885MTAMount DMU University Bachelor's Diploma in Education
Sulfur
1. SULFUR CYCLE
CREATED BY:
Dita Kesuma Dewi Nur Khamiliah
Sariti Nur Hasanah
Mahmudah Bunga Surya
Danifatus Zakiyah Zia Azizah Salama
Kharisma Mutmainnah
http://www.free-powerpoint-templates-design.com
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SULFUR
All about sulfur
DEFINITION OF SULFUR CYCLE
What is sulfur cycle?
EFFECT OF SULFUR CYCLE
Effect of sulfur cycle on nature
PROCESSES OF SULFUR CYCLE
How the sulfur cycle works
4. What is Sulfur?
Sulfur (S symbol) or sulfur is a multivalent, tasteless and odorless non-metal
element. The amount of sulfur valence (from S2- to S6 +) allows sulfur to par
ticipate in various geochemical and biochemical processes.
Sulfur. Chemical element that is one of the constituents of the Earth’s compa
rtments and living organisms. While the average sulfur content of the whole
Earth is about 2%, the crust contains only about 0.07% sulfur
“ “
5. Sulfur Properties
Pure sulfur is a yellow solid
Melting point: 115,21 ° C, 239,38 ° F
Boiling point: 444,6 ° C, 832,3 ° F
At specific temperature and conditions,
in combination with water, this material
produces sulfuric acid which is highly
corrosive.
Highly Corrosive
its viscosity suddenly increases at
160°C.
High viscosity
At high temperatures, sulfur produces
toxic gases such as SO2
Toxic gases
Sulfur does not dissolve in
water
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Under standard conditions Solid sulfur
is a pale yellow solid. It is soft and
odorless.
6. Definition
of Sulfur
Cycle
Sulfur cycle. Biogeochemical system of
biotic and abiotic transformations of
inorganic and organic sulfur-bearing
components, in and between, the lithospher
e, hydrosphere, atmosphere, and biosphere.
Sulfur initially enters the biogeochemical
cycle via volcanic activity and continental
erosion. Today, the modern sulfur cycle is
influenced by human activity. The Earth
sulfur reservoir is assumed to have been
essentially constant through time
7. Processes of Sulfur Cycle
In the sulfur cycle, to convert sulfur into other sulfur
compounds there are at least two types of processes
that occur, namely through the reaction between
sulfur, oxygen and water and by microoganism.
Conceptual model for the sulfur cycle (at the
beginning of the archaean and still occurs today), that
sulfur dioxide (SO2) and hydrogen sulfide (H2S) are
released from volcanoes and modified by ultraviolet
radiation and stored on the surface of the reservoir as
aerosol and finally recycled into the Earth's mantle.
10. Steps of Sulfur Cycle
When organisms die, some of the
sulfur is released back to
sulfate and enter microorganisms
..
The cycle begins with the weathering of rocks,
which releases stored sulfur.
Sulfur comes into contact with t
he air, converting it to sulfate
(SO4).
Sulfate is taken up by plants an
d microorganisms and is
changed to organic form.
Sulfur moves up the food chain.
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11. Steps of Sulfur Cycle
Remaining sulfur go to ocean floor
and form ferrous sulfide, which is
responsible for the black color
of most marine sediments.
Natural sources emit sulfur into
the air.
Sulfur eventually settles back to
the Earth or comes through rain
fall, with some also going to the
ocean.
Sulfur is also drained to rivers a
nd lakes, eventually to the ocea
ns.
Some of the sulfur from oceans
go back to the atmosphere thro
ugh the sea spray.
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12. Effect of Sulfur Cycle
on Nature
A B
C DSO2 gas can react chemically
with oxygen, dust particles
and water to form volcanic
smog
Sulfur Cycle does not allow acid
rains because it regulates the
amount of sulfur present in the
atmosphere, hydrosphere, and
lithosphere
Volcanoes release large amo
unts of sulfur dioxide gas
(SO2) into the atmosphere
Natural weathering of rocks,
land forms, etc.
13. References Brimblecombe, P., 2003. The global sulfur cycle. In Schlesinger, W. (ed.)
, Treatise on Geochemistry, Biogeochemistry. Amsterdam: Elsevier, Vol. 8,
pp. 645.
Farquhar J., Wing B. 2003. Multiple Sulfur Isotopes and Evolution of the
Atmosphere. Elsevier Science BV. Earth and Planetary Science Letters. 6
707:1-13.
Garrels, R. M., and Lerman, A., 1984. Coupling of the sedimentary sulfur
and carbon cycles – an improved model. American Journal of Sciences, 2
84, 989.
Mandeville C. 2010. Sulfur: a Ubiquitous and Useful Tracer in Earth and Pl
anetary Sciences. Dept.of Earth and Planetary Sciences.American Museu
m of Natural History Central Park.NewYork.Elements. 6: 75-80.
Rezvani, Vahid., and Hassan, Saghi., 2015. Characteristics and Preparati
on Method of Sulfur Extended Asphalt Mixtures. American Journal of Civil
Engineering. 3(2-2): 69-74
