Uso do rejeito de caulim na adsorção de corantes alimentícios
This work presents an assessment of the adsorption performance of kaolin waste in solutions containing food dyes. For this purpose, the kaolin waste was obtained from an industry in Equador/RN. Subsequently, the kaolin waste was characterized through particle size analysis, XRF, XRD, SEM, and TGA. N...
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| Formato: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | Brasil |
| Recursos: | Universidade Federal do Rio Grande do Norte (UFRN) |
| Repositorio: | Repositório Institucional da UFRN |
| Idioma: | portugués |
| OAI Identifier: | oai:repositorio.ufrn.br:123456789/57160 |
| Acesso em linha: | https://repositorio.ufrn.br/handle/123456789/57160 |
| Access Level: | acceso abierto |
| Palavra-chave: | Rejeito de caulim Corantes alimentícios Adsorção CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA |
| Resumo: | This work presents an assessment of the adsorption performance of kaolin waste in solutions containing food dyes. For this purpose, the kaolin waste was obtained from an industry in Equador/RN. Subsequently, the kaolin waste was characterized through particle size analysis, XRF, XRD, SEM, and TGA. Next, the ratio of 10 g of kaolin waste to 3 ml of water was used to manufacture the pellets, which were then calcined at 800°C for 2 hours with a heating rate of 10°C/min. These pellets were characterized in XRD, SEM, and tested for their resistance in a solution. After characterization, batch and column tests were conducted in a system constructed using simple laboratory materials like a graduated cylinder, PET bottle, and faucets. Thus, characterization analyses revealed that the primary mineral in the waste is kaolinite. In batch tests with calcined kaolin powder, the test that exhibited the best adsorption capacity was with Tartrazine Yellow, at a value of 0.3658 mg/g. However, in column tests, it was observed that the use of calcined pellets was necessary due to their resilience for this operation. Thus, in batch tests with calcined pellets, the one that exhibited the best adsorption capacity was with Tartrazine Yellow, at a value of 0.2023 mg/g. In comparison to the dyes, it was observed that Tartrazine Yellow exhibited a better affinity for removal with the kaolin waste. During the column adsorption tests, it was noted that the effluent flow rate is an important factor in the process. Finally, it is considered that each process has its advantages, and conducting more column tests with constant flow and recycling may yield additional complementary results. |
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