POTENTIAL OF EUCALYPTUS OIL EXTRACTION WASTE ON COPPER(II) ADSORPTION

Authors

DOI:

https://doi.org/10.20873/v2n1_2023_6

Abstract

The objective of this work was to evaluate the potential of the residues from the eucalyptus oil extraction in the adsorption of copper (Cu). FTIR and TGA analyzes showed that biomass is a typical lignocellulosic material. The adsorption capacity of Cu(II) increased toward higher pH values, demonstrating that electrostatic attraction is an important process controlling adsorption. Adsorption reached equilibrium in 60 min of contact time with a rate of 0.338 g.mg−1 min−1, according to the pseudo-second order model. The equilibrium adsorption fit best to the Langmuir model with a maximum adsorption capacity of 45.05 mg.g-1 at 25ºC. The Dubinin-Radushkevich model showed that the adsorption process is physical in nature due to its low adsorption free energy (E) of 0.3469 kJ.mol-1. The agro-industrial waste evaluated herein has a high potential to be used as an adsorbent for Cu(II) and, probably, for other bivalent metals present in contaminated and wastewater, due to its high adsorption capacity and simple pre-treatment procedure.

Published

2023-08-31

How to Cite

Marreiros da Silva, H. N., Nepomuceno Patriota, S., Francisco, W. ., & Santos Mulholland, D. (2023). POTENTIAL OF EUCALYPTUS OIL EXTRACTION WASTE ON COPPER(II) ADSORPTION. DESAFIOS - Revista Interdisciplinar Da Universidade Federal Do Tocantins, 10(2). https://doi.org/10.20873/v2n1_2023_6