Banca de QUALIFICAÇÃO: LUIZ EDUARDO FREITAS DE MOURA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : LUIZ EDUARDO FREITAS DE MOURA
DATE: 20/02/2025
TIME: 10:00
LOCAL: Remoto
TITLE:

REMOVAL OF MULTI DYES FROM THE TEXTILE INDUSTRY USING MODIFIED BIOCARBON ASH.

KEY WORDS:

Adsorption, Modified ash, Textile dye, Batch, Fixed bed. Models.

PAGES: 73
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Processos Industriais de Engenharia Química
SPECIALTY: Processos Orgânicos
SUMMARY:

The expansion and industrial growth in the world have contributed to the formation of new categories of organic pollutants, such as pesticides, hygiene products, surfactants, pharmaceuticals and dyes. These pollutants are regularly found in aquatic environments, through the disposal of industrial effluents, promoting toxicity to the environment and the species that inhabit there. Industrial dyes have in their composition different organic groups such as: “azo and anthraquinones”, these groups are toxic to living beings, some being, therefore, carcinogenic upon prolonged exposure. Thus, this work proposes the production of biochar ash originated from the pyrolysis process of elephant grass and aveloz, as well as mordenite, to be used as an adsorbent for individual dyes of the Bezaktive red, yellow and blue S-matrix-150 type, as well as in mixtures between them. These adsorbents will be modified by acidic (HCl or H3PO4), basic (NaOH) and surfactant agents (hexadecyltrimethylammonium bromide), followed by characterization. The adsorption process will occur in batch and fixed bed. For the batch process, the following variables will be studied: mass and nature of the adsorbent, dye concentration, pH, temperature and adsorption time. In the treatment of the results, the adsorption isotherms related to the Langmuir and Freundlich models will be obtained, the pseudo 1st and 2nd order kinetics will be verified and finally, the controlling mechanism will be identified using the Weber-Morris equation. In the dynamic process in fixed bed, the variables studied will be the bed height and volumetric flow rate of the liquid phase. In this process, the performance of the column and the Adam's-Bohart and Yoon-Nelson models, which treat the initial part of the breakthrough curve and evaluate the adsorption velocity rate, will be evaluated. Mass balances will be performed in the fluid and particle phases in order to find the external mass transfer coefficient, the intraparticle diffusion and the axial dispersion of the dye in the bed. Finally, the experiments will be completed by directly treating the real effluent from the textile industry containing these dyes.

COMMITTEE MEMBERS:
Presidente - 350247 - JOAO FERNANDES DE SOUSA
Interno - 1670497 - HUMBERTO NEVES MAIA DE OLIVEIRA
Externo ao Programa - 1213158 - ANDRE ANDERSON COSTA PEREIRA - UFRN