Banca de QUALIFICAÇÃO: ELANO COSTA SILVA
Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.STUDENT : ELANO COSTA SILVA
DATE: 07/08/2024
TIME: 14:30
LOCAL: Google meet
TITLE:
KEY WORDS:
Lignin. Adsorption. Produced water. Dye. Corn cob.
PAGES: 75
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Tecnologia Química
SPECIALTY: Tratamentos e Aproveitamento de Rejeitos
SUMMARY:
The growth of the world population and the increase in per capita consumption have stimulated the industrial sector to boost its production of goods and services. Consequently, pollutant production has also increased, and improper disposal of these pollutants into the environment can affect human health and ecosystems. Produced water from oil wells is a significant byproduct of oil extraction. This water is naturally found in underground reservoirs and is brought to the surface along with oil during the production process. Typically, produced water contains a variety of substances, such as salts, heavy metals, and organic compounds. Water polluted with dyes from the textile industry has also garnered the interest of researchers due to it being a significant environmental problem. During the dyeing process of fabrics and fibers, a variety of chemical dyes are used to give vibrant colors to clothing. However, a large portion of these dyes is not absorbed by the textile fibers and ends up being discarded with the wastewater, resulting in contaminated effluents. To mitigate these issues, recent studies have focused on the use of lignin as an adsorbent material for the removal of contaminants. This substance is promising due to its abundance in nature, being the second most abundant biopolymer after cellulose, and its multiple functional groups along its polymeric chain. Brazil is one of the largest corn producers in the world, and associated with grain production is the generation of a high volume of corn cobs, which contain about 15% lignin. In this context, the present work aims to study the use of modified lignin extracted from corn cobs as an adsorbent material for pollutants in contaminated effluents. Initially, lignin was extracted from the corn cob biomass through physical and chemical treatments. Next, the lignin was modified with various reagents to improve its interaction capacity for contaminant removal. Detailed characterizations of the adsorbent material were conducted to understand its physical, chemical, structural, and functional properties. Finally, bench tests were conducted to evaluate the material's efficiency as an adsorbent in the removal of pollutants from contaminated effluents. Preliminary results were promising, with modified lignins increasing the efficiency of contaminant removal from the water. However, more tests and characterizations are necessary to assess the feasibility of implementing the process.
COMMITTEE MEMBERS:
Presidente - 1753094 - ALCIDES DE OLIVEIRA WANDERLEY NETO
Interno - 3304882 - CARLOS EDUARDO DE ARAÚJO PADILHA
Interno - ***.674.113-** - DENNYS CORREIA DA SILVA - UFRN
Externo ao Programa - 1198847 - JOSE LUIS CARDOZO FONSECA - UFRNExterno à Instituição - GLAUBER CRUZ - UFMA