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SEM of filter paper clogged with soil particles

SEM of filter paper clogged with soil particles

H100/0358

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52.6 MB (3.8 MB compressed)

5007 x 3673 pixels

42.4 x 31.0 cm ⏐ 16.7 x 12.2 in (300dpi)

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Credit

DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY

Caption

Scanning electron micrograph of standard filter paper clogged with silt particles after soil- contaminated water had been passed through it. Filter paper is used to separate the liquid from the solid parts of a suspension. It is made from wood pulp (in particular that obtained from spruce, poplar, pine and fir trees), hence the presence of the cellulose fibres seen here under the silt. Soil contains gravel, sand, silt & clay. Most of the particles here are silt, with a size range of 2 to 50 micrometres. Gravel & sand would be unlikely to stay suspended in water anyway, while, at this magnification, the clay is probably invisible. Magnification: x250 at 8x10 inch size.

Release details

Model release not required. Property release not required.

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