Banca de QUALIFICAÇÃO: ADRIELE LAENA FERREIRA DE MORAES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ADRIELE LAENA FERREIRA DE MORAES
DATE: 31/01/2024
TIME: 09:00
LOCAL: Por videoconferência
TITLE:

"CONTAMINATION BY POTENTIALLY TOXIC ELEMENTS IN THE METROPOLITAN REGION OF BELÉM, EASTERN AMAZON"

KEY WORDS:

metropolis; pollution rates; risk assessment; Eastern Amazon.

PAGES: 38
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:

The metropolitan region of Belém (MRB) is an important economic, cultural, and tourist hub in the Brazilian Amazon. In the region, the growth of urbanization and vehicular traffic can contribute to increased levels of pollutants in the environment, including potentially toxic elements (PTEs). Thus, the objectives of this study were to determine concentrations, calculate contamination rates, and assess the risks to the environment and human health due to exposure to PTEs in the MRB. Soil and road dust collections were carried out in the main densely populated areas of the five municipalities that make up the MRB: Belém, Ananindeua, Marituba, Benevides, and Santa Bárbara. The concentrations of PTEs were quantified by inductively coupled plasma mass spectrometry and used to estimate contamination rates and risks to the environment and human health. In both soils and road dust, concentrations of arsenic (As), barium (Ba), chromium (Cr), copper (Cu), manganese (Mn), molybdenum (Mo), nickel (Ni), lead (Pb), and zinc (Zn) were above natural values for the region, while
cadmium (Cd), mercury (Hg), and vanadium (V) had values below. The geoaccumulation indices (Igeo) of Cd, Hg, and Mo indicated low contamination, while As, Ba, Cr, Cu, Mn, Ni, Pb, V, and Zn showed contamination ranging from high to extreme. Potential ecological risk factor (RF) results indicated low risk for all PTEs,
except for As in road dust, which was associated with moderate risk. Of the elements studied, there is a non-carcinogenic risk for Mn and Zn for adults and children, and Cr only for children. Furthermore, there is a carcinogenic risk from As, Cr, Cu, Mn, Ni, Pb, and Zn for adults and children, and Co only for children. The results of this study can be adopted to define measures to protect the quality of the ecosystem and public health in the MRB. Further analyzes will be carried out to characterize the impacts of PTEs in a more robust way, including biomonitoring and determining the bioavailability and bioaccessibility of these contaminants in the MRB.

BANKING MEMBERS:
Externo à Instituição - MATHEUS DA SILVA FERREIRA - CEREGE (MOPG
Externo à Instituição - LUIZ HENRIQUE VIEIRA LIMA - UFRPE
Presidente - 6388356 - ANTONIO RODRIGUES FERNANDES
Externo à Instituição - Gerson Moreira Barros - IFPA