Sulfur cycle


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Sulfur cycle

  1. 1. Reported by: Angela Ang Royce Bacelonia Jezzele Andres MM 201 Environmental Science (TTH 8:30 – 10:00)
  2. 2.  The sulfur cycle is the collection of processes by which sulfur moves to and from minerals (including the waterways) and living systems. Such biogeochemical cycles are important in geology because they affect many minerals.  Biogeochemical cycle or substance turnover or cycling of substances is a pathway by which a chemical element or molecule moves through both biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth.
  3. 3.  Biogeochemical Cycle- the cycle of matter through the Earth since:  All matter is conserved  All matter cycles (since none is destroyed)  Found in rocks or buried deep in the ocean in oceanic sediments.  found in the atmosphere.( enter through both natural and human sources.)
  4. 4.  - occurs in combination with several metals such as, PbS and HgS.  - a brittle yellow, tasteless and odorless non-metallic element.  10th most abundant element in the universe,  At room temp. it is a solid  Present in proteins, amino acids, vitamins, and enzymes, necessary for plants and animals
  5. 5.  important elements of industrial processes  Sulfur dioxide (SO2) is a bleaching agent and is used to bleach wood pulp  Sulfur dioxide kills molds and bacteria. (preserve)  Sulfur is found in every living cell (amino acids)  Long used as a medicine ( Brimstone in the old days)  Before the advent of antibiotics in the 1940s, sulfur-containing drugs-sulfa drugs-were commonly used to treat infectious diseases.  component of penicillin-class antibiotics  Medications for dandruff, and warts have this ingredient. Combining alcohol and sulfur can be used to treat acne and other skin disorders.
  6. 6. It is also use to make cements, matches, fireworks, dyes, fungicides. Powdered sulfur is found in lotions and skin cream ingredients.
  7. 7.  It includes both atmospheric and terrestrial processes  Hydrogen Sulfide (H2S) is released into the atmosphere (volcanic eruptions, fossil fuel burning, and the anaerobic decay of sulfur- containg biological material in swamps, bogs)  Certain marine algae  dimethyl sufide + Oxygen in atmosphere = Sulfur dioxide.  Volcanic eruptions  Sulfur dioxide  Burning of fossil fuels  Sulfur dioxide  Sulfur dioxide + Oxygen = Sulfur trioxide, then reacts with tiny water droplets = Sulfuric Acid  Sulfur Oxides reacts with Ammonia = tiny particles of ammonium salts.  Wind carries Sulfuric acid and ammonium salts which falls to earth in form of Precipitation.  Plants get sulfur by taking up ions of sulfate salt from the soil.  Animals get sulfur by eating plants and all living things release sulfur compounds when they decay.
  8. 8.  Decomposition releases sulfate salts (SO4 2-), which can be taken up by plants as well as gaseous hydrogen sulfide.  Some hydrogen sulfide enters the atmosphere. But when decay occurs in an oxygem-free environment, anaerobic bacteria break down hydrogen sulfide and release sulfur gas (H2)  Oxygen-requiring bacteria can incorporate sulfure into sulfate salts which can be taken up by plants and enter the food chain once again.  The remaining sulfur is lost into the oceans depth combining with iron to form Ferrous Sulfide which is responsible for the black color of most marine sediments.
  9. 9.  We burn sulfur containing coal and oil to produce electricity. We refine sulfur containing petroleum.  Acid rain is corrosive rain caused by rainwater falling to the ground through sulfur dioxide gas, turning it into weak sulfuric acid, which causes damage to ecosystems.
  10. 10.  Energy conservation
  11. 11.  Transportation - cars are a major contributor to acid rain pollution,  Alternative fuels - switch over to renewable sources of energy, (solar, wind and water energy)