2.1. Raw materials. The kaolin (K) waste was purchased from the Rio Capim mine (Pará-Brazil) and mechanically separated with a 40 mesh sieve. Part of the kaolin was thermally treated at 600 °C for 2 h to generate the metakaolinite (MK) reactive phase that was also used for the synthesis of zeolites (Allahdin et al., 2022), (Otieno et al., 2019).In order to evaluate its use …