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Environ Sci Pollut Res Int
2018 Nov 01;2531:31535-31542. doi: 10.1007/s11356-018-3114-8.
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Lead exposure from households and school settings: influence of diet on blood lead levels.
Leroux IN
,
Ferreira APSDS
,
Silva JPDR
,
Bezerra FF
,
da Silva FF
,
Salles FJ
,
Luz MS
,
de Assunção NA
,
Cardoso MRA
,
Olympio KPK
.
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Lead is known as a potent toxicant to human health, particularly for children while their central nervous system is developing. The aim of this study was to investigate the associations between blood lead levels (BLLs) and lead exposure in the children''s diet, home, and school environments. A cross-sectional study was conducted with 153 children aged 1-4 years, in four day care centers (DCCs), where a high prevalence of lead exposure was previously found. Lead determination by graphite furnace atomic absorption spectrometry (GF-AAS) was performed for venous blood, drinking water collected in the DCCs, and the 24-h diet (n = 64). Environmental screenings were conducted to evaluate lead concentrations in the tableware, buildings, and playground items in all DCCs and children''s homes (n = 18) by using a field-portable X-ray fluorescence analyzer (FP-XRF). The BLL mean was 2.71 μg dL-1. Means for 24-h lead concentrations in the diet were 1.61 and 2.24 μg kg-1 of body weight (BW) in two DCCs. Lead concentrations in the water supply were lower than 2 μg L-1. More than 11% of the DCCs'' environmental analyses presented lead concentrations higher than or equal to 1 mg cm-2, as defined by the USEPA. The diet was not found to be a risk factor for lead exposure, but households and DCC settings raised concern. Children''s exposure to lead in DCC environments, where they spend the most part of their weekdays, appeared to be relevant. Graphical abstract ᅟ.
2011/23272-0 Fundação de Amparo à Pesquisa do Estado de São Paulo, 2012/21840-4 Fundação de Amparo à Pesquisa do Estado de São Paulo, 2014/20945-2 Fundação de Amparo à Pesquisa do Estado de São Paulo, 2014/22118-6 Fundação de Amparo à Pesquisa do Estado de São Paulo, 2015/01395-4 Fundação de Amparo à Pesquisa do Estado de São Paulo, 441996/2014-0 Conselho Nacional de Desenvolvimento Científico e Tecnológico
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