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Aluminum Cadmium Lead
Lead is a naturally occurring bluish-gray
metal found in small amounts in the earth's
crust. Lead is a chemical element with the
atomic number 82 Extremely toxic to
humans!!
- Weathering and erosion
- Volcanic eruption
- factories
- Forest fires
•Lead piping
•Leaded gasoline
•lead acid batteries
•Industrial solid waste and waste water
•Cosmetics
•Lead based paints
•Tanneries
•Lead particles from vehicular emission
•Jewelry
Where it launches factory chimneys many metal oxides into the air that is contaminated and transmits this pollution to humans, animals and plants ..
as well as spouting car exhaust lead oxides resulting from the fourth combustion ethyl lead into the atmosphere and this one of the largest lead contamination ways .
The rusted metal rusts on the ground, dissolves with
water and rain, and descends into the soil layers
leading to pollution of underground water sources
and mineral plants.
Where the remnants of some of the seaside factory
in the water .. leads to pollution of the marine
organisms minerals and travels by sea fishing to
human and animal ..
City in China, the city of Tayanyanj, lead production center
in China. Population of 160,000 inhabitants, the
concentration of lead in the air and the soil more than 10
times normal levels, and concentration in agricultural
crops more than 24 times from health standards.
Cadmium is a naturally occurring minor element,
Metallic components in the earth’s crust and
oceans
•Erosion of rocks and soils
•Forest fires
•Volcanic eruptions
•Nickel-Cadmium Batteries
•Phosphorous fertilizers containing
cadmium
•Cadmium pigments
•Burning of fossil fuel
•Cement industry
•Release during combustion
Cadmium in air from the
Cadmium from are
transferred directly to humans.
Any cadmium in sewage is there because it has somehow entered the sewerage system via drains in homes or from drains in the streets and roads.
- Food
- Water
- Particles you breathe in.
- Very little cadmium enters through your skin.
- The shattered pieces of jewelry launches cadmium thirty times more of the pieces is broken.
Mercury is the only common metal
which is liquid at ordinary
temperatures. It rarely occurs free
in nature Highly toxic in vapor
form.
Liquid mercury itself is not highly
toxic.
Mercury tooth
Fillings
thermometer Fluorescent
Lamps
In 1932, the sewage discharge in Japan which
contained high levels of mercury in the port
Minimata", which resulted in the
accumulation of bio mercury in marine
organisms. And died 234 people and injured
more than 30,000 people.
Arsenic oxides were the common poisons
used for murder and suicide from roman
times through to the middle ages
Arsenic compounds were used widely as
pesticides before the organic chemicals
era
Arsenic is very much similar to
phosphorous
Arsenic
• Pesticides
• Mining, smelting of gold, lead, copper and
nickel
• Production of iron and steel
• Combustion of coal
• Used as a wood preservative
• Herbicides
• Tobacco smoke
• Wallpaper paste and pigments in wallpaper
77 million people in Bangladesh, are exposed to
toxic levels of arsenic, as a result of drinking
contaminated groundwater.
is present in the bodies of animals and plants.
And it is not considered extremely dangerous, and
can get rid of it easily.
the chemical composition without carbon include:
oxygen, chlorine and sulfur.
Arsenic about 2000 years ago was known as a
medicine and as a means of killing and revenge.
atomic absorption spectrometer
device which is capable of
detecting heavy metal and
another trace element in soil ,
water organisms or living
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