Demineralised Water: A Comprehensive Guide
Understanding Demineralised Water
The Science Behind Its Creation
1. Processes Involved
- Deionization: This method uses special ion-exchange resins to remove mineral ions from water.
- Distillation: By boiling water and capturing the resulting steam, impurities and minerals are left behind.
- Electrodialysis: This uses electrical processes to move salts through membranes, purifying the water.
- Membrane Filtration: Techniques such as nanofiltration or reverse osmosis employ semi-permeable membranes to remove impurities from water.
2. The Procedure
Demineralised vs Distilled Water
Demineralised Water Plants: An Overview
These are essentially large-scale, industrial setups geared towards producing demineralised water. These plants are equipped with two pressure vessels filled with cationic and anionic exchange resins. The type of resin chosen depends on various factors like water temperature, required water quality, and existing impurities.
Applications of Demineralised Water
- Feeding high-pressure boilers.
- Cleaning in chip manufacturing.
- Usage in medical facilities or labs demanding high purity water.
- In pharmaceuticals as processed water.
- In microelectronics.
On the pH Scale
DIY Distilled Water
While true demineralised water requires specialized machinery, you can produce distilled water at home, which is a close substitute. The method involves boiling water in one bottle, capturing the steam in another bottle, and then allowing it to recondense. This homemade method provides an affordable way to obtain pure water, though it’s not as precise as the industrial methods.