1998
DOI: 10.1159/000024558
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Abstract: The lead particle content of floor dust in a housing unit scheduled for interior lead paint hazard removal was characterised microscopically to identify the contributing source(s) of the lead. It was hypothesised that elevated levels of lead in the dust resulted from the deterioration of the lead-based paint on the indoor surfaces. The question of lead particle source attribution was addressed using a combination of scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). SEM/EDS prov… Show more

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“…House dust is an organic-rich matrix (18–37% organic C) with an affinity for metals, which serves as a useful sampling medium for detailed chemical, isotopic, and mineralogical investigations aimed at identifying and mitigating potential Pb sources. Solid sample dust speciation studies, using a combination of X-ray absorption near-edge structure (XANES), extended X-ray absorption fine structure (EXAFS) analyses, and synchrotron-based microprobe techniques, have shown that Pb speciation of Pb-contaminated dust in older Canadian homes (>50 yr) is dominated by pigments and other compounds used in paints at that time. , Childhood exposure estimates are improved by understanding the solubility of dust Pb in the gut (bioaccessibility), which is controlled by the chemical or mineral form (speciation) of the Pb. Thus in addition to the main goal of establishing a nationally representative baseline for urban Canadian homes, the present study uses synchrotron-based X-ray techniques to identify Pb compounds in elevated dust Pb samples and examines the relationship between solid sample Pb speciation and bioaccessibility.…”
Section: Introductionmentioning
confidence: 99%
“…House dust is an organic-rich matrix (18–37% organic C) with an affinity for metals, which serves as a useful sampling medium for detailed chemical, isotopic, and mineralogical investigations aimed at identifying and mitigating potential Pb sources. Solid sample dust speciation studies, using a combination of X-ray absorption near-edge structure (XANES), extended X-ray absorption fine structure (EXAFS) analyses, and synchrotron-based microprobe techniques, have shown that Pb speciation of Pb-contaminated dust in older Canadian homes (>50 yr) is dominated by pigments and other compounds used in paints at that time. , Childhood exposure estimates are improved by understanding the solubility of dust Pb in the gut (bioaccessibility), which is controlled by the chemical or mineral form (speciation) of the Pb. Thus in addition to the main goal of establishing a nationally representative baseline for urban Canadian homes, the present study uses synchrotron-based X-ray techniques to identify Pb compounds in elevated dust Pb samples and examines the relationship between solid sample Pb speciation and bioaccessibility.…”
Section: Introductionmentioning
confidence: 99%