Banca de DEFESA: SAMIRES MOURA MALAQUIAS PINHEIRO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : SAMIRES MOURA MALAQUIAS PINHEIRO
DATA : 08/03/2019
HORA: 14:00
LOCAL: Instituto de Geociências
TÍTULO:

FORMATION OF AGGREGATE OIL MATERIAL OIL SUSPENSION (OSA) AND HPA DISPERSION IN THE ESTUARY OF RIO SÃO PAULO, BAHIA: A NORTEADORA TOOL FOR THE PREVENTION OF ECOTOXICOLOGICAL IMPACTS

PALAVRAS-CHAVES:

pollution, anthropogenic activities, ecotoxicology, polycyclic aromatic hydrocarbons (PAHs), metals, effluents, petroleum

PÁGINAS: 100
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Ambiental
SUBÁREA: Saneamento Básico/Esgotos/Reator Anaeróbico
RESUMO:

The estuarine regions are of great importance to the populations mainly due to the diversity of natural resources. They have great environmental, social and economic wealth, but for decades they are subject to the consequent impacts of anthropic activities. The objective was to observe the dispersion provided by the formation of oil-suspended particulate material aggregates (OSAs), to use the data obtained as a guiding tool in the prevention of ecotoxicological impacts. The characterization results indicate that although the region has important ecological functions, it is impacted by anthropic activities related to the operations of the oil and other industries, inadequate occupation of its banks and port practices that occur in the Baía de Todos so Santos. The degradation occurred could be characterized by dissolved oxygen values varying between 2.82 - 6.52 mgL-1, ammonia, in the sampling stations 10 to 13 varying between 1.4-1667 mgL-1, and nitrate, in the stations of (0.70 mg L -1), due to the concentration of metals associated with suspended particulate matter (SPM), which present risks ecosystems and by polycyclic aromatic hydrocarbons (PAHs) in SPM of anthropogenic origin. Parallel to this, the formation results of the OSA indicate that the characteristics of the water collected at station P17 was the one that most dispersed PAHs to the water column (566,989.84 μg g -1). The biogeochemical characteristics that most influenced the formation of OSA were the concentrations of chlorophyll a and salinity. In general terms, there were higher dispersions for the water column, potentiating the biodegradation of these compounds by hydrocarboclastic organisms, increasing the ecotoxicity for pelagic organisms, however, reducing the ecotoxicological impacts associated with the presence of PAHs to benthic organisms. The exceptions were the stations: 2, 4, 7, 8, 14 and 18 that formed OSA with negative buoyancy and presented higher rich of ecotoxicological impacts for the substrate of the region. From the results found, it is possible to suggest that the areas of the sampling stations: 2, 4, 7, 8, 14 and 18 as a priority for the application of protective measures in case of oil spill accidents, although PAH concentrations of accordance with ERM (NOAA) presents ecotoxicological risks throughout the estuary. The simulation studies for the formation of OSAs presented relevant results both in predicting the dispersion of PAHs and as a guiding tool in the prevention and mitigation of ecotoxicological impacts in estuarine environments affected by hydrocarbons.

MEMBROS DA BANCA:
Presidente - 2897782 - ICARO THIAGO ANDRADE MOREIRA
Interno - 2322888 - OLIVIA MARIA CORDEIRO DE OLIVEIRA
Externo ao Programa - 2390219 - ADRIANA COSTA FERREIRA