Valuation of banana peel waste for producing activated carbon via NaOH and pyrolysis for methylene blue removal
| Autor: | Letícia D. Duizit, Fernanda R. Pinhatio, Daniella Regina Mulinari, Lana S. Maia |
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| Rok vydání: | 2021 |
| Předmět: |
Langmuir
Materials science Energy Engineering and Power Technology 02 engineering and technology 010402 general chemistry 01 natural sciences Inorganic Chemistry symbols.namesake chemistry.chemical_compound Adsorption Materials Chemistry medicine Freundlich equation Renewable Energy Sustainability and the Environment Process Chemistry and Technology Organic Chemistry Langmuir adsorption model Banana peel 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Ceramics and Composites symbols 0210 nano-technology Pyrolysis Methylene blue Activated carbon medicine.drug Nuclear chemistry |
| Zdroj: | Carbon Letters. |
| ISSN: | 2233-4998 1976-4251 |
| Popis: | The discharge of dye-containing industrial effluents such as methylene blue (MB) in water bodies has resulted in severe aquatic and human life problems. In addition to this factor, there is the accumulation of banana peel wastes, which can generate ecological damage. Thus, this research purpose a different method from the literature using the banana peel waste (BP) to produce activated carbon (ACBP) by NaOH activation followed by pyrolysis at 400 °C to remove methylene blue (MB). The material was characterized by TGA, XRD, SEM, BET, and FTIR. The influence of dye concentration (10, 25, 50, 100, 250, and 500 mg L−1) was investigated. ACBP presented a well-developed pore structure with a predominance of mesopores and macropores. This morphological structure directly influences the MB removal capacity. The highest efficiency for dye removal was in the MB initial concentration of 25 mg L−1, sorbent of 0.03 g, and contact time of 60 min, which were 99.8%. The adsorption isotherms were well defined by Langmuir, Freundlich, and Temkin isotherm models. The Langmuir model represented the best fit of experimental data for ACBP with a maximum adsorption capacity of 232.5 mg g−1. This adsorbent showed a comparatively high performance to some previous works. So, the banana peel waste is an efficient resource for producing activated carbon and the adsorption of methylene blue. |
| Databáze: | OpenAIRE |
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