During the water treatment process what drops out of the water when iron is added to it?

Question

anonymous · Answer

Could you rephrase the question? It doesn't really make any sense. :(

anonymous · Answer

http://en.wikipedia.org/wiki/Water_treatment Water purification is the removal of contaminants from untreated water to produce drinking water that is pure enough for the most critical of its intended uses, usually for human consumption. Substances that are removed during the process of drinking water treatment include suspended solids, bacteria, algae, viruses, fungi, minerals such as iron, manganese and sulfur, and other chemical pollutants such as fertilisers.