Deionisation is the process of removing dissolved mineral ions from water, producing a non-mineral, highly purified water state. This process is often used in water treatment, laboratory applications, and industrial settings where mineral-free water is required. Deionisation works by passing water through ion exchange resins, which replace positively charged cations and negatively charged anions with hydrogen and hydroxide ions, respectively. These ions combine to form pure water (H₂O), free from impurities like calcium, magnesium, chloride, and sulfate. Deionised water is commonly used in pharmaceutical manufacturing, electronics production, and boiler feed water systems, where even trace minerals can cause scaling, corrosion, or contamination. Regular maintenance of deionisation systems, including resin regeneration and filter replacement, is necessary to ensure consistent water purity and system efficiency.
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