Faisal S. Alsubaie Naaser A. Y. Abdu Haifa Masfeer Al-Kahtani Waseem Sharaf Saeed |
| author_sort | Abdel-Basit Al-Odayni |
| collection | DOAJ |
| description | This study aimed to assess the role of polymeric sources (polypyrrole, polyaniline, and their copolymer) of nitrogen (N)-doped activated carbons (indexed as PAnAC, PPyAC, and PnyAC, respectively) on their adsorption efficiency to remove methyl orange (MO) as a model cationic dye. The adsorbents were characterized using FTIR, SEM, TGA, elemental analysis, and surface area. The kinetic experiments were performed in batches at different MO concentrations (<i>C</i><sub>0</sub>) and adsorbent dosages. The adsorption kinetic profiles of pseudo-first-order, pseudo-second-order (PSO), Elovich, intraparticle diffusion, and liquid film diffusion models were compared. The results showed a better fit to the PSO model, suggesting a chemisorption process. The adsorption capacity (<i>q</i><sub>e</sub>, mg/g) was found to have increased as MO <i>C</i><sub>0</sub> increased, yet decreased as the adsorbent quantity increased. At the adsorption operating condition, including MO <i>C</i><sub>0</sub> (200 ppm) and adsorbent dose (40 mg), the calculated <i>q</i><sub>e</sub> values were in the order of PAnAC (405 mg/g) > PPyAC (204 mg/g) > PnyAC (182 mg/g). This trend proved the carbon precursor’s importance in the final properties of the intended carbons; elemental analysis confirmed that the more nitrogen atoms are in the activated carbon, the greater the number of active sites in the adsorbent for accommodating adsorbates. The diffusion mechanism also assumed a rate-limiting step controlled by the film and intraparticle diffusion. Therefore, such an efficient performance may support the target route’s usefulness in converting nitrogenous-species waste into valuable materials. |
| first_indexed | 2024-03-11T04:09:34Z |
| format | Article |
| id | doaj.art-df7eeb21883346fea3c033eeb92f8647 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T04:09:34Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-df7eeb21883346fea3c033eeb92f86472023-11-17T23:33:36ZengMDPI AGPolymers2073-43602023-04-01159198310.3390/polym15091983Adsorption Kinetics of Methyl Orange from Model Polluted Water onto N-Doped Activated Carbons Prepared from N-Containing PolymersAbdel-Basit Al-Odayni0Faisal S. Alsubaie1Naaser A. Y. Abdu2Haifa Masfeer Al-Kahtani3Waseem Sharaf Saeed4Engineer Abdullah Bugshan Research Chair for Dental and Oral Rehabilitation, College of Dentistry, King Saud University, Riyadh 11545, Saudi ArabiaDepartment of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaDepartment of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaEngineer Abdullah Bugshan Research Chair for Dental and Oral Rehabilitation, College of Dentistry, King Saud University, Riyadh 11545, Saudi ArabiaThis study aimed to assess the role of polymeric sources (polypyrrole, polyaniline, and their copolymer) of nitrogen (N)-doped activated carbons (indexed as PAnAC, PPyAC, and PnyAC, respectively) on their adsorption efficiency to remove methyl orange (MO) as a model cationic dye. The adsorbents were characterized using FTIR, SEM, TGA, elemental analysis, and surface area. The kinetic experiments were performed in batches at different MO concentrations (<i>C</i><sub>0</sub>) and adsorbent dosages. The adsorption kinetic profiles of pseudo-first-order, pseudo-second-order (PSO), Elovich, intraparticle diffusion, and liquid film diffusion models were compared. The results showed a better fit to the PSO model, suggesting a chemisorption process. The adsorption capacity (<i>q</i><sub>e</sub>, mg/g) was found to have increased as MO <i>C</i><sub>0</sub> increased, yet decreased as the adsorbent quantity increased. At the adsorption operating condition, including MO <i>C</i><sub>0</sub> (200 ppm) and adsorbent dose (40 mg), the calculated <i>q</i><sub>e</sub> values were in the order of PAnAC (405 mg/g) > PPyAC (204 mg/g) > PnyAC (182 mg/g). This trend proved the carbon precursor’s importance in the final properties of the intended carbons; elemental analysis confirmed that the more nitrogen atoms are in the activated carbon, the greater the number of active sites in the adsorbent for accommodating adsorbates. The diffusion mechanism also assumed a rate-limiting step controlled by the film and intraparticle diffusion. Therefore, such an efficient performance may support the target route’s usefulness in converting nitrogenous-species waste into valuable materials.https://www.mdpi.com/2073-4360/15/9/1983polypyrrolepolyanilinenitrogen-containing polymersactivated carbonadsorption kineticwater treatment |
| spellingShingle | Abdel-Basit Al-Odayni Faisal S. Alsubaie Naaser A. Y. Abdu Haifa Masfeer Al-Kahtani Waseem Sharaf Saeed Adsorption Kinetics of Methyl Orange from Model Polluted Water onto N-Doped Activated Carbons Prepared from N-Containing Polymers Polymers polypyrrole polyaniline nitrogen-containing polymers activated carbon adsorption kinetic water treatment |
| title | Adsorption Kinetics of Methyl Orange from Model Polluted Water onto N-Doped Activated Carbons Prepared from N-Containing Polymers |
| title_full | Adsorption Kinetics of Methyl Orange from Model Polluted Water onto N-Doped Activated Carbons Prepared from N-Containing Polymers |
| title_fullStr | Adsorption Kinetics of Methyl Orange from Model Polluted Water onto N-Doped Activated Carbons Prepared from N-Containing Polymers |
| title_full_unstemmed | Adsorption Kinetics of Methyl Orange from Model Polluted Water onto N-Doped Activated Carbons Prepared from N-Containing Polymers |
| title_short | Adsorption Kinetics of Methyl Orange from Model Polluted Water onto N-Doped Activated Carbons Prepared from N-Containing Polymers |
| title_sort | adsorption kinetics of methyl orange from model polluted water onto n doped activated carbons prepared from n containing polymers |
| topic | polypyrrole polyaniline nitrogen-containing polymers activated carbon adsorption kinetic water treatment |
| url | https://www.mdpi.com/2073-4360/15/9/1983 |
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