1. Sulfur

2. Physical - chemical properties
Chemical symbol S, (Sulphur)
Atomic number : 16
Ar: 32,065
Density 1,960 g/cm3
Melting point: 115, °C - 388,4 K
Boiling point: 444,67 °C - 717,87 K

3. Structure

4. History
Sulfur was known in ancient times, and is referred to in the Bible.
Early alchemists gave sulfur its own alchemical symbol which was a triangle at the top of a cross.
In 1867 sulfur was discovered in underground deposits in Louisiana and Texas.

5. Biological role Sulfur is found in: amino acids -cysteine methionine
polypeptides
proteins
enzymes
cells
DNA
bacteria

6. Applications Sulfur is used in: batteries detergents
vulcanization of rubber
fungicides
manufacture of phosphate fertilizers
bleaching paper
preservative in wine and dried fruit
gunpowder
fireworks
photographic fixing agents
laxative
exfoliant

7. Damage to the natural environment and chemical weathering
Environmental Impact
Industry
Sulfur dioxide SO2
Acid rain
Damage to the natural environment and chemical weathering

8. Occurrence in earth’s crust (0,03 - 0,09 %)
in oceans and seas (csulfur = 900 mg/l)
in the universe (1 atom of sulfur come to atoms of hydrogen)
in volcanic regions and hot springs
In ores: pyrite (iron sulfide), cinnabar (mercury sulfide), galena (lead sulfide), sphalerite (zinc sulfide) and stibnite (antimony sulfide), gypsum (calcium sulfate), barite (barium sulfate)
spring – pramen, vřídlo

10. Sulfur in other languages
english: sulfur
latin: sulphur
czech: síra
croatian: sumpor
french: soufre
german: dchwefel
italian: solfo
norwegian: svovel
portuguese: enxôfre
spanish: azufre
swedish: svavel

11. References: http://en.wikiedia.org./wiki/Sulfur

12. Thank you for your attention!
Presentation was prepared by:
Eva Jochimová
Helena Šmídová
Brno University of Technology