Banca de QUALIFICAÇÃO: ALESSANDRA RAQUEL DANTAS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : ALESSANDRA RAQUEL DANTAS
DATA : 27/03/2025
HORA: 14:00
LOCAL: Meet
TÍTULO:

SÍNTESE E CARACTERIZAÇÃO DE UM POLÍMERO INTELIGENTE PARA ADSORÇÃO SELETIVA DO
CORANTE RODAMINA B EM MEIOS AQUOSOS

PALAVRAS-CHAVES:

Adsorvente. Efluentes. Polímero Impresso Molecularmente (MIP).

PÁGINAS: 71
RESUMO:

The textile dye industry greatly influences the global economy. Many artificial dyes have characteristics
that are toxic to the environment and to living beings. By using molecularly imprinted polymers (MIPs), it

is possible to detect and quantify dyes. These efficient materials are low cost, highly selective and long-
lasting. This project proposes the synthesis of MIP using as a template molecule the dye Rhodamine B, a

pollutant classified as a water-soluble fluorescent xanthene dye, used to dye various substances. It has
carcinogenic properties and can cause irritation and various other diseases. These harmful impacts are
a stimulus for the development of research aimed at reducing them in aqueous systems. The control
material NIP, non-molecularly imprinted polymers, was also synthesized in order to conduct comparative
studies. The synthesized polymers were characterized by scanning electron microscopy (SEM), infrared
(IR), thermogravimetry (TGA), specific surface area (BET) and point of zero charge (PCZ) analyses. The
calibration curve for Rhodamine B dye was performed through UV-Visible spectrophotometry analysis in
order to evaluate the adsorption when different factors are varied. Thus, the polymer mass, pH of the
analytical solution, concentration of the analytical solution, interaction time between polymers and
analytical solution and selectivity of the polymers to Rhodamine B were varied. The Rhodamine B
molecule was modeled with the aid of the Materials Studio software. The kinetic and adsorption
isotherm studies were applied to the experimental data of the adsorption tests with both polymers, with
the most appropriate models being the pseudo-second-order kinetic model and the Freundlich isotherm
model, respectively. The MIP material demonstrated superior selectivity for the analyte compared to
potential interferents. The recovery percentage, determined using UV-Visible spectrophotometry, fell
within the range of 87.17%. Molecularly imprinted polymers (MIPs) may represent an interesting and
promising approach for the rapid and selective determination of Rhodamine B dye in industrial effluent
and river samples by offering significant advantages in terms of selectivity, durability and reusability.

MEMBROS DA BANCA:
Interno - 1919410 - JULIO CESAR PEREIRA BARBOSA
Interna - ***.211.994-** - CLODOMIRO ALVES JUNIOR - UFERSA
Externo à Instituição - Sajjad Hussain - UFAM