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: 01/07/2025
TIME: 09:00
LOCAL: NUPEG I - UFRN
TITLE:

Adsorption of red & blue s-matrix 150 reactive dyes using pyrolysis coal ash and activated carbon

KEY WORDS:

Reactive dyes; elephant grass; ash; adsorption; kinetics; batch study

PAGES: 120
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, to be used as an adsorbent, in addition to the use of commercial activated carbon for the adsorption of individual dyes such as Bezaktiv red and blue S-matrix-150. The adsorbent produced from elephant grass pyrolysis coal will be modified by a physical process where it will be placed in an oven at 800°C and will also be chemically treated with 3.5M NaOH followed by characterization. The adsorption process occurs in batches where both raw and treated adsorbents will be tested. 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 and the Elovich kinetic model. Finally, the experiments will be performed on synthetic solutions of the two dyes where they simulate a real effluent.

COMMITTEE MEMBERS:
Presidente - 1670497 - HUMBERTO NEVES MAIA DE OLIVEIRA
Interno - 1149554 - OSVALDO CHIAVONE FILHO
Externo ao Programa - 1213158 - ANDRE ANDERSON COSTA PEREIRA - UFRN