Temporary and permanent hardness of water is removed by -
REMOVAL OF HARDNESS: Temporary hardness: Boiling Addition of lime Addition of sodium carbonate Permutit process (Na2 Al2 SiO2 H2O) Permanent hardness: Addition of sodium carbonate Base exchange process (permutit process) Park's Textbook of Preventive and Social Medicine, 25th edition, Page No. 787
Boiling
Addition of lime
Permutit method
All
Environment and health