LAUSR

ABSTRACT The aim of the present work was to evaluate the adsorption behaviour of tartrazine yellow dye using Moringa oleifera (moringa) seeds in a fixed bed, through the variation of operational parameters and evaluation of mathematical models. The results showed that the biosorption process showed higher efficiency when the column was operated at 1 mL min−1 flow, with a height of 14 cm and pH 5 of the dye solution, which had a removal percentage of 44.89% and removal capacity of 0.504 mg g −1. When the adsorption models were applied, it was found that the Adams–Bohart model best represents the initial part of the rupture curve, whereas the Dose-Response model best reproduces the entire rupture curve. The regeneration experiments demonstrate that it is possible to regenerate the biosorbent and its removal capacity remains at approximately 33% from the 4th cycle, satisfactory results for the reuse of the moringa seeds in the removal of tartrazine dye.