Conversion of pollutants to fertilisers: ion exchange synthesis of potassium sulphate from acidic mine waters

摘要

The paper reports the results obtained by the development of ion exchange synthesis of K_2SO_4 from the natural acidic mine waters (AMW) of Rio Tinto area (Huelva, Spain). The process flowsheet includes several sequential stages permitting production of potassium sulphate and desalinated water along with the recovery of four metals.