Banca de QUALIFICAÇÃO: PEDRO ITALO DA CRUZ

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : PEDRO ITALO DA CRUZ
DATE: 18/12/2023
TIME: 10:00
LOCAL: videoconferência
TITLE:

Chitosan-based superparamagnetic composite for tetracycline adsorption

KEY WORDS:

Chitosan; Magnetite; Composite; Adsorption; Tetracycline

PAGES: 50
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Orgânica
SPECIALTY: Polímeros e Colóides
SUMMARY:

Polymer-based magnetic compounds exhibit desirable properties, such as high surface area and easy removal, especially for environmental remediation. Both chitosan and magnetite are biocompatible, biodegradable and non-toxic, in addition to being low-cost and easy to operate, which allows their use mainly in the treatment of wastewater. Therefore, this study was carried out to obtain the chitosan-based magnetite compound (CS/Fe3O4) through the coprecipitation method, where the tetracycline adsorption capacity of the compound was investigated and the equilibrium time was identified. The adsorption studies were prolonged at temperatures of 25 and 35 ± 2 °C and were monitored by readings on the UV-Vis spectrophotometer at 357 nm. The compound was characterized by infrared, X-ray diffraction, zeta potential and magnetic measurements. FTIR, XRD and zeta potential analyzes and magnetization curves confirmed the obtaining of the composite. The results showed that the adsorption of tetracycline at 25 ºC reached the Lagmuir and Sips models, while the adsorption at 35 ºC reached the Freundlich and Sips models. The compound showed a tetracycline adsorption capacity of 2.47x10⁶ mg/g.

COMMITTEE MEMBERS:
Interno - 1803692 - FABRICIO GAVA MENEZES
Presidente - 1198847 - JOSE LUIS CARDOZO FONSECA
Externa à Instituição - LETICIA STRECK - F.M.Nassau