Per: RIAN CRISTIAN DOURO AMORIM (UNIVERSIDADE FEDERAL DO PARá), Antônio Lucas Alcantara Modesto (universidade federal do Pará ), Alex Gabriel Oliveira Ruivo (universidade federal do Pará ), Ana Paula Souza de Souza (universidade federal do Pará), Diego Cardoso Estumano (universidade federal do Pará), Deibson Silva da Costa (universidade federal do Pará), emerson cardoso rodrigues (universidade federal do Pará)
Abstract:
The present work aimed to synthesize "4A" zeolites from kaolin waste and apply the synthesized product in ion exchange. For the synthesis of 4A zeolite, the waste was calcined at 700°C for two hours to transform it into metakaolin. After calcination, the metakaolin and NaOH solution were introduced into a synthesis system, regulated to a temperature of 100°C and a rotation speed of 700 RPM for 30 minutes. For ion exchange, the same synthesis system was used, at 100°C and 700 RPM, with 4A zeolite and CaCl2 solution for 8 hours. In the analytical procedure, the kaolin waste, metakaolin, and zeolites were subjected to scanning electron microscopy (SEM) and X-ray diffraction (XRD). The micrographs of the zeolites confirmed the presence of cubic morphology, which is characteristic of type A zeolites. The diffractograms, based on the consulted data sheets, confirmed the presence of zeolitic crystals, as observed in the SEM. Thus, kaolin waste proved to be a viable material for the formation of type A zeolitic crystals, which exhibit ion exchange properties, confirmed by the formation of 5A zeolites.