What is The Difference Between Reverse Osmosis and Deionized Water Purification

We will be talking about the different water filtration systems you can use for your home to get the purest drinking water possible. These systems we will be talking about are Reverse Osmosis System and Deionized Water Filters. So, what are these purification methods and what is the difference between them?

The difference between reverse osmosis water and deionized water is the level of purity that is happening. With water going through the process of reverse osmosis and a reverse osmosis purification. The resulting product water that is left for drinking is cleansed of solids but still saturated with salts and oxygen.

Deionized water produces the final product of ultrapure water by removing these salts and oxygens, but the deionized process does not remove the dissolved solids found in the water. This is why it is common for them to be used together as it will guarantee removing of at least 95% of the impurities in your drinking water.

Let’s begin to understand how this works with some quick definitions.

Reverse Osmosis

What is Reverse Osmosis and RO Water?

Reverse Osmosis System (RO): Reverse Osmosis is one of the most efficient and modern water purification technologies available right now. Originally designed to filter salt out of ocean water it now filters most known water impurities found in municipal tap water.

Through the use of carbon filters, reverse osmosis membrane and the use of high-pressure this system will allow you to remove 90-95% of all total dissolved solids in your drinking water.

Reverse Osmosis Systems are excellent in removing impurities in your drinking water which include:

  • Organic Chemicals
  • Chlorine
  • Lead
  • Silicates
  • Pesticides
  • Herbicides
  • Arsenic
  • Asbestos
  • Radionuclides
  • Cysts

How does an RO System Work?

The process starts with a pre-cleaning that removes particles from the water. Once the water passes the pretreatment, it will then be handled by the reverse osmosis membrane. Pressure gauges are used to measure the inlet and outlet pressures. These gauges will permeate water that is cleaned and stores it for future use, the water that does not pass this process is recycled.

The reverse osmosis process uses very fine filters. Water passed with high pressure through the membrane; the membranes pores are so small that only pure water can pass through. Leaving bigger particles like lead and silicates to be left behind from the water during this filtration process.

If you had to choose one between reverse osmosis filters or deionized filters, then sticking with the reverse osmosis purification will be the better choice because it removes most of the contaminants in your drinking water. The deionization filter by itself will require too much maintenance and constant changing of the filter.

Deionized Water

What is Deionization and DI Water?

Deionized Water Purification (DI): Deionized water is water that goes through the process of removing ions from it. This water is passed through a deionized reaction. Here, dissolved particles in the water are chemically removed through deionization. 

Deionized water removes the impurities that are ionically dissolved into the water; this system will remove impurities from the water molecules themselves. For example: when sugar or salt is dissolved in water, the sugar or salt will attach itself to the water’s molecules electronically or ionically.

Learn more about the exact science of deionized water

Deionized Filters are used to clean up the molecular impurities of your drinking water which include:

  • Dissolved Salts
  • Calcium Ions
  • Magnesium Ions
  • Metallic Ions

Your DI water will replace these impurities with hydrogen ions in your water. Deionized water is as pure if not sometimes purer than distilled water, which is also a form of water purification done through boiling and steaming. DI water working in conjunction with an RO system is what gives the potential of DI water to be cleaner than distilled water. The RO system conducts a pre-cleaning of the water, and the DI system finishes the already 90-95% drinking water of all remaining harmful substances.

Distillation, Reverse Osmosis, and Deionization processes are intended to purify the water of the contaminants: mercury, lead, strontium, nitrates, phosphates, manganese, as well pesticides.

There is much controversy about minerals in our drinking water.  As a species, humans evolved consuming surface water found in streams, rivers, and lakes. Surface water is naturally low in minerals.  When humans developed irrigation techniques and started digging deep wells, they tapped into groundwater which has a much higher mineral content.

These minerals exist in a form and quantity that the body cannot easily absorb. Consequently, they tend to build up in the organs and tissues, instead of being utilized by the body.

If you’re looking to dramatically improve your home filtration a reverse osmosis filter may be right for you. Talk first with one of our competent plumbing technicians to determine the best water filtration system for your home.

Benjamin Franklin Plumbing Bay Area offers clean drinking water solutions with our home filtration systems and softeners.