Malachite green and methylene blue dye removal using modified bagasse fly ash: Adsorption optimization studies

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dc.contributor.authorMeskel, Azeb Gebre
dc.contributor.authorKwikima, Muhajir Mussa
dc.contributor.authorMeshesha, Beteley Tekola
dc.contributor.authorHabtu, Nigus Gabbiye
dc.contributor.authorNaik, S.V. Chinna Swami
dc.contributor.authorVellanki, Bhanu Prakash
dc.date.accessioned2024-08-19T11:57:09Z
dc.date.available2024-08-19T11:57:09Z
dc.date.issued2024
dc.descriptionFull text. Available at https://doi.org/10.1016/j.envc.2023.100829
dc.description.abstractUtilizing 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.
dc.identifier.citationMeskel, A. G., Kwikima, M. M., Meshesha, B. T., Habtu, N. G., Naik, S. C. S., & Vellanki, B. P. (2024). Malachite green and methylene blue dye removal using modified bagasse fly ash: Adsorption optimization studies. Environmental Challenges, 14, 100829.
dc.identifier.doi10.1016/j.envc.2023.100829
dc.identifier.otherDOI: 10.1016/j.envc.2023.100829
dc.identifier.urihttps://repository.udom.ac.tz/handle/20.500.12661/4821
dc.language.isoen
dc.publisherElsevier BV
dc.relation.ispartofEnvironmental Challenges
dc.subjectAdsorption modeling
dc.subjectMethylene blue dye
dc.subjectMalachite green dye
dc.subjectOptimization
dc.subjectTextile wastewater
dc.titleMalachite green and methylene blue dye removal using modified bagasse fly ash: Adsorption optimization studies
dc.typeArticle
oaire.citation.volume14
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