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the sulfur cycle

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Lisa Millbank

on 23 October 2014

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Transcript of the sulfur cycle

The Sulfur Cycle: Diagram
Sulfur and it's function
A major source of sulfur is from pollution, caused by man-made activities. These are mixed with water in the air falling in rain into water basins.(Question 4)
one of the most important sulfur compounds is sulfuric acid, which is used to make fertilizers, automobile batteries, iron and steel and plastics. (Question 6)
Other uses for sulfur include insecticides; to kill insects, and matches, used to start fires. (Question 7)
Sulfur cycle - steps
• Mineralization of organic sulfur to the inorganic form, hydrogen sulfide, H₂S.
• Oxidation of sulfide and elemental sulfur (S) and related compounds to sulfate, SO₄²
• Reduction of sulfate to sulfide
• Microbial immobilization of the sulfur compounds and subsequent incorporation into the organic form of sulfur

Sulfur information...
• It is found on Earth as sulfates in rocks or as free sulphur
• Sulphur can occur in combination with several metals, including lead and mercury
• It appears as yellow aspects of soil in many regions
• Sulfur dioxide (SO2) is a bleaching agent
• SO2 is a colourless gas that creates a choking sensation when breathed. It kills moulds and bacteria. It is also used to preserve dry fruits.

Sulfur - the element
Sulfur is found in all of the earths environments, including the air; the hydrosphere or water, the biosphere, all the living things and the lithosphere containing the ground or rocks. (Question 2)
Many sulfates (a solid form of sulfur) come from the chemical weathering of minerals that contain sulfur. (Question 3)
the sulfur cycle
Sulfur in it's pure state is most often found near volcanoes. (Question 1)
Essential steps:
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