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Fly ash, SEM

Fly ash, SEM

C016/7049

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Credit

DAVID SCHARF / SCIENCE PHOTO LIBRARY DAVID SCHARF / SCIENCE PHOTO LIBRARY

Caption

Fly ash. Coloured scanning electron micrograph (SEM) of coal fly ash. Fly ash is part of the non-combustible waste residue produced in the furnace of coal-fired power stations and is light enough to go up the flue or chimney. All fly ash particles contain silicon dioxide (SiO2) and calcium oxide (CaO). Coal ash particles may contain large quantities of toxic metals, including mercury, arsenic, beryllium, cadmium, chromium, nickel, and selenium. It can also be recycled and used as an additive for concrete, cinder blocks, and asphalt. Magnification: x5160, when printed 10 centimetres wide.

Release details

Model release not required. Property release not required.

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