Geographical variations of naturally occurring Pb-supported Po in teeth of juveniles in the UK
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چکیده
This study examines geographical variations in the level of naturally occurring Pb-supported Po in permanent teeth of juveniles in the UK. Permanent teeth extracted from 278 juveniles for orthodontic purposes were obtained from 48 counties in the UK. Po activity concentration was measured on the outer enamel surface using TASTRAK α-particle sensitive plastic track detectors. Po levels in teeth were associated with domestic radon concentration. The geometric mean ± SE activity concentrations in teeth from urban, suburban and rural areas, excluding the high radon area of Devon were 8.41 +0.25/-0.24, 7.76 +0.37/-0.35 and 7.20 +0.49/-0.46 Bq kg respectively. Overall, there was no significant association between α-activity of permanent teeth and proximity to major UK motorways. However, a statistically significant association with respect to donors living downwind (on the easterly side) of the motorways was found. This effect was greater for sections of the M5 and M6 motorways which traverse urban areas. Inhalation uptake is an important pathway of exposure to Pb-supported Po, especially with respect to domestic radon exposure.
منابع مشابه
Aspects of the geographical variations of naturally occurring 210Pb/210Po in permanent teeth of juveniles in the UK.
PURPOSE To study geographical variations in the level of naturally occurring 210Pb-supported 210Po in permanent teeth of juveniles in the UK. MATERIALS AND METHODS Permanent teeth extracted from 278 juveniles for orthodontic purposes were obtained from 48 counties in the UK. 210Po activity concentration was measured on the outer enamel surface using TASTRAK alpha-particle-sensitive plastic tr...
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تاریخ انتشار 2004