Los Angeles uses an iron-based coagulant. The precipitate looks like rusty iron and can be used in road construction. You can recognize it by the color. When driving on the 405 from UCLA to SFV, look east at the hillside near Sunset exit
Dr Grace S Peng
Phosphate removal and sequestration is done in wastewater treatment and to manage recreational and drinking water lakes and reservoirs all the time. A water treatment coagulant is all you need to achieve this. These are typically aluminum (or sometimes ferric) based coagulants that are used to 14/19
