lead pollution
Post on 18-Jul-2015
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6500 BC. - Lead discovered in Turkey, first mine.
500 BC-300 AD.- Roman lead smelting produces dangerous emissions.
100 BC. - Greek physicians give clinical description of lead poisoning.
1854 - Tetraethyl lead discovered by German chemist.
1921 - Midgley discovers that tetraethyl lead curbs engine knock.
Half-life Of Lead - 25 DAYS:BLOOD. 40 DAYS:SOFT TISSUE. 20 YEARS:BONE
Lead can be inhaled.
Tetraethyl lead can be absorbed via skin.
Cigarettes are the major source of Lead.
GASOLINE
FOOD
SOIL
WATER
WORK EXPOSURE
Lack of ConcentrationMiscarriage & InfertilityNauseaDyspepsiaAnaemiaHypertensionFatigue
DOs
Use unleaded petrol.Safely dispose Lead batteries.Take more Ca & Fe in diet.Avoid smoking.Wear gloves while soldering.
DON’Ts
Acknowledgement
We would like to thank our teachers for allowing us to make this project.It helped us to acquire a lot of information of the topic, without which we would have remained in the dark about such serious threats to ourselves and our environment.
Bibliography
The following sites and books were helpful in the completion of the project:-
NCERT Biology for Class XII
www.google.com
www.wikipedia.org
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