How does zeolite ion exchange ions?
In zeolite softening, water containing scale-forming ions, such as calcium and magnesium, passes through a resin bed containing SAC resin in the sodium form. In the resin, the hardness ions are exchanged with the sodium, and the sodium diffuses into the bulk water solution.
Why ion exchange process is better than zeolite process?
Since the zeolite process utilizes the mineral zeolite as the exchanging resin for only cation in hard water, and synthetic resins method utilizes many different resins for the ion exchange, hence, it is more efficient.
What is zeolite ion exchange?
Ion-exchange is used extensively in small water systems and individual homes. Ion-exchange resin, (zeolite) exchanges one ion from the water being treated for another ion that is in the resin (sodium is one component of softening salt, with chlorine being the other).
What exchange takes place in zeolite process?
In which process of water softening, ion exchange phenomenon takes place? Explanation: In the zeolite process, calcium and magnesium are removed from hard water by ion exchange phenomenon.
What is the principle of zeolite process?
Principle- Zeolite is micro-porous mineral which is used as catalyst in many industrial purposes such as water purification and air purification. Advantages- It removes the hardness almost completely (about 10 ppm hardness only). The process automatically adjust itself for variation in hardness of incoming water.
What is the process of zeolite?
i. A base exchange method of treating hard water, in which zeolites, contained in a tank, remove salts. The zeolite layer is regenerated by backflushing with brine.
How does ion exchange process work?
The ion exchange chemical process works by removing dissolved ionic contaminants from the water. These ions are swapped for better ones that won’t degrade the quality of your water. Water softeners are very similar to ion exchange systems since both systems can remove magnesium and calcium ions from the water.
Which ions Cannot be treated in zeolite process?
Limitation of Zeolite Process: If water contains large quantities of coloured ions such as Mn2+ and Fe2+, they must be removed first, because these ions produce manganese and iron zeolites, which cannot be easily regenerated.
What is disadvantage of zeolite process?
Disadvantages of Zeolite Process: The treated-water contains more sodium salts than in lime-soda process. High turbidity water cannot be treated efficiently by this method, because fine impurities get deposited on the zeolite bed, thereby creating problem for its working.
How is sodium and magnesium exchanged in zeolite?
Zeolite resin exchanges sodium for calcium and magnesium. The following chemical reactions show the exchange process, where X represents zeolite, the exchange material. Removal of carbonate hardness: Ca(HCO 3) 2 + Na 2X ——> CaX + 2NaHCO 3 Mg(HCO 3) 2 + Na 2X ——> MgX + 2NaHCO 3 Removal of non-carbonate hardness: CaSO 4 + Na
How is the Softener of zeolite ion exchange softened?
Once hardness breaks through, the softener must be regenerated. In down-flow units, the resin must first be backwashed to loosen the resin (it becomes compacted by the weight of the water), and to remove any other material that has been filtered out of the water by the resin.
What’s the difference between anion exchangers and zeolite?
The equipment that we use for this purpose is ion exchangers. Cation exchangers – use zeolite, greensand, sulfonated coal, etc. as the exchanging material. Anion exchangers – uses metallic oxides, synthetic resins, etc. The materials we use in cation exchangers include either weak acids or strong acids.
How is the zeolite process related to hard water?
Furthermore, the zeolite process is a form of ion exchange process of softening hard water. Hard water is the water that is rich with calcium or magnesium cations. The presence of these cations in water may cause difficulties such as decreasing the effectiveness of nearly any cleaning task via reacting with heat, metallic plumbing or detergents.
