Banca de DEFESA: NOELLE CARDOSO ZANINI

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : NOELLE CARDOSO ZANINI
DATA : 30/08/2022
HORA: 09:00
LOCAL: On-line
TÍTULO:

 BIODEGRADABLE ADSORBENT MEMBRANES FOR RETENTION OF COPPER FROM CONTAMINATED EFFLUENTS

PÁGINAS: 201
GRANDE ÁREA: Outra
ÁREA: Multidisciplinar
RESUMO:

 Industrial effluents discharged without treatment in line with environmental disasters such as those suffered in Mariana and Brumadinho are sources of potentially toxic elements (PTEs) in waterways. In these, organisms that come into contact with the polluted water can suffer negative consequences due to the toxicity of metal ions. Bivalent copper cations (Cu(II)), for example, are ions that can cause neurodegenerative diseases, affect the life of aquatic animals, and affect the populations that are supplied with the water. Despite Brazil's commitments to the Sanitation Legal Framework and to the 6th Sustainable Development Goal (ensure safe drinking water and sanitation), there are no sanitation indicators to retain PTEs like Cu(II). Thus. alternatives to retain PTEs like Cu(II) in contaminated water are urgent, which the use of biodegradable porous materials that do not cause further damage to health and the environment. This work proposed to obtain and characterize biodegradable matrix adsorbent membranes of poly(adipate-co-butylene terephthalate) (PBAT) combined with nano clay Cloisite® 20A (C20A) and nanometer curcumin (NC) to enhance Cu(II) retention. Ball milling was used as a top-down method to obtain the curcumin nanoparticles. Dynamic light scattering corroborated the nanometric nature of the C20A and NC particles, and zeta potential showed their tendency to agglomerate. X-ray diffractometry showed that the insertion of the dispersed phases causes an increase in the crystallinity index of the membranes when compared to pure PBAT. Fourier transform infrared spectroscopy (FTIR) demonstrated functional groups of the dispersed phases in the membranes that can favor Cu(II) adsorption. The deconvolution of the curves of EIPS/NIPS membranes showed higher hydrogen bonding coefficients (FH-CO) when compared to dip coating. Moreover, smaller pores and increased crystallinity of EIPS/NIPS membranes resulted in increased tensile modulus and tensile strength limit when compared to the dip coating membranes, and the composite membranes PBAT/0.5%C20A and PBAT/0.5%NC had the best mechanical performance (which was confirmed by statistical analysis using Student's t-test). The EIPS/NIPS membranes have hydrophilic characteristic with larger initial contact angles (AC) which favors the interaction with the liquid contaminated with the analysis ion. The wettability statistical analysis showed that the EIPS/NIPS membranes have lower CA, with the composite membranes (PBAT/0.5%C20A and PBAT/0.5%NC) standing out. Cost analysis showed that EIPS/NIPS membranes are more economically advantageous, being 43% cheaper than dip coating and that the addition of dispersed phases decreases the price per square meter when compared to pure PBAT. The adsorption tests showed that the EIPS/NIPS membranes were able to retain the Cu(II) ion from a 1000 ppm solution simulating the effluent from a plating industry. The membranes that stood out the most were the EIPS/NIPS composite membranes of PBAT/1%C20A and PBAT/0.5%NC, retaining 28% of contaminant.

MEMBROS DA BANCA:
Presidente - Interno ao Programa - 1671275 - DERVAL DOS SANTOS ROSA
Membro Titular - Examinador(a) Interno ao Programa - 1309493 - PEDRO ALVES DA SILVA AUTRETO
Membro Titular - Examinador(a) Externo à Instituição - ALEXANDRE TADEU PAULINO - UDESC
Membro Suplente - Examinador(a) Interno ao Programa - 1676364 - JULIANA MARCHI
Membro Suplente - Examinador(a) Interno ao Programa - 1760410 - JEVERSON TEODORO ARANTES JUNIOR
Membro Suplente - Examinador(a) Externo ao Programa - 2342998 - RODRIGO DE FREITAS BUENO