Banca de DEFESA: RENATA DE SOUSA NASCIMENTO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : RENATA DE SOUSA NASCIMENTO
DATA : 27/08/2019
HORA: 15:00
LOCAL: Sala 319, Unidade Amazônia
TÍTULO:

Transformation of bauxite residues into anionic clays

PALAVRAS-CHAVES:

Bauxite. Amazon region. Layered double hydroxide. Scientometric review

PÁGINAS: 107
GRANDE ÁREA: Outra
ÁREA: Multidisciplinar
RESUMO:

After the environmental disasters generated by the tailings dams of the iron mineral industry in Mariana (2015) and Brumadinho (2019) in Minas Gerais, the urgency of studies to know their chemical and mineral properties, as well as their conversion to low cost value-added products. As in Minas Gerais, the state of Pará has several tailings dams (iron, manganese, copper, aluminum, kaolin, nickel, gold, silicon) along its territory, most of which have no knowledge of their properties. mineral-chemical. In this work, a characterization study of bauxite (aluminum) washing tailings from the Amazon (West Region of Pará) was developed for the production of anionic clays, also demonized as layered double hydroxides (LDH). These materials are known for their technological importance for environmental clean-up, slow and controlled release of fertilizers and agrochemicals, adsorbents, ion exchangers, catalysts and nanomedicine. A scientometric study was carried out to map the landscape of LDH production and application in Brazil, as well as to identify the research centers and researchers that stand out in terms of publication number and the most widely used journal for publication. The results of the sciometric review revealed a growing increase in the last 30 years of work involving LDH with emphasis on large groups and research centers in the South and Southeast. As far as aluminum ore (bauxite) tailings are concerned, they have been successfully transformed into LDH nanomaterials with piroaurite and hydrocalumite structure, as well as Katoita, thus showing that an unwanted product in the mineral industry can be used as an interesting feedstock. low cost for the production of materials of great technological relevance, with the advantage of reducing their environmental impacts in the Amazon.

MEMBROS DA BANCA:
Presidente - 2142681 - BRUNO APOLO MIRANDA FIGUEIRA
Externa ao Programa - 2375788 - CHRISTIANE DO NASCIMENTO MONTE
Interna - 1964235 - HELIONORA DA SILVA ALVES