enhs+660.TRACE+METALS.pdf+adobe

enhs+660.TRACE+METALS.pdf+adobe - Toxic Metals Include:...

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Toxic Metals Include: Heavy metals (e.g., lead, mercury, nickel) Other metallic compounds (e.g., aluminum, iron, tin) Featured in the CERCLA Priority List of Hazardous Substances
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CERCLA Priority List of Hazardous Substances The Agency for Toxic Substances and Disease Registry (ATSDR) has identified a list of the top 20 hazardous substances, known as the CERCLA Priority List of Hazardous Substances. This list is revised every two years.
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Top 20 Substances from the 2003 CERCLA Priority List of Hazardous Substances 1. Arsenic 2. Lead 3. Mercury 4. Vinyl chloride 5. Polychlorinated biphenyls 6. Benzene 7. Cadmium 8. Polycyclic aromatic hydrocarbons 9. Benzo(a)pyrene 10. Benzo(b)fluoranthene 11. Chloroform 12. DDT, P, P’ 13. Aroclor1254 14. Aroclor260 15. Dibenzo(a,h)anthracene 16. Trichloroethylene 17. Chromium, hexavalent 18. Dieldrin 19. Phosphorus, white 20. Chlordane
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Acute Toxic Metal Poisoning The symptoms of acute poisoning from exposure to metals generally have rapid onset—from a few minutes to 1 hour. Symptoms: -gastrointestinal effects (vomiting and stomach pain) -neurological effects (headaches, suppression of normal breathing, and convulsions).
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Symptoms of Chronic, Low Levels Exposure Greatest risks in children and pregnant women Reduced cognitive functioning Mimicking of chronic disease symptoms
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Gender Differences and Heavy Metal Exposure Effects The health effects of exposure to heavy metals (e.g., nickel, cadmium, lead, and mercury) are different for women than they are for men. These differences have been attributed to hormonal and metabolic processes related to menstruation, pregnancy, and menopause.
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Children and Exposure to Heavy Metals For fetuses, infants, and children (especially young children), heavy metals are known to present serious hazards, which can include: - impairment of physical and mental development - damage to internal organs and the nervous system - some forms of cancer -occasional mortality.
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Children and Exposure to Heavy Metals (continued) Nervous system damage Memory impairment Difficulty in learning Range of behavioral problems, such as hyperactivity syndrome and overt aggressiveness
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Heavy Metal Exposure among Children Versus Adults Because a child’s body weight is smaller than that of adults, children consume more food in proportion to their body weight and consequently receive higher doses of heavy metals that may be present in their food.
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Fetal Exposure Effects Some metals such as lead (Pb) and mercury (Hg) have the capacity to cross the placental barrier, causing potential fetal brain damage.
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A heavy metal has a high atomic weight with a specific gravity that exceeds the specific gravity of water by five or more times at 4 ° C. Heavy Metals of a Public Health Concern:
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enhs+660.TRACE+METALS.pdf+adobe - Toxic Metals Include:...

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