The lead

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The Lead

5. It is discovered that it is due to lead contamination.

4. Uranium is easy to measure and lead cannot be measured well

3. Uranium is easy to measure and lead cannot be measured well

2. Measurement from the amount of Uranium and Lead in meteorites

6. Patterson attempts to eliminate lead in gasoline

1.Attempts to measure the age of the earth

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Attempts to measure the age of the Earth

In 1779 the French naturalist Comte Du Buffon carried out an experiment: he created a small globe whose composition was similar to that of the planet and then measured its rate of cooling. Thus, he estimated the age of the earth at about 75 thousand years.

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Measurement from the amount of Uranium and Lead in meteorites

Uranium-lead (U-Pb) dating is one of the oldest and most refined radiometric dating systems. It can be used to date rocks that formed and crystallized from 1 million years ago to 4.5 billion years ago.

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Uranium is easy to measure and lead cannot be measured well

The uranium-lead dating method is based on two decay chains, the uranium series from ²³⁸U to ²⁰⁶Pb, with a half-life of 4.47 billion years, and the actinium series from ²³⁵U to ²⁰⁷Pb, with a lifetime 704 million years old. Uranium-thorium dating, also called thorium-230 dating, uranium-series disequilibrium dating, or uranium-series dating

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It is found to be due to lead contaminationLead is a toxic metal naturally present in the earth's crust. Its widespread use has led to significant environmental contamination, human exposure, and serious public health problems in many parts of the world.

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Clair Patterson (left), took on Thomas Midgley (centre) and Robert Kehoe (right) in order to remove lead from fossil fuels.

Patterson attempts to eliminate lead in gasoline

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Current situation and current measures.

Although when talking about Pb it is a double-edged sword, on the one hand, it is a widely used metal, but on the other hand it is extremely dangerous for health, it is neurotoxic and this makes it a dangerous pollutant.There are different sources of Pb contamination and these are found in different areas, basically in industries and consumption, but it is important to remember that Pb is an element that exists in nature, therefore, it is in small quantities and is very dispersed. . The problem is in its interaction with the human being, since man uses Pb in situations and places that it should not be, or else the amounts should be minute. Pollution is due to both elemental lead and its compounds, these remain in suspension and can be transported. This pollution affects the atmosphere, soil and water.

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