Banca de DEFESA: ERIVAL AMORIM GOMES JUNIOR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ERIVAL AMORIM GOMES JUNIOR
DATA : 20/02/2019
HORA: 09:00
LOCAL: Auditório da Faculdade de Farmácia, Campus de Ondina
TÍTULO:

Risk assessment of exposure to lead in vegetables cultivated and consumed in the Maragogipinho region - Bahia

PALAVRAS-CHAVES:

Lead; risk assessment; food safety; soil contamination.

PÁGINAS: 81
GRANDE ÁREA: Ciências da Saúde
ÁREA: Farmácia
SUBÁREA: Bromatologia
RESUMO:

Lead (Pb) is a heavy metal ubiquitous in the environment, with toxic characteristics to the environment and to the human health. Maragogipinho is a community located in the region of the Reconcavo Baiano which has the local economy based on the production of ceramic pieces. During the production of the ceramic utensils, the artisans process the Pb without any type of control and protection, contaminating itself and the environment. Thus, the objectives of this work were: (i) to measure the levels of Pb present in soil and in vegetables cultivated in this region; (ii) evaluate the transfer of Pb present in the soil to the vegetables and (iii) carry out a risk assessment based on the consumption of vegetables potentially contaminated by this toxic metal. The measurement of Pb contents in soil and vegetable samples were carried out using graphite furnace atomic absorption spectrometry (GFAAS), after acid mineralization in a microwave oven. Food frequency questionnaires were used to estimate the daily intake of the evaluated vegetables, and the anthropometric measurements of the study population were measured. The evaluated vegetables were manioc, papaya, banana, and coriander. From the data referring to the intake of selected vegetables, Pb content in the vegetables and data collected directly from the population, a risk non-carcinogenic assessment was performed using target hazard quotient (THQ) methodology. The median Pb concentrations in soil samples were 14.7 mg.kg-1 (3,7-66,5) for surface soil with 3cm-depth and 13.4 mg.kg-1 (0, 5-106.1) for 20-cm-depth soil. Pb levels in papaya and banana samples were below the limit of detection (LD). The median (range) of Pb in cassava and coriander samples were 0.06 mg.kg-1 (0.02-0.29) and 0.22 mg.kg-1 (0.06-3.02), respectively. The transfer factor was calculated to evaluate the mobility of Pb and presented a value of 0.05 for the cassava samples and 0.16 for the coriander samples, indicating that the leafy accumulates more lead than the roots. According to the daily intake of the evaluated vegetables, the average intake of the studied population is about 43 g (7-450) of cassava, 65 g (6.5-501.4) of banana, 11 g (20-85) of papaya. THQs calculated for the cassava samples were 0.0025 for the adult population and 0.0033 for the children considering the data collected directly from the population and 0.0010 considering a scenario frequently used by the regulatory agencies, however, all present an insignificant risk. Despite the use of Pb by the artisans and environmental contamination reported in the community, median concentrations of Pb were below the maximum limits allowed by regulatory agencies, so the risk arising from the ingestion of vegetables cultivated in the Maragogipinho community is considered insignificant. Therefore, it is possible to conclude that the consumption of vegetables cultivated in this community does not seem to represent a food insecurity.

MEMBROS DA BANCA:
Presidente - 2181841 - JOSE ANTONIO MENEZES FILHO
Externo ao Programa - 287167 - LUIZ ROGERIO PINHO DE ANDRADE LIMA
Externo à Instituição - MARIANGELA VIEIRA LOPES - UNEB