Banca de QUALIFICAÇÃO: JOSÉ RONALDO DA SILVA JÚNIOR

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : JOSÉ RONALDO DA SILVA JÚNIOR
DATE: 30/06/2026
TIME: 15:00
LOCAL: Híbrido - Auditório do NUPPRAR - UFRN
TITLE:

EVALUATION OF GLYCERIN AS AN EXTRACTION SOLVENT FOR MICROPLASTICS IN

SEDIMENTS: A SIMULATED STUDY ON THE RECOVERY OF POLYESTER GLITTER

KEY WORDS:

Microplastics, Glycerin, Polyester glitter, Microplastic extraction, Microplastic analysis.

PAGES: 87
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Físico-Química
SPECIALTY: Cinética Química e Catálise
SUMMARY:

The rise of plastic pollution, driven by increased consumption of plastic materials over the last few decades, has led to the emergence of a silent and harmful

problem: microplastics, particulate materials smaller than 5 mm that deposit in different ecosystems and may exhibit varied and unknown mechanisms of

waste adsorption and accumulation, affecting agricultural soils, bacterial cultures, biological systems, and the balance of fauna and flora. With the aim of

evaluating new methodologies for the extraction of microplastics, specifically in sedimentary matrices, which present complexity due to their varied structure

and potential for additional organic content, this study seeks to investigate the potential of glycerin as a liquid for the extraction of microplastics in this

matrix through a simulated flotation system involving sediment, glycerin, and polyester glitter as the target microplastic of the research, performing

comparative analyses between different media, such as tetramethylammonium hydroxide (TMAH) and cooking oil, as well as comparisons of temperature

and the method of obtaining glycerin, enabling the evaluation of the liquid’s behavior and interaction with the studied microplastic, for which

characterizations were performed using Thermogravimetric Analysis (TGA), Infrared Spectroscopy (FTIR), Pyrolysis coupled with gas chromatography and

mass spectrometry (Py-GC/MS), and recovery indices in the sedimentary matrix. This study allowed us to examine the potential of glycerin as a non-toxic,

low-cost liquid that does not cause significant side reactions that affect the instrumental detection limits used in the analysis, highlighting the potential for

applying glycerin—whether commercial or a byproduct of biofuel synthesis—as a promising liquid for the extraction of microplastics from sedimentary

matrices.

 

COMMITTEE MEMBERS:
Presidente - 2140818 - AMANDA DUARTE GONDIM
Externa à Instituição - ANNE GABRIELLA DIAS SANTOS - UERN
Externa ao Programa - ***.679.064-** - ARUZZA MABEL DE MORAIS ARAUJO - UFRN
Interno - 1645110 - CARLOS ALBERTO MARTINEZ HUITLE