Banca de DEFESA: LEONARDO LOPES SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : LEONARDO LOPES SANTOS
DATA : 09/04/2019
HORA: 14:00
LOCAL: IGEO/UFBA Auditório A
TÍTULO:

Ocurrence of organchlorine compounds in biota from Todos os Santos Bay, Bahia, Brazil

PALAVRAS-CHAVES:

PCBs, bivalves, fish, BTS

PÁGINAS: 46
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Geociências
RESUMO:

In order to evaluate contamination by PCBs in a tropical bay exposed to different anthropic pressures, samples of bivalves (mangrove oyster, mangrove mussel and clams) were collected in different parts of Todos os Santos Bay, Bahia, Brazil. In addition, samples of bivalves and fish, purchased in a seafood market in the city of Salvador were analyzed to study human exposure to PCBs through ingestion. Identification and quantification of PCBs were done by GC/MS after microwave extraction and purification with sulfuric acid. In samples of bivalves, concentrations ranged from <0.08 to 50.13 ng g ^-1 (dry weight), with the highest values being detected in mangrove oyster, followed by clams and mangrove mussel of the Subaé estuary and Madre de Deus/Mataripe; both regions known to be impacted by anthropic activities. Regarding fish samples, froma all 12 species analyzed, only 5 presented levels of PCBs above the detection limit, ranging from 0.23 to 4.55 ng g ^-1 and 0.51 to 26.05 ng g ^-1 by dry weight and lipid weight, respectively. In general, concentrations of PCBs in BTS are lower than in most regions around the world, especially those located in the Northern Hemisphere. Indexes showed that local biota should not feel adverse effects related to the presence of these contaminants, just as the consumption of the fish marketed in the city of Salvador apparently does not represent a clear risk to human health.

MEMBROS DA BANCA:
Presidente - 995.760.150-49 - JULIANA LEONEL - USP
Interno - 3055474 - TATIANE COMBI
Externo ao Programa - 1522396 - VANESSA HATJE