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Project Code [2002-PHDe-3/5]
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Project title
Environmental predictors of metal contamination in the vicinity of abandoned mine sites (Silvermines)
Primary Funding Agency
Environmental Protection Agency
Co-Funding Organisation(s)
n/a
Lead Organisation
University of Limerick (UL)
Lead Applicant
John Breen
Project Abstract
There is a long history of lead (Pb) and zinc mining in the Silvermines area of North Tipperary in Ireland. This cross sectional study is investigating the possible health impacts of Pb in the Silvermines area and was triggered by the death of cattle in 1999. Human health data and environmental data (dust soils and handwipes) are being analysed in an attempt to predict impact on human biomarkers. Over 1 100 (760 individuals) human blood samples were taken for blood lead levels (BPb) over a three-year period. Purposely designed questionnaires regarding possible exposure to lead and an individualis general health were completed. Pre-school and primary school children were targeted. Soil samples (n = 161) internal dust samples (n = 168) handwipes (n = 168) were analysed for heavy metal content. The Environmental Assessment Questionnaires suggest that the health of the population in the study area is similar to that of populations from previous non-Irish studies. In 1999 the mean BPb for children was 2.6 i?g/dl which was below the intervention lead concentration of 10 i?g/dl. Mean BPb was significantly higher in males (4 g/dl) than in females (2.6g/dl) with variation within age groups. Mean BPb levels were lower than anticipated based on similar studies carried out in former mining areas abroad. This suggests that the elevated environmental Pb levels are not currently being transferred to humans particularly children. However recent research undertaken in former mining areas abroad suggests that mine waste with or without smelting waste is related to elevated BPb and consequently safeguards must be taken to lessen exposure to this Pb source.
Grant Approved
�76,200.00
Research Hub
Healthy Environment
Research Theme
Environment and Human Health
Initial Projected Completion Date
n/a