This activity suggests to use the Prussian Blue, also known as iron hexacyanoferrate, to absorb CRM ions from water. This pigment can in fact interact with metals such as Copper, Manganese and others.
Prussian Blue is one of the first synthetic pigments ever created. Thanks to its particular structure it can interact with CRM ions in order to capture them. Actually, it is also used in the pharmaceutical sector to soak up dangerous substances such as Cesium and Thallium in infected hosts. It can be synthesized in a laboratory or it can be purchased, therefore the synthesis is suggested to student over 16, while for younger students we only proceed with the recovery of metals from the water.
The toolkit was presented at the International Science Fair 2018 organized by Wetsus by six Young RM Ambassadors of high school “A. Sobrero” in Casale Monferrato (Italy), and awarded as the winning project.