LEAD

1
LEAD

• Pb
• Atomic Mass 207.2
• Atomic Number 82

2
PROBLEM STATMENT

• Does living in older communities cause a greater
  risk of lead poisoning?

3
HYPOTHESIS

• It is believed that families who live in older
  communities have a higher risk of lead poisoning.

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BACKGROUND

• Lead can be ingested from hand to mouth contact.
• 20 of adults daily lead intake is through water.
• Lead is found in the pipes which enters the water
  supply.
• If inhaled or ingested 5 is stored in the blood
  and 95 is stored in the bone.
• Blood lead is short term with a half-life of 20
  days, bone lead is much longer with a half-life
  of 600 to 3000 days.

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BACKGROUND CONTINUED

• When blood lead is depleted, it is continually
  replaced with the lead from the bone, but the
  half-life will decrease.
• Lead can cause anemia, high blood pressure,
  kidney damage, miscarriages and subtle
  abortions,disruption of nervous system, brain
  damage,sperm damage, diminished learning
  abilities of children.

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Data
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CONCLUSION

• It is shown that families who live in older
  communities are at a higher risk for lead
  poisoning due to the ageing environment such as
  houses,playgrounds, and other surroundings.
• If someone is suffering from lead poisoning
  he/she must be removed from the source(change in
  work conditions, staying away from hobbies which
  have anything to do with lead).
• Chelating agents are treatments which form
  complexes with the lead and prevent it from
  binding to other cell constituents.

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CONCLUSION CONTINUED.

• The most widely used chelate is sodium calcium
  edetate which exchanges calcium for lead and is
  very effective at keeping the lead from the bone.
• Dimercaptosuccinic acid is the mainstay of the
  treatment of childhood lead poisoning, this
  treatment mobilizes lead from soft tissue.