Banca de QUALIFICAÇÃO: TEIDIANE SANTOS CARDOSO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : TEIDIANE SANTOS CARDOSO
DATA : 18/11/2020
HORA: 09:00
LOCAL: Webseminário
TÍTULO:

Study of characterization of humic and fulvic acids in sedimentary profile and their relationship with the aquatic system

PALAVRAS-CHAVES:

Humic substances, properties, contaminants, environmental impacts, environment.

PÁGINAS: 41
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Analítica
ESPECIALIDADE: Análise de Traços e Química Ambiental
RESUMO:

The largest district of organic matter (MO) in soils, waters and sediments occurs in the form of humic substances (SH), a heterogeneous mixture of organic compounds aggregated by weak interactions of a hydrophobic nature and by hydrogen bridges. SH can be classified, operationally, according to the solubility in aqueous medium, humic acids, fulvic acids and humines. Humic and fulvic acids stand out, since they play an important environmental role, due to their characteristics, it allows an interaction with metal ions present in toxic substances responsible for the deterioration of natural ecosystems. The study of the interaction of these substances with metal ions has aroused great interest in the scientific community, since humic acids (HA) and fulvic acids (AF) trap these ions, stabilize and assist in degradation. Therefore, the understanding of their interaction mechanisms is of paramount importance for the development of methods for the active control of pollutant mitigation in the natural environment, as well as for obtaining materials that contribute to a better understanding of the causal relationship. effect between production processes and their environmental impact on aquatic ecosystems. In this sense, the present work aims to present a synthesis of the current knowledge on the fundamentals, structure and properties of humic and fulvic acids, as well as, the extraction, fractionation and the existing relationships between these substances and environmental contaminants (heavy metals) in aquatic sedimentary profile. To carry out this study, a systematic review was carried out, in which only scientific articles were selected, considering the search for titles (title, abstract, keywords). The descriptive survey took place in the following databases: Web of science, Scopus and SciELO, in the years 2015 to 2020. The keywords used were “humic acids, fulvic acids and sediments”, written in the English language to cover a greater number of publications. The search resulted in 245 articles, 122 of which were found on the Web of Science, 2 on SciELO and 121 on Scopus. Of the results found, approximately 70% are in the area of environmental sciences.

MEMBROS DA BANCA:
Presidente - 962.287.925-04 - ALLISON GONÇALVES SILVA - IFBA
Externo ao Programa - 3044886 - MARIO MARQUES DA SILVA JUNIOR
Externo à Instituição - SERGIO ANUNCIAÇÃO ROCHA - UFRB