Question

Write the limitations of zeolite process.

Answer 1

Turbid water cannot be used-the suspendedimpurities will clog the pores of zeolite

• Mineral acids should be removed/neutralized –mineralacids destroy the zeolite

• If water contains large amounts of coloured ions suchasMn2+andFe3+, it must be pretreated because thecorresponding manganese and iron zeolite cannot beeasily regenerated

•Zeolite treatment replaces only the cations like Mg2+and Ca2+, leaving all the anions like HCO3-and CO32-in thesoft water

•HCO3-ions will decompose in boiler and release CO2-corrode the boiler