Malachite green and methylene blue dye removal using modified bagasse fly ash: Adsorption optimization studies
Utilizing Bagasse Fly Ash (BFA) as an adsorbent, a byproduct from the sugar industry, proved effective in removing a mixture of Malachite Green and Methylene Blue dyes from aqueous solutions. To enhance its efficacy, the fly ash underwent chemical modification and underwent detailed characterization...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Environmental Challenges |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S266701002300152X |
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| author | Azeb Gebre Meskel Muhajir Mussa Kwikima Beteley Tekola Meshesha Nigus Gabbiye Habtu S.V. Chinna Swami Naik Bhanu Prakash Vellanki |
| author_facet | Azeb Gebre Meskel Muhajir Mussa Kwikima Beteley Tekola Meshesha Nigus Gabbiye Habtu S.V. Chinna Swami Naik Bhanu Prakash Vellanki |
| author_sort | Azeb Gebre Meskel |
| collection | DOAJ |
| description | Utilizing Bagasse Fly Ash (BFA) as an adsorbent, a byproduct from the sugar industry, proved effective in removing a mixture of Malachite Green and Methylene Blue dyes from aqueous solutions. To enhance its efficacy, the fly ash underwent chemical modification and underwent detailed characterization using FTIR, XRD, SEM, and TGA analyses. Subsequently, adsorption studies were conducted to optimize critical parameters—initial dye concentration, contact time, and pH levels—employing a Mixed-Level Factorial design to pinpoint the most favorable conditions for efficient dye removal. The modified Bagasse Fly Ash (BFA) resulted in a maximum adsorption capacity of 18.75 mg/g (71.5 %) for Malachite Green and 15.5 mg/g (67.2 %) for Methylene Blue at initial dye concentration of 100 mg/L, pH of 9.6, and time of 51.5 min. Analysis of the sorption data involved rigorous application of both Langmuir and Freundlich isotherm models, revealing a strong fit of the linear representation to the data for both dyes. Specifically, R2 values of 0.97 and 0.93 were observed for Malachite Green, while notably higher values of 0.99 and 0.96 were obtained for Methylene Blue, affirming an excellent model-data agreement. Additionally, a kinetic study revealed that the dye adsorption process (MB and MG) followed the pseudo-second-order kinetic model (R2 > 0.99), indicating that chemisorption as dominant adsorption mechanism and providing valuable insights into the dynamic behavior of the process. |
| first_indexed | 2024-03-07T20:04:24Z |
| format | Article |
| id | doaj.art-b752ea6efb3c46059e35cfd5e88ed169 |
| institution | Directory Open Access Journal |
| issn | 2667-0100 |
| language | English |
| last_indexed | 2024-03-07T20:04:24Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environmental Challenges |
| spelling | doaj.art-b752ea6efb3c46059e35cfd5e88ed1692024-02-28T05:14:24ZengElsevierEnvironmental Challenges2667-01002024-01-0114100829Malachite green and methylene blue dye removal using modified bagasse fly ash: Adsorption optimization studiesAzeb Gebre Meskel0Muhajir Mussa Kwikima1Beteley Tekola Meshesha2Nigus Gabbiye Habtu3S.V. Chinna Swami Naik4Bhanu Prakash Vellanki5School of Chemical and Bio Engineering, Addis Ababa institute of Technology, Addis Ababa, P.O. Box 1176, EthiopiaAfrica Center of Excellence for Water Management, Addis Ababa University, Addis Ababa, P.O. Box 1176, Ethiopia; Department of Environmental Engineering and Management, College of Earth Sciences and Engineering, The University of Dodoma, P.O. Box 11090, Dodoma, TanzaniaSchool of Chemical and Bio Engineering, Addis Ababa institute of Technology, Addis Ababa, P.O. Box 1176, Ethiopia; Africa Center of Excellence for Water Management, Addis Ababa University, Addis Ababa, P.O. Box 1176, Ethiopia; Corresponding author.Faculty of Chemical and Food Engineering, Bahirdar Institute of technology, P.O. Box 26, Bahir Dar UniversityDepartment of Civil Engineering, Indian Institute of Technology Roorkee, 247667, IndiaDepartment of Civil Engineering, Indian Institute of Technology Roorkee, 247667, IndiaUtilizing Bagasse Fly Ash (BFA) as an adsorbent, a byproduct from the sugar industry, proved effective in removing a mixture of Malachite Green and Methylene Blue dyes from aqueous solutions. To enhance its efficacy, the fly ash underwent chemical modification and underwent detailed characterization using FTIR, XRD, SEM, and TGA analyses. Subsequently, adsorption studies were conducted to optimize critical parameters—initial dye concentration, contact time, and pH levels—employing a Mixed-Level Factorial design to pinpoint the most favorable conditions for efficient dye removal. The modified Bagasse Fly Ash (BFA) resulted in a maximum adsorption capacity of 18.75 mg/g (71.5 %) for Malachite Green and 15.5 mg/g (67.2 %) for Methylene Blue at initial dye concentration of 100 mg/L, pH of 9.6, and time of 51.5 min. Analysis of the sorption data involved rigorous application of both Langmuir and Freundlich isotherm models, revealing a strong fit of the linear representation to the data for both dyes. Specifically, R2 values of 0.97 and 0.93 were observed for Malachite Green, while notably higher values of 0.99 and 0.96 were obtained for Methylene Blue, affirming an excellent model-data agreement. Additionally, a kinetic study revealed that the dye adsorption process (MB and MG) followed the pseudo-second-order kinetic model (R2 > 0.99), indicating that chemisorption as dominant adsorption mechanism and providing valuable insights into the dynamic behavior of the process.http://www.sciencedirect.com/science/article/pii/S266701002300152XAdsorption modelingBagasse fly ashMethylene blue dyeMalachite green dyeOptimizationTextile wastewater |
| spellingShingle | Azeb Gebre Meskel Muhajir Mussa Kwikima Beteley Tekola Meshesha Nigus Gabbiye Habtu S.V. Chinna Swami Naik Bhanu Prakash Vellanki Malachite green and methylene blue dye removal using modified bagasse fly ash: Adsorption optimization studies Environmental Challenges Adsorption modeling Bagasse fly ash Methylene blue dye Malachite green dye Optimization Textile wastewater |
| title | Malachite green and methylene blue dye removal using modified bagasse fly ash: Adsorption optimization studies |
| title_full | Malachite green and methylene blue dye removal using modified bagasse fly ash: Adsorption optimization studies |
| title_fullStr | Malachite green and methylene blue dye removal using modified bagasse fly ash: Adsorption optimization studies |
| title_full_unstemmed | Malachite green and methylene blue dye removal using modified bagasse fly ash: Adsorption optimization studies |
| title_short | Malachite green and methylene blue dye removal using modified bagasse fly ash: Adsorption optimization studies |
| title_sort | malachite green and methylene blue dye removal using modified bagasse fly ash adsorption optimization studies |
| topic | Adsorption modeling Bagasse fly ash Methylene blue dye Malachite green dye Optimization Textile wastewater |
| url | http://www.sciencedirect.com/science/article/pii/S266701002300152X |
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