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Sulfur cycle

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DeAndrea Crockwell

on 9 October 2012

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Transcript of Sulfur cycle

Pathway of Movement The Sulfur Cycle Most of the earth's sulphur is tied up in rocks and salts or buried deep in the ocean in oceanic sediments. Sulphur can also be found in the atmosphere. It enters the atmosphere through both natural and human sources. Natural recourses can be for instance volcanic eruptions, bacterial processes, evaporation from water, or decaying organisms. When sulphur enters the atmosphere through human activity, this is mainly a consequence of industrial processes where sulphur dioxide (SO2) and hydrogen sulphide (H2S) gases are emitted on a wide scale.
When sulphur dioxide enters the atmosphere it will react with oxygen to produce sulphur trioxide gas (SO3), or with other chemicals in the atmosphere, to produce sulphur salts. Sulphur dioxide may also react with water to produce sulphuric acid (H2SO4)
Sulfur also occurs in combination with several metals such as lead and mercury, as PbS and HgS. Sulfur appears as the yellow aspects of soil in many regions.
Sulfur is released into the atmosphere through the burning of fossil fuels --especially high sulfur coal--and is a primary constituent of acid rain. Sulfur Most sulfur stored is stored in rocks and minerals ( this includes sulfate salts under ocean sediments) -It is also released in Hydrogen sulfide (H2S) by active volcanoes and by decomposers Sulfate salts (SO4 2-) - sea spray
- dust storms
-forest fires Marine algae produce dimethyl sulfide (CH3SCH3) In oxygen-deficient environments ,sulfate ions are converted to sulfide ions by bacteria - This is turned into acid rain through the water cycle - These react with metal ions to form insoluable metallic sulfide which are desposited in rocks What does Sulfur look like? Everything in the text under the section for your cycles. Chemical reactions The sulphate compounds dissolve very well in water and come down with the rain, either as salts or acids rain. One example is when sulfur compounds move from the ocean to the atmosphere, and are transported to the land. Once they have came down with the rain they are transported by rivers to the ocean. In chemical cycles, sulfur is usually oxidized in the air for organic sulfur or elemental sulfur and ends up as sulfate salts M(II) S04,M(I) H2SO4 or sulfric acid H2SO4. Volcano emissions Aerosol formation ammonia salts Acid rain Atmospheric oxidation Power plants Human Emissions Heating Ships Factories SO2 emission filter technologies Chemical reactions Impact of human intervention in the sulfur cycle. Inorganic and organic reservoirs for Sulfur Bibliography http://2.bp.blogspot.com/-XZOSRYNlaIo/Tcl-B8H3LNI/AAAAAAAAADs/BSVK4phrnIY/s1600/uesc_07_img0425.jpg http://www.networlddirectory.com/images/blogs/10-2006/ocean-sulfur-7691.jpg http://www.angelo.edu/faculty/kboudrea/molecule_gallery/element016_sulfur/sulfur_roll_02.jpg http://www.clas.wayne.edu/multimedia/usercontent/Image/Geology/gel_1010/SulfurXtls2.gif Inorganic Reservoirs of sulfur:
• The largest physical reservoir is the Earth's crust.
-Fossil fuels
-Acid rain
-Deep ocean rocks
-Volcanic eruptions Organic Reservoirs of sulfur :
-Bacteria http://www.lenntech.com/images/sulfcycle.gif Since the Industrial Revolution, human activities have contributed to the amount of sulfur that enters the atmosphere, primarily through the burning of fossil fuels and the processing of metals.
We burn sulfur-containing coal and oil to produce electric power.
We refine sulfur-containing petroleum to make gasoline, heating oil, and other useful products.
We convert sulfur-containing metallic mineral ores into free metals such as copper, lead, and zinc. Mining erosion (exposure of mineral sulfides)
Emissions from these, along with nitrogen emissions, react with chemicals in the atmosphere such as sulfate salts and acid rain. Sulfate salts and acid rain damage the natural environment(affects both plants and animals) as well as man-made environments weathering/corrosion of buildings Dry deposition effect humans by irritating the respiratory tract, from the nose it then moves into the lungs and attacks sensitive tissues. High concentrations have caused a number of air-pollution disasters characterized by higher than expected death rates and increased incidences of bronchial asthma. Some effects cause major damage to vegetation in areas surrounding the source of emission. It can injure or kill exposed plants. Acidic aerosols present during periods of fog, light rain and high relative humidity together with moderate temperatures do the injury. Wet Deposition Dry Deposition http://1.bp.blogspot.com/-nJSKOjOoQIs/T8IGhjZdg7I/AAAAAAAAAMA/U_553q87ry4/s320/inhaler-SPL.jpg http://www.nrdc.org/air/images/feature-main-air.jpg http://youtu.be/k2XV8GSyYcY. Dorian Brandon DeAndrea Crockwell Colton Phillips Jacob Travis Angel Crespo BY:
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