Adsorption of methylene blue onto coconut (Cocos nucifera) leaf: optimization, isotherm and kinetic studies
Fallen coconut leaves (CLs) are agricultural wastes largely available in Malaysia.In this study, we utilized CLs as a low-cost adsorbent for adsorptive removal of methylene blue (MB), a cationic dye from aqueous solution.Response surface methodology was employed to investigate the effects of operat...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2016
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| Online Access: | https://repo.uum.edu.my/id/eprint/18316/1/DWT%2057%2019%202016%201556-1567.pdf |
| _version_ | 1825804017162256384 |
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| author | Jawad, Ali H. Abd Rashid, Ramlah Mahmuod, Roweda M.A. Mohd Ishak, Mohd Azlan Kasim, Nur Nasulhah Ismail, Khudzir |
| author_facet | Jawad, Ali H. Abd Rashid, Ramlah Mahmuod, Roweda M.A. Mohd Ishak, Mohd Azlan Kasim, Nur Nasulhah Ismail, Khudzir |
| author_sort | Jawad, Ali H. |
| collection | UUM |
| description | Fallen coconut leaves (CLs) are agricultural wastes largely available in Malaysia.In this
study, we utilized CLs as a low-cost adsorbent for adsorptive removal of methylene blue (MB), a cationic dye from aqueous solution.Response surface methodology was employed to investigate the effects of operational parameters on MB removal efficiency. The investigated variables included adsorbent dosage (0.5–1.5 g/L), initial MB concentration (10–50 mg/L), initial solution pH (4–10), and agitation time (5–45 min).The analysis of variance was incorporated to test the adequacy of the model.The highest MB removal efficiency was
achieved by simultaneous interactions between adsorbent dosage with pH, adsorbent dosage
with agitation time, and pH with agitation time. Other simultaneous interactions showed lower effects.The optimum adsorbent dosage, initial MB concentration, initial solution pH, and agitation time were 1.26 g/L, 19.01 mg/L, 8.65, and 5.00 min, respectively. Under optimal conditions, high removal efficiency for MB was observed as 86.38%, and the equilibrium adsorption isotherms and kinetics were investigated.The Langmuir, Freundlich, and Temkin models of adsorption were used to analyze the experimental data. Pseudo-first-order and pseudo-second-order models were also employed to analyze the kinetic data obtained at different MB initial concentrations.The adsorption kinetics closely followed the pseudo-secondorder model.Based on the Langmuir model, the maximum adsorption capacity of MB on the
CL surface was 112.35 mg/g at 27 ± 2˚C. |
| first_indexed | 2024-07-04T06:07:31Z |
| format | Article |
| id | uum-18316 |
| institution | Universiti Utara Malaysia |
| language | English |
| last_indexed | 2024-07-04T06:07:31Z |
| publishDate | 2016 |
| publisher | Taylor & Francis Group |
| record_format | eprints |
| spelling | uum-183162016-06-28T03:18:53Z https://repo.uum.edu.my/id/eprint/18316/ Adsorption of methylene blue onto coconut (Cocos nucifera) leaf: optimization, isotherm and kinetic studies Jawad, Ali H. Abd Rashid, Ramlah Mahmuod, Roweda M.A. Mohd Ishak, Mohd Azlan Kasim, Nur Nasulhah Ismail, Khudzir Q Science (General) Fallen coconut leaves (CLs) are agricultural wastes largely available in Malaysia.In this study, we utilized CLs as a low-cost adsorbent for adsorptive removal of methylene blue (MB), a cationic dye from aqueous solution.Response surface methodology was employed to investigate the effects of operational parameters on MB removal efficiency. The investigated variables included adsorbent dosage (0.5–1.5 g/L), initial MB concentration (10–50 mg/L), initial solution pH (4–10), and agitation time (5–45 min).The analysis of variance was incorporated to test the adequacy of the model.The highest MB removal efficiency was achieved by simultaneous interactions between adsorbent dosage with pH, adsorbent dosage with agitation time, and pH with agitation time. Other simultaneous interactions showed lower effects.The optimum adsorbent dosage, initial MB concentration, initial solution pH, and agitation time were 1.26 g/L, 19.01 mg/L, 8.65, and 5.00 min, respectively. Under optimal conditions, high removal efficiency for MB was observed as 86.38%, and the equilibrium adsorption isotherms and kinetics were investigated.The Langmuir, Freundlich, and Temkin models of adsorption were used to analyze the experimental data. Pseudo-first-order and pseudo-second-order models were also employed to analyze the kinetic data obtained at different MB initial concentrations.The adsorption kinetics closely followed the pseudo-secondorder model.Based on the Langmuir model, the maximum adsorption capacity of MB on the CL surface was 112.35 mg/g at 27 ± 2˚C. Taylor & Francis Group 2016 Article PeerReviewed application/pdf en https://repo.uum.edu.my/id/eprint/18316/1/DWT%2057%2019%202016%201556-1567.pdf Jawad, Ali H. and Abd Rashid, Ramlah and Mahmuod, Roweda M.A. and Mohd Ishak, Mohd Azlan and Kasim, Nur Nasulhah and Ismail, Khudzir (2016) Adsorption of methylene blue onto coconut (Cocos nucifera) leaf: optimization, isotherm and kinetic studies. Desalination and Water Treatment, 57 (19). pp. 8839-8853. ISSN 1944-3994 http://doi.org/10.1080/19443994.2015.1026282 doi:10.1080/19443994.2015.1026282 doi:10.1080/19443994.2015.1026282 |
| spellingShingle | Q Science (General) Jawad, Ali H. Abd Rashid, Ramlah Mahmuod, Roweda M.A. Mohd Ishak, Mohd Azlan Kasim, Nur Nasulhah Ismail, Khudzir Adsorption of methylene blue onto coconut (Cocos nucifera) leaf: optimization, isotherm and kinetic studies |
| title | Adsorption of methylene blue onto coconut (Cocos nucifera) leaf: optimization, isotherm and kinetic studies |
| title_full | Adsorption of methylene blue onto coconut (Cocos nucifera) leaf: optimization, isotherm and kinetic studies |
| title_fullStr | Adsorption of methylene blue onto coconut (Cocos nucifera) leaf: optimization, isotherm and kinetic studies |
| title_full_unstemmed | Adsorption of methylene blue onto coconut (Cocos nucifera) leaf: optimization, isotherm and kinetic studies |
| title_short | Adsorption of methylene blue onto coconut (Cocos nucifera) leaf: optimization, isotherm and kinetic studies |
| title_sort | adsorption of methylene blue onto coconut cocos nucifera leaf optimization isotherm and kinetic studies |
| topic | Q Science (General) |
| url | https://repo.uum.edu.my/id/eprint/18316/1/DWT%2057%2019%202016%201556-1567.pdf |
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