Although there has been considerable concern regarding cross-border industrial contamination between Mexico and the United States, there are remarkably few data.
One notable case study is the smelter in El Paso, Texas.
In 1974 blood lead levels higher than 40 mug/dl were detected in 52% of children studied near the smelter, in the adjacent Mexican community of Anapra in Ciudad Juarez, Chihuahua.
Lead smelting at this plant was halted in 1985, and as a result, lead levels in air decreased sharply ; consequently, children's exposure to lead and other metals should have diminished accordingly.
In order to assess the effect of removal of lead emissions from the area, three geographical locations in Anapra, varying in distance from the smelter source, were evaluated for lead, arsenic, and cadmium levels in soil and for lead in blood of children.
It was found that lead levels in soil were inversely correlated with distance from the smelter.
Arsenic and cadmium levels in soil were constant among the three sectors.
However, at residential sites closer to the smelter, a higher percentage of children was found with blood lead levels exceeding the Centers for Disease Control's action level of 10.0 mug/dl.
In the sector closest to the border 43% of children had blood lead levels greater than 10.0 mug/dl.
Although blood lead levels in children living in Anapra have dropped approximately fourfold in 20 years, our results indicate a moderate continued risk of lead exposure. (...)
Mots-clés Pascal : Plomb, Enfant, Homme, Métal lourd, Polluant, Environnement, Fonderie, Industrie métallurgique, Proximité, Frontière, Mexique, Amérique Centrale, Amérique, Etats Unis, Amérique du Nord, Etude longitudinale, Réduction, Exposition, Air, Zone résidentielle, Législation, Financement, Sol, Arsenic, Cadmium
Mots-clés Pascal anglais : Lead, Child, Human, Heavy metal, Pollutant, Environment, Foundry, Metallurgical industry, Proximity, Border, Mexico, Central America, America, United States, North America, Follow up study, Reduction, Exposure, Air, Residential zone, Legislation, Financing, Soils, Arsenic, Cadmium
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0534369
Code Inist : 002B03M01. Création : 13/02/1998.