Diatomaceous earth is very popular material these years.
Diatoms are tiny, single-celled algae found in plankton in ocean. Diatoms accumulated after they died, then fossilized into diatomaceous earth after hundreds of millions of years. The main components are silicon dioxide, light and porous. Electron microscope shows that diatomaceous earth is nanoscale porous material with diameter at 0.1-0.2 micrometers, the porosity is up to 90% and the pores are regularly organized into circles and its micropores quantity in unit area is several thousands times of active carbon's.
Such unique molecular characteristics contributed to the excellent function of diatomaceous earth.
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