Produção de carvão ativado a partir de casca de arroz

• Main Authors: Amanda da Silva Reis, Niléia Cristina Silva, Ulbado Martins Neves
• Format: Article
• Language: English
• Published: Universidade Federal do Tocantins 2016-12-01
• Series: Desafios
• Subjects: Activated carbon; Rice husk; Methyl parathion; Phosphoric acid (H3PO4).
• Online Access: https://sistemas.uft.edu.br/periodicos/index.php/desafios/article/view/1551/8345

The rice husk, one of the most abundant agricultural wastes in our country, is a fibrous material with a high silica content (SiO2). The use of rice husk as raw material for activated carbon production is a new project and its use is due to the adequacy of its basic characteristics (non-grafitizável, high fixed carbon content) for this purpose. This study aimed to make charcoal activated from the rice husk. After rice husk being properly treated was charred to 600th C for 40 minutes in a muffle furnace. The activating agent used in the chemical activation of the material was Phosphoric Acid (H3PO4) concentrate (85%). The tests were: pH of zero charge, chromatographic methods (pesticides adsorption), AC test as adsorbent pesticides, FTIR analysis, scanning electron microscopy SEM. For determining the pHpcz, the point of intersection of the curve is at 6.4, that is, shows that the activated carbon from rice husk is slightly acidic. The chromatographic method (adsorption using HPLC) showed that the activated carbon rice hull was more efficient removal of methyl parathion pesticidal solution (83.78%), which in the removal of 2,4 pesticide D (21.61%) .