Comparative adsorption of methylene blue dye on hexane-washed and xanthated spent grated coconut (Cocos nucifera L.): isotherms, thermodynamics, and mechanisms
A batch system investigated the application of two types of chemically modified biosorbents derived from spent grated coconut (Cocos nucifera) powder to adsorb methylene blue (MB) from aqueous solutions. The biosorbents were characterised by spectroscopic and quantitative analyses. The assessment of...
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Politechnika Lubelska – Lublin University of Technology
2022
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| author | Khalid, Khadijah Megat Hanafiah, Megat Ahmad Kamal Al-Amrani, Waheeba A. Nik Malek, Nik Ahmad Nizam |
| author_facet | Khalid, Khadijah Megat Hanafiah, Megat Ahmad Kamal Al-Amrani, Waheeba A. Nik Malek, Nik Ahmad Nizam |
| author_sort | Khalid, Khadijah |
| collection | ePrints |
| description | A batch system investigated the application of two types of chemically modified biosorbents derived from spent grated coconut (Cocos nucifera) powder to adsorb methylene blue (MB) from aqueous solutions. The biosorbents were characterised by spectroscopic and quantitative analyses. The assessment of MB adsorption onto the investigated biosorbents was studied at different experimental conditions with different pHs (2-9) and different initial concentrations of MB (10-400 mg/L) at three different temperatures (298. 308, and 318 K). The maximum adsorption capacity (q(max)) of xanthated spent grated coconut (XSGC) was higher than that of hexane-washed spent grated coconut (HSGC). The thermodynamic study indicated that the MB adsorption process was spontaneous for both biosorbents. Desorption of MB-loaded biosorbents was carried out using HCl, NaOH, and Na(2)EDTA solutions. A desorption ratio of more than 90% was obtained over three adsorption/desorption cycles for HSGC. However, XSGC demonstrated poor MB desorption, implying a stronger MB interaction with XSGC, which could be attributed to H-bonding, Yoshida H-bonding, n-pi. and pi-pi bonding. The study showed that HSGC and XSGC could be applied as biosorbents to remove low MB concentrations from aqueous solutions. |
| first_indexed | 2024-03-05T21:26:29Z |
| format | Article |
| id | utm.eprints-103065 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T21:26:29Z |
| publishDate | 2022 |
| publisher | Politechnika Lubelska – Lublin University of Technology |
| record_format | dspace |
| spelling | utm.eprints-1030652023-10-12T09:15:57Z http://eprints.utm.my/103065/ Comparative adsorption of methylene blue dye on hexane-washed and xanthated spent grated coconut (Cocos nucifera L.): isotherms, thermodynamics, and mechanisms Khalid, Khadijah Megat Hanafiah, Megat Ahmad Kamal Al-Amrani, Waheeba A. Nik Malek, Nik Ahmad Nizam Q Science (General) A batch system investigated the application of two types of chemically modified biosorbents derived from spent grated coconut (Cocos nucifera) powder to adsorb methylene blue (MB) from aqueous solutions. The biosorbents were characterised by spectroscopic and quantitative analyses. The assessment of MB adsorption onto the investigated biosorbents was studied at different experimental conditions with different pHs (2-9) and different initial concentrations of MB (10-400 mg/L) at three different temperatures (298. 308, and 318 K). The maximum adsorption capacity (q(max)) of xanthated spent grated coconut (XSGC) was higher than that of hexane-washed spent grated coconut (HSGC). The thermodynamic study indicated that the MB adsorption process was spontaneous for both biosorbents. Desorption of MB-loaded biosorbents was carried out using HCl, NaOH, and Na(2)EDTA solutions. A desorption ratio of more than 90% was obtained over three adsorption/desorption cycles for HSGC. However, XSGC demonstrated poor MB desorption, implying a stronger MB interaction with XSGC, which could be attributed to H-bonding, Yoshida H-bonding, n-pi. and pi-pi bonding. The study showed that HSGC and XSGC could be applied as biosorbents to remove low MB concentrations from aqueous solutions. Politechnika Lubelska – Lublin University of Technology 2022 Article PeerReviewed Khalid, Khadijah and Megat Hanafiah, Megat Ahmad Kamal and Al-Amrani, Waheeba A. and Nik Malek, Nik Ahmad Nizam (2022) Comparative adsorption of methylene blue dye on hexane-washed and xanthated spent grated coconut (Cocos nucifera L.): isotherms, thermodynamics, and mechanisms. Journal of Ecological Engineering, 23 (3). pp. 1-11. ISSN 2299-8993 http://dx.doi.org/10.12911/22998993/145675 DOI: 10.12911/22998993/145675 |
| spellingShingle | Q Science (General) Khalid, Khadijah Megat Hanafiah, Megat Ahmad Kamal Al-Amrani, Waheeba A. Nik Malek, Nik Ahmad Nizam Comparative adsorption of methylene blue dye on hexane-washed and xanthated spent grated coconut (Cocos nucifera L.): isotherms, thermodynamics, and mechanisms |
| title | Comparative adsorption of methylene blue dye on hexane-washed and xanthated spent grated coconut (Cocos nucifera L.): isotherms, thermodynamics, and mechanisms |
| title_full | Comparative adsorption of methylene blue dye on hexane-washed and xanthated spent grated coconut (Cocos nucifera L.): isotherms, thermodynamics, and mechanisms |
| title_fullStr | Comparative adsorption of methylene blue dye on hexane-washed and xanthated spent grated coconut (Cocos nucifera L.): isotherms, thermodynamics, and mechanisms |
| title_full_unstemmed | Comparative adsorption of methylene blue dye on hexane-washed and xanthated spent grated coconut (Cocos nucifera L.): isotherms, thermodynamics, and mechanisms |
| title_short | Comparative adsorption of methylene blue dye on hexane-washed and xanthated spent grated coconut (Cocos nucifera L.): isotherms, thermodynamics, and mechanisms |
| title_sort | comparative adsorption of methylene blue dye on hexane washed and xanthated spent grated coconut cocos nucifera l isotherms thermodynamics and mechanisms |
| topic | Q Science (General) |
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