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Title: Spatial and statistical analysis approaches to investigate the oral bioaccessibility of potentially toxic elements in Northern Irish soils
Author: Palmer, Sherry Beth
ISNI:       0000 0004 5369 7155
Awarding Body: Queen's University Belfast
Current Institution: Queen's University Belfast
Date of Award: 2015
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Using soil samples from the Northern Ireland Tellus Survey soil archive, the oral bioaccessibility of cadmium, chromium, arsenic, nickel, lead and vanadium was measured in Northern Irish soils on a national scale. As identified by the Tellus geochemical survey, all of these elements are present at elevated concentrations in Northern Ireland soils, in some cases exceeding available human health soil screening criteria. Oral bioaccessibility testing results were combined with a pre-existing Northern Ireland oral bioaccessibility data set derived from analysis of different soil samples. From this joined data set, interpolated maps were generated to illustrate geographical trends in trace element oral bioaccessibility across the study area. Oral bioaccessibility data and previously measured geochemical variables from the same soil sample locations were then subjected to statistical analyses to underpin factors that affected trace element bioaccessibility in study area soils. Correlation analysis, factor analysis and linear regression techniques identified clay, peat, anthropogenic, igneous and sedimentary geology components each exerting unique controls over trace element oral bioaccessibility.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available