Question/Answer session about water purification

If you want to use hard water for your textile dye processing, how can you treat that water before use?

If you want to use hard water for your textile dye processing, how can you treat that water before use?

by Ripon Ahmad -
Number of replies: 0

Answer: if I want to use hard water for my textile dye processing fristy we need hardness of water.

water hardness are two type:

1)temporary hardness: temporary hardness is removed by boiling water and chemical reaction.

2)parmanent hardness: parmanent hardness is removed by only chemical reaction.

I given reaction of temporary hardness and parmanent hardness in the below:

Temporary hardness:

1. Ca(HCO3)2 + Ca(OH)2 → 2CaCO3 ↓ +2H2O

2. Mg(HCO3)2 + 2Ca(OH)2 → 2MgCO3 +2H2O

     MgCO3 + Ca(OH)2 → Mg(OH)2 + CaCO3 

Permanent Hardness:   

  1. CaSO4 + Na2CO3 → CaCO3+ Na2SO4    
       2. MgSO4 + Na2CO3 → MgCO3+ Na2SO4  
           MgCO3 + Ca(OH)2 → Mg(OH)2 +  CaCO3