4 HistorySulfur 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 polypeptidesproteinsenzymescellsDNAbacteria
6 Applications Sulfur is used in: batteries detergents vulcanization of rubberfungicidesmanufacture of phosphate fertilizersbleaching paperpreservative in wine and dried fruitgunpowderfireworksphotographic fixing agentslaxativeexfoliant
7 Damage to the natural environment and chemical weathering Environmental ImpactIndustrySulfur dioxide SO2Acid rainDamage 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 springsIn 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