JEREMY BISHOP / SCIENCE PHOTO LIBRARY JEREMY BISHOP / SCIENCE PHOTO LIBRARY
Volcanic sulphur mining. Man mining solid sulphur (yellow) from Ijen volcano, Java, Indonesia. Molten sulphur (orange) is seen at lower right. The man is surrounded by volcanic sulphur gases that will include sulphur dioxide and the poisonous hydrogen sulphide. Elemental sulphur is a component of the magma (molten rock) that issues from volcanoes as lava. Sulphur boils at 445 degrees Celsius and melts at 113 degrees Celsius. The sulphur is mined for industrial uses, such as the production of fertilisers and dyes. It is primarily used, though, in the manufacture of sulphuric acid for further industrial uses. Photographed in 1999.
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