Adsorption studies of KOH-modified hydrochar derived from sugarcane bagasse for dye removal: Kinetic, isotherm, and thermodynamic study
Toxicity of methylene blue (MB) in water bodies has a negative effect on environment and living organisms. The presence of MB in water could last longer in view of the non-biodegradable characteristic. In this study, hydrochar was used as adsorbent to remove MB from aqueous solution. Hydrochar deriv...
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| Format: | Article |
| Language: | English |
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Komunitas Ilmuwan dan Profesional Muslim Indonesia
2022-07-01
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| Series: | Communications in Science and Technology |
| Subjects: | |
| Online Access: | https://cst.kipmi.or.id/journal/article/view/669 |
| _version_ | 1828430026150772736 |
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| author | Dwi Indah Lestari Ahmad Tawfiequrrahman Yuliansyah Arief Budiman |
| author_facet | Dwi Indah Lestari Ahmad Tawfiequrrahman Yuliansyah Arief Budiman |
| author_sort | Dwi Indah Lestari |
| collection | DOAJ |
| description | Toxicity of methylene blue (MB) in water bodies has a negative effect on environment and living organisms. The presence of MB in water could last longer in view of the non-biodegradable characteristic. In this study, hydrochar was used as adsorbent to remove MB from aqueous solution. Hydrochar derived from bagasse was successfully prepared by hydrothermal carbonization treatment at temperature of 270oC, and pressure of 10 Bar for 30 minutes. For enhancing the adsorption ability, hydrochar was activated by adding KOH that was able to increase the percent removal by ~11%. The hydrochar was characterized using FTIR before and after adsorption. The results showed that the dominant functional groups of hydrochar included O-H, C=O, -O- and aromatic compounds. Whereas, the functional group of azo groups such as N-H and N=N appeared after adsorption. The maximum adsorption capacity (Qmax) was 5.1204 mg/g, while the adsorption isotherm of MB onto hydrochar followed the Langmuir and Freundlich model. The adsorption mechanism belongs to chemical adsorption, and the rate of diffusion can be neglected because the adsorption kinetics fitted well with pseudo-second order and the value of k2 > kdif > k1. Thermodynamic studies indicated that the adsorption process is classified as endothermic and reversible at room temperature. The results showed that hydrochar could be the alternative adsorbent for removing MB in wastewater. In addition, sugarcane bagasse has a great potential as feedstock of hydrochar. |
| first_indexed | 2024-12-10T17:41:44Z |
| format | Article |
| id | doaj.art-bd2079d8c23a4ac99df6d2573252b428 |
| institution | Directory Open Access Journal |
| issn | 2502-9258 2502-9266 |
| language | English |
| last_indexed | 2024-12-10T17:41:44Z |
| publishDate | 2022-07-01 |
| publisher | Komunitas Ilmuwan dan Profesional Muslim Indonesia |
| record_format | Article |
| series | Communications in Science and Technology |
| spelling | doaj.art-bd2079d8c23a4ac99df6d2573252b4282022-12-22T01:39:21ZengKomunitas Ilmuwan dan Profesional Muslim IndonesiaCommunications in Science and Technology2502-92582502-92662022-07-0171152210.21924/cst.7.1.2022.669669Adsorption studies of KOH-modified hydrochar derived from sugarcane bagasse for dye removal: Kinetic, isotherm, and thermodynamic studyDwi Indah Lestari0Ahmad Tawfiequrrahman Yuliansyah1Arief Budiman2Universitas Gadjah Mada, Yogyakarta, IndonesiaUniversitas Gadjah Mada, Yogyakarta, IndonesiaUniversitas Gadjah Mada, Yogyakarta, IndonesiaToxicity of methylene blue (MB) in water bodies has a negative effect on environment and living organisms. The presence of MB in water could last longer in view of the non-biodegradable characteristic. In this study, hydrochar was used as adsorbent to remove MB from aqueous solution. Hydrochar derived from bagasse was successfully prepared by hydrothermal carbonization treatment at temperature of 270oC, and pressure of 10 Bar for 30 minutes. For enhancing the adsorption ability, hydrochar was activated by adding KOH that was able to increase the percent removal by ~11%. The hydrochar was characterized using FTIR before and after adsorption. The results showed that the dominant functional groups of hydrochar included O-H, C=O, -O- and aromatic compounds. Whereas, the functional group of azo groups such as N-H and N=N appeared after adsorption. The maximum adsorption capacity (Qmax) was 5.1204 mg/g, while the adsorption isotherm of MB onto hydrochar followed the Langmuir and Freundlich model. The adsorption mechanism belongs to chemical adsorption, and the rate of diffusion can be neglected because the adsorption kinetics fitted well with pseudo-second order and the value of k2 > kdif > k1. Thermodynamic studies indicated that the adsorption process is classified as endothermic and reversible at room temperature. The results showed that hydrochar could be the alternative adsorbent for removing MB in wastewater. In addition, sugarcane bagasse has a great potential as feedstock of hydrochar.https://cst.kipmi.or.id/journal/article/view/669hydrocharhydrothermal carbonizationadsorptionmethylene bluesugarcane bagasse |
| spellingShingle | Dwi Indah Lestari Ahmad Tawfiequrrahman Yuliansyah Arief Budiman Adsorption studies of KOH-modified hydrochar derived from sugarcane bagasse for dye removal: Kinetic, isotherm, and thermodynamic study Communications in Science and Technology hydrochar hydrothermal carbonization adsorption methylene blue sugarcane bagasse |
| title | Adsorption studies of KOH-modified hydrochar derived from sugarcane bagasse for dye removal: Kinetic, isotherm, and thermodynamic study |
| title_full | Adsorption studies of KOH-modified hydrochar derived from sugarcane bagasse for dye removal: Kinetic, isotherm, and thermodynamic study |
| title_fullStr | Adsorption studies of KOH-modified hydrochar derived from sugarcane bagasse for dye removal: Kinetic, isotherm, and thermodynamic study |
| title_full_unstemmed | Adsorption studies of KOH-modified hydrochar derived from sugarcane bagasse for dye removal: Kinetic, isotherm, and thermodynamic study |
| title_short | Adsorption studies of KOH-modified hydrochar derived from sugarcane bagasse for dye removal: Kinetic, isotherm, and thermodynamic study |
| title_sort | adsorption studies of koh modified hydrochar derived from sugarcane bagasse for dye removal kinetic isotherm and thermodynamic study |
| topic | hydrochar hydrothermal carbonization adsorption methylene blue sugarcane bagasse |
| url | https://cst.kipmi.or.id/journal/article/view/669 |
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