Deionized Water VS Distilled Water: What’s the Difference?

Water is a resource used daily around the world. Have you heard of distilled and deionized water? Do you know the differences between the two? The distinctions between distilled water and deionized water will be covered in this blog post. Read on to discover more!

7.deionized Water and Distilled Water

1. Is Deionized Water The Same As Distilled Water?

No. Deionized water and distilled water are both indispensable solvents in the laboratory. However, there are obvious differences between the two in terms of manufacturing methods, ingredients, purity, etc. Generally speaking, distilled water has a higher ion content than deionized water. If it is deionized without UV disinfection or filter membrane, it may contain some microorganisms.

2. What is Distilled Water?

Have you ever wondered what distilled water is? Distilled water is water that has been heated to its boiling point, causing any impurities to evaporate. The resulting vapor is then condensed back into a liquid, leaving behind any contaminants. This process of distillation can be used to produce drinking water, as well as water for other purposes.

Water that has been distilled is completely free of contaminants and minerals, making it ideal for use in medical settings or by people with sensitive skin or allergies. Furthermore, because of its purity, distilled water can be stored for an extended period of time, ensuring safe water for use.

Due to the absence of dissolved minerals, distilled water is frequently utilized in steam irons and other equipment where mineral buildup might be problematic. Given that the distillation process removes some minerals from water, it is desirable to add mineral supplements to produce drinkable and healthful drinking water.

2.1 How to Maker Distilled Water?

As a result of the distillation process, only the purest water molecules—and any impurities or contaminants—come to the surface of the boiling water as vapor. Components removed from water during the distillation process can include minerals, chemicals, and other pollutants. To keep the accuracy of their research observations, the majority of medical facilities and testing facilities need to practice strict sanitation. For this, water with a high level of purity, like distilled water, is frequently used. It is also popular for drinking and cooking, as it can improve the taste of food and beverages.

Figure 2 Distillation process.

Certain water components extracted during the distillation method are:

      • Toxic pollutants
      • Residual wastes
      • Both organic and inorganic molecules
      • Heavy metals and cysts
      • Harmful bacteria and viruses

2.2 Is Distilled Water Safe to Drink?

Distilled water is relatively pure hygienic water and is safe to drink. However, many minerals needed by the human body are also lost during the distillation process. Drinking large amounts of distilled water for a long time will harm human health and may cause symptoms such as chest tightness, nausea, diarrhea, physical decline, and irritability. Therefore, distilled water is often used to prepare pharmaceuticals and chemical reagents, and is not recommended for use as drinking water.

2.3 Where Can Distilled Water be Used For?

Distilled water has a wide range of applications. Common applications include:

– Electronics industry production: ultrapure water is required for manufacturing processes such as semiconductors, circuit boards, and integrated circuit chips.
-Power industry and factory enterprises: softened water and demineralized water are required for power generation boilers, and medium and low-pressure boiler water supply.
-Pharmaceutical industry: used to manufacture medical infusions, pharmaceuticals, injections, biochemical products pure water, medical sterile water, and pure water for artificial kidney dialysis.
-Beverage industry: used as pure water for blending in wine production, as well as water for beer saccharification and pure draft beer filtration.
-Optical glass and coating process: pure water and ultrapure water before cleaning.
-Electroplating process and surface treatment: used for deionized water and pure water for cleaning, as well as pure water for surface coating and cleaning of automobiles, home appliances, and building materials products.

Reverse Osmosis In Laboratory Water Purification Systems

3. What is Deionized Water?

Regarding water, there are numerous phrases in circulation. You may be familiar with distilled water and spring water. What about deionized water, though? Deionized water is distilled water from which all contaminants have been removed. This results in the removal of dissolved minerals and salts. DI water is not the same as distilled water, which has had all its impurities removed through a distillation process.

Most commercial and manufacturing industry uses DI water to avoid the potential of sediment build-up that could affect the longevity of their equipment. Additionally, because DI water does not conduct electricity, it can be used safely in electrical applications. The following are the standards for deionized water:

Resistivity MΩNaN.(25℃) 18(minimum 17) 15(minimum 12) 10(minimum 8) ≥2 ≥0.5
Number of particles larger than 1μm 1 5 10 100 500
Number of particles larger than 0.5μm 100 300 500 1000 2000
Number of bacteria, maximum number/mL 1 5 10 50 100
Total organic carbon content, max. 50 100 200 1000 1000
Total silica content, max. 2 20 50 100 1000
Chlorine content, max. 0.5 2 10 100 500
Copper content, max. 0.2 2 5 50 500
Potassium content, max. 0.5 5 10 100 1000
Sodium content, maximum 0.5 6 10 200 500
Zinc content, max. 0.2 2 10 100 500
Aluminum content, max. 0.5 5 10 100 500
Iron content, max. 0.5 5 10 100 500
Calcium content, max. 0.5 5 10 100 500

There are a few different ways to deionize water, but the most common method is using an ion-exchange process. This process involves exchanging the ions in the water with ions from a resin. The resin is then able to remove the minerals and salts from the water, leaving behind pure water.

Deionized water is an extremely versatile substance and has a wide variety of uses. Some of the most common uses for DI water include:

      • Cleaning electronic equipment
      • Preparing solutions for scientific experiments
      • Watering plants
      • Cleaning windows
      • Making baby formula

If you intend to use deionized water, there are a few things to consider.

      • First, it can be very aggressive and corrosive because it does not contain any minerals or ions. This means that it can potentially damage certain types of materials, so it is important to do your research before using DI water on any surface.
      • Additionally, because it does not contain any impurities, DI water can also be very pure and may not be suitable for human consumption.

3.1 How to Make Deionized Water?

By running water through a deionization resin, minerals, and other contaminants, including ionic compounds, are removed. It can also be used to remove salt from seawater or brackish water, making it appropriate for industrial or agricultural applications. The charged beads in the resin attract and bind to the ions in the water. Once the ions are attached to the beads, they can be extracted from the water via a regeneration process. The beads are regenerated by flushing them with chemicals that remove the ions. The deionized water is subsequently filtered to remove any leftover contaminants.

Figure 4 Deionization process.


The types of deionization:

      • Ion-exchange: Tap water ->multi-media filter -> activated carbon filter ->precision filter -> positive bed -> negative bed -> mixed bed -> post-security filter -> water point.
      • RO+DI system: Tap water -> multi-media filter-> activated carbon filter ->precision filter -> reverse osmosis equipment -> mixed bed -> water tank -> post-security filter -> water point.
      • RO+EDI system: Tap water -> multi-media filter->activated carbon filter ->precision filter-> reverse osmosis equipment ->electrodeionization (EDI) -> water tank -> post-security filter -> water point.

EDI system

3.1.1 What is an EDI System?

Electrodialysis uses an electric current to separate ions from water, while ion exchange uses chemical reactions to swap ions between the water and an ion-exchange resin. Both methods are effective at removing dissolved ions from water, but each has its own advantages and disadvantages.

Electrodialysis is typically used to deionize large volumes of water, such as seawater or brackish water. This method is very effective at removing dissolved ions but is also expensive and requires a lot of energy to operate. Ion exchange is typically used to deionize smaller volumes of water, such as drinking water. This method is less expensive and uses less energy than electrodialysis, but it is not as effective at removing dissolved ions.

Figure 5 Schematic diagram of electrodialysis desalination process.

Deionization can be used to purify both fresh water and salt water. This process is important for making safe drinking water, but it also has many other applications in industry and agriculture. Deionization can be used to remove minerals from boiler feedwater, make ultrapure water for electronics manufacturing, and purify water for agricultural use. This process is also used in the desalination of seawater, which is a process that converts salt water into fresh water.

3.2 Can You Drink Deionised Water?

Deionized water is relatively pure and can be drunk. However, it has no nutritional content, and long-term consumption will cause the body to lose inorganic salts. Because the deionization process also removes mineral ions that are beneficial to the human body, such as magnesium, sodium, and calcium. Deionized water can also easily cause bacterial growth after storage.

3.3 Where Can Deionized Water be Used For?

Deionized water has high purity does not contain harmful substances, and can be used in the production processes of pharmaceuticals, electronics, cosmetics, and other industries. Able to ensure product quality and safety.
In addition, deionized water is also commonly used for water treatment in cooling systems, boilers, and other equipment. Using pure deionized water can effectively prevent scale and corrosion, extend the service life of equipment, and improve work efficiency.

Other common applications are:
1.) Treat seawater, salt water, etc. to produce high-quality water supply and drinking water.
2.) Public facilities and real estate industry: supply high-quality water network systems and swimming pool circulating water treatment systems.
3.) Chemical Industry: Process pure water required for manufacturing processes.
4.) Textile printing and dyeing industry: process pure water used to remove hardness and salt.

NEWater Filter Bags are Used in a Variety of Industrial Applications.

4. Deionized Water VS Distilled Water: Know the Difference?

Deionized water uses ion exchange resin to remove a large number of anions and cations in the water, but it cannot remove all ions. Distilled water is condensed when steam encounters cold, so it basically contains no ions (except hydrogen ions and hydroxyl ions).
The purity of distilled water is relatively higher than that of deionized water, so the conductivity of distilled water is lower. Distilled water is generally used for analysis, while deionized water is used for factory production.

Distilled Water vs Deionized Water

The water has undergone a process called “distillation” where the common impurities are eradicated. “Demineralization” is the term used to describe the process of producing water that is free of ions.
Deionized water’s purity is lower than that of regular water. The water produced is ultra-pure.
The distilled water has been boiled to a certain expected temperature and then condensed. Mainly use ion exchange resins to remove ionic substances from water.
Water is considered safe to drink but the mineral contents have been removed. It’s impossible to eliminate water’s uncharged particles and molecules with this method.

5. Advantages of Deionized Water and Distilled Water.

– Deionized Water

Deionized water is water that has been stripped of its mineral ions, resulting in pure H2O. The deionization process removes positively and negatively charged ions from water using ion exchange resins, making it suitable for a number of applications. In the medical industry, DI water is used to achieve successful and accurate results

Common advantages of DI Water are:

      • High purity

Due to DI water’s purity level, it is the most preferred by many industries because of common water impurities elimination avoiding sediment build-up and corrosion to equipment, food, and beverage contamination, etc.

      • Avoid corrosion

Minerals in water cause corrosion on metal-based machines and equipment. DI water has been purified, leaving no trace of impurities in the water.

      • No evident sediment

DI water aids in the removal of minerals that may cause visible residue on equipment and metal surfaces, thereby extending the life of the equipment and metal surfaces.

      • Easy to generate

Deionization is a more convenient and faster method of producing distilled water than other water treatment methods.

-Distilled Water

Distilled water removes impurities such as heavy metals, minerals, and organic and inorganic compounds through the successful boiling and evaporation method. Most places that do not have access to treated water, typically those near the sea, use a distillation process to generate potable drinking water from the sea.

Common advantages of Distilled Water are:

      • Pure water available to cleanse our body

Water is an essential part of our bodies because it has numerous benefits for cleansing our systems. Drinking distilled water is beneficial because it contains no harmful chemicals.

      • Prevents the possible diseases

Waterborne pathogens are removed during the distillation process, making them safe to drink and use.

      • Removes harmful chemicals from the water

Distilled water is expected to eliminate all harmful chemicals, which is why it has been proven safe for consumption in residential and commercial settings.

6. Conclusion

From this article, we can say both are effective at removing contaminants from your water supply. Deionized water goes through a less thorough purification process than distillation, so distilled water has fewer dissolved minerals while deionized water is created by running pressurized tap or well water through an ion exchange resin, which removes all the ions (positively and negatively charged particles).

Based on your needs, we recommend the most suitable equipment for you and provide professional distilled water purifiers, deionization systems, and electro-deionization system customization services. Obtaining both deionized and distilled water for your business will become easier with the help of our qualified engineering team.

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