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Chemical coagulation and flocculation

Learning targets
Chemical coagulation and flocculation The primary purpose of chemical coagulation is to neutralise the electrical charges on the particles and hence prevent repulsion. This generally means adding metal cations because the suspended organic material is almost always negatively charged. In most cases, the coagulant itself also precipitates out (for example, as the hydroxide), making the
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This page has been updated 29.10.2020
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