Question/Answer session about water purification

Ans

Ans

by Md.Rakibul Hasan Zihad -
Number of replies: 0

f we want to use hard water in textile dye processing first off all we need to remove the hardness of water. There are two types of hardness  (a) Temporary hardness, (b) permanent hardness.

Temporary hardness:

1. Ca(HCO3)+ Ca(OH)→ 2CaCO3 ↓ +2H2O

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

     MgCO+ Ca(OH)2 → Mg(OH)2 + CaCO3 

Permanent Hardness:   

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