Brilliant Green (BG) dyes onto hydroxyapatite (HAP) produced from pirarucu (Arapaima
gigas) scales was investigated by Fourier Transform Infrared (FTIR), Central Composite
Design (CCD), and Density Functional Theory (DFT). Pirarucu scales were chosen as the
precursor of the bioadsorbent owing to the large volume of this unutilized waste produced by
the Brazilian pisciculture, which has increased the concern about solid disposal in the …