Arsenic exposure and health effects: proceedings of the by Willard R Chappell; Charles O Abernathy; Rebecca L Calderon

By Willard R Chappell; Charles O Abernathy; Rebecca L Calderon

The Society of Environmental Geochemistry and well-being (SEGH) 3rd overseas convention on Arsenic publicity and future health results used to be held from July 12-15, 1998 in San Diego, California. numerous striking papers and posters generated vigorous dialogue and debate not just approximately medical matters but additionally approximately coverage and regulatory concerns. whereas constructed international locations are contemplating spending maybe billions of Read more...

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Extra resources for Arsenic exposure and health effects: proceedings of the Third International Conference on Arsenic Exposure and Health Effects, July 12-15, 1998, San Diego, California

Example text

Nails can take up and concentrate arsenic in vitro (Smith and Hendry, 1934) and therefore like hair, are subject to external arsenic contamination. Subsequent discussion will be confined to hair. Hair arsenic can be employed to identify chronic arsenic poisoning provided that external contamination can be excluded. However, the relationship between hair arsenic levels and degree of toxicity is only very approximate. , 1977). However, levels can be higher in people living in polluted environments.

To make sound comparisons these biological exposure parameters may thus relate to a steady state situation Consistency ofBiomarkers of Exposure to Inorganic Arsenic 37 TABLE 2 Literature data related to the relationship between arsenic in drinking water and the urinary excretion of the element (mean values) Countries Authors Drinking water As level High Low n Alaska Argentina /ig As/L in water urine jLig As/L in water urine 30 49 39 13 75 401 222 1475 45 178 143 742 19 34 70 5 11 282 35 200 130 52 260 160 Harrington et al.

Ki^hl: Fig. 3. Relationship between As urinary excretion and As level in drinking water in different populations. , 1981). When As has been ingested chronically for years, longer periods of clean water use appear necessary to restore a background urinary excretion. Intervention studies (Hopenhayn-Rich et al. , 1997) show that the consumption during 2 months of water with 45 /ig As/L instead of 600 \L^Jh reduces the urinary excretion from 636 to 166 /xg/L. , 1998). , 1997) the restoration of a normal urinary excretion of As may require a few years.

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