Cassava (Manihot esculenta Crantz) stump biochar: Physical/chemical characteristics and dye affinity
| Autor: | R. P. S. Godoy, Marcelino Luis Gimenes, Lucas Meili, Livia M. O. Ribeiro, João Inácio Soletti, Sandra Carvalho, Meuris Gurgel Carlos Da Silva, Melissa Gurgel Adeodato Vieira |
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| Rok vydání: | 2018 |
| Předmět: |
Thermogravimetric analysis
General Chemical Engineering Biomass 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Alizarin Acid fuchsin chemistry.chemical_compound Adsorption 020401 chemical engineering chemistry Biochar 0204 chemical engineering 0210 nano-technology Pyrolysis Methylene blue Nuclear chemistry |
| Zdroj: | Chemical Engineering Communications. 206:829-841 |
| ISSN: | 1563-5201 0098-6445 |
| DOI: | 10.1080/00986445.2018.1530991 |
| Popis: | Aiming investigated the pyrolysis of the agricultural waste known as cassava stump, the portion of the plant to which the tuberous roots and aerial parts of the plant are attached, this study had as objective to produce biochars from cassava stump by conducting vacuum pyrolysis at 400, 500, or 600 °C. The biochars were characterized by proximate analysis, thermogravimetric analysis, Fourier-transform infrared absorption spectroscopy, X-ray diffraction, scanning electron microscopy, and nitrogen adsorption. Adsorption affinity tests were performed with four different dyes: methylene blue, basic fuchsin, acid fuchsin, and alizarin. Biochar obtained at 500 °C, heating rate of 20 °C.min−1, and 90 min of residence at the final temperature, had 22% higher fixed carbon content as compared to the other biochars and 3.16 times greater fixed carbon content than the original cassava stump. This biochar showed the best adsorption capacity (0.0679 mmol/g) and percentage of removal (87.6%) of methylene blue dye... |
| Databáze: | OpenAIRE |
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