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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