Banca de QUALIFICAÇÃO: TALITA LORENA DA SILVA DO NASCIMENTO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : TALITA LORENA DA SILVA DO NASCIMENTO
DATE: 09/07/2021
TIME: 10:30
LOCAL: Plataforma Google Meet
TITLE:

BIOADSORBENT DERIVED FROM THE AQUATIC PACHIRA Aubl.  FOR METALS REMOVING IN INDUSTRIAL EFFLUENTS

KEY WORDS:

adsorption, munguba, charcoal, metals

PAGES: 60
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:

The use of agro-industrial products to remove industrial contaminants through the adsorption process has been a sustainable alternative due to its renewable origin, reduction, low cost and efficiency. In this sense, the present study aimed to investigate the use of bioadsorbent derived from the fruit peel of aquatic Pachira for the removal of metallic ions in aqueous solution. The bioadsorbent was produced by carbonizing the biomass husk at 450 ° C, and taking advantage of the zeta, XRD and FRX potential. Then, to optimize the adsorption tests, a complete and central factorial design was planned in order to verify the influence of the concentration of Ni²⁺ and Cd²⁺ metal ions, adsorbent mass and temperature on the removal capacity of such ions. The adsorption tests were developed using batch and fixed bed column systems. The kinetic models of the targeted multielement solutions that occurred in a physiosorption process, as well as the isotherm models that best fit the experimental data were Freundlich for Ni²⁺ and Langmuir for Cd²⁺. Through the study of adsorption thermodynamics, it is observed that the system, for both ions, is endothermic, since the values of ΔH were positive, and that the adsorption conditions are favorable and spontaneous, indicated by the results of ΔG negative. The rupture curves that at a flow rate of 3mL/min and bed height of 12 cm there are better removal results, with the rupture time for the initial devices of 100 ppm Ni²⁺ and Cd²⁺ equal to 6 and 10 minutes, respectively . As a resource for adsorption of metals in the bed column determined the following order Cd²⁺ < Ni²⁺. The bioabsorbent produced from the fruit peel of the Aquatic Pachira has the potential to remove metals in industrial effluents, principally in batches, providing sustainable valorization of a forest by-product through its application in effluent treatment systems.

BANKING MEMBERS:
Interno - 6347420 - MARCUS ANTONIO DE FREITAS MELO
Externa ao Programa - 2668814 - MAGNA ANGELICA DOS SANTOS BEZERRA SOUSA
Externa à Instituição - KARINE FONSECA SOARES DE OLIVEIRA