SÍNTESE HIDROTERMAL POR FUSÃO ALCALINA DE ZEÓLITA NA-P1 DE REJEITOS DE CAULIM DA AMAZÔNIA E SUA APLICAÇÃO NA RETENÇÃO DE AZUL DE METILENO.

The use of waste from the mineral industry to obtain materials of technological importance has intensified in the last two decades, with the aim of reducing the environmental impact generated by them and adding value to an unwanted product. In the case of kaolin tailings from the Amazon, it is already being used for the production of zeolites. In this study, the results of the synthesis and characterization of P1-type zeolite and its application as an adsorbent for methylene blue dye are presented. Obtaining zeolite P1 was monitored by X-ray diffractometry, infrared and Raman spectroscopy, thermal analysis and scanning electron microscopy. The results showed that the zeolite was obtained without impurities, high degree of crystallinity, thermal stability above 300° C and very distinct and defined morphology. It was able to adsorb up to 90% dye. Showing that kaolin waste can be transformed into utility products.. [ABSTRACT FROM AUTHOR]