Banca de QUALIFICAÇÃO: LAYSA RENATA DUARTE BRITO SABINO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : LAYSA RENATA DUARTE BRITO SABINO
DATE: 17/09/2024
TIME: 14:00
LOCAL: videoconferência
TITLE:

TREATMENT OF SWIMMING POOL WATER CONTAMINATED BY OCTOCRYLENE FROM COMMERCIAL SUNSCREEN.

KEY WORDS:

Octocrylene; electrochemical treatment; electroanalysis 

PAGES: 150
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Analítica
SPECIALTY: Análise de Traços e Química Ambiental
SUMMARY:

Chemical compounds present in sunscreens, such as organic UV filters, particularly octocrylene, can have adverse effects on aquatic ecosystems. Therefore, it is necessary to properly treat effluents that have this type of contamination. The treatment of contaminated water involves several stages: primary treatment, in which physical processes are used to remove solid particles through methods such as filtration and decantation; secondary treatment in which chemical processes occur that use chemical reactions to neutralize toxic substances, such as the anodic oxidation used in the present investigation and, finally, tertiary treatment in which monitoring is done through the water quality index to maintain it within regulatory standards. This work presents an electrochemical treatment for swimming pool water contaminated with commercial sunscreen that was treated by anodic oxidation, and after degradation the quality index parameters were monitored. Results such as pH (7.4 t=0min - 4.4 t=180min), chloride content (0.002M), current density 10mA/cm², oxygen dissolution ([COD]/[COD]0 = 0.2 ), conductivity (1091mS/cm t =0min – 0 mS/cm t=180min) and turbidity (93.5 t=0min – 5.64 t=180min) corroborated the degradation of organic matter. Energy consumption was analyzed throughout the electrolysis. Furthermore, a comparative study was carried out between electroanalysis and chromatography techniques for the detection and quantification of octocrylene in swimming pool water, obtaining promising results for the electroanalytical technique.

COMMITTEE MEMBERS:
Interna - 2140818 - AMANDA DUARTE GONDIM
Presidente - 1645110 - CARLOS ALBERTO MARTINEZ HUITLE
Externa à Instituição - LETÍCIA GRACYELLE ALEXANDRE COSTA - UFRN
Externa à Instituição - MAIARA BARBOSA FERREIRA - UNESP