Occlusion (chemistry)
The inclusion of foreign substances in the precipitate that occurs during precipitation is called occlusion . The foreign matter can be incorporated into the resulting crystallites as a solid solution or mixed crystal, adsorb on the surface of the finest crystallites or be entrained in amorphous precipitates (flocculation). Occlusion is undesirable in precipitation analysis ( gravimetry ), as it separates soluble substances together with the desired precipitate.
Even in the case of precipitation reactions in wastewater pretreatment plants, the removal of pollutants takes place in part as part of occlusion processes.
literature
- Entry on occlusion. In: Römpp Online . Georg Thieme Verlag, accessed on December 29, 2014.
Web links
Wiktionary: occlusion - explanations of meanings, word origins, synonyms, translations
Individual evidence
- ↑ G. Jander, E. Blasius: Textbook of analytical and preparative inorganic chemistry, 12th edition, S. Hirzel Verlag, Stuttgart 1983, p. 98
- ↑ Guide to reducing phosphorus input from sewage treatment plants by the Thuringian Ministry of Agriculture, Nature Conservation and the Environment, p. 27 (PDF; 4.4 MB)