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 Emran hosen ID-201-23-782 -
Number of replies: 0

It you want to use hard water for my textile dye processing.then the hardness of water should be removed.The removing process is:

1.Temporary hardness: IS caused by calcium and/or magnesium hydrogen carbonate.These are formed as carbonate rain water passes over rocks containing carbonate ions,for example


H2O(I)+CO2(g)+CaCO3(s) →   Ca(HCO3)2(aq)

H2O(I)+CO2(g)+MgCO3(s)→Mg(HCO3)2(aq)


Temporary hardness can be removed simply by boiling the water.

2.Permanent hardness:Is caused by calcium and/or magnesium sulphate.These are formed as water passes over rocks containing sulphate ions,for example


aq.+CaSO4(s)→ Ca2+(aq)+SO42-(aq)


aq.+MgSO4(s)→Mg2(aq)+SO42-(aq)


Parmanent hardness cannot be removed by boiling but can often be removed by chemical treatment.....