Arsenic Coal Ash (IMAGE)

Duke University

Arsenic Coal Ash

Caption

A nanoscale view of two different sources of coal ash shows major differences in how arsenic is part of its makeup. On the left, arsenic atoms (red) coat the surface of a coal ash particle made mainly of iron (green). On the right, the arsenic is encapsulated within the iron particle, making it more difficult for the arsenic to escape.

Credit

Helen Hsu-Kim, Duke University

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