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flocculation
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flocculation

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thumb|4x speed video of floc settling after adding flocculant polymers during a jar test.

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  • Jar test
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thumb|4x speed video of floc settling after adding flocculant polymers during a jar test.

In colloidal chemistry, flocculation is a process by which colloidal particles come out of suspension to sediment in the form of or flake, either spontaneously or due to the addition of a clarifying agent. The action differs from precipitation in that, prior to flocculation, colloids are merely suspended, under the form of a stable dispersion (where the internal phase (solid) is dispersed throughout the external phase (fluid) through mechanical agitation) and are not truly dissolved in solution.

Excerpted from Wikipedia’s “flocculation” article, available under the CC BY-SA 4.0 licence.

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