Which process does the deionizer facilitate in water treatment systems?

The deionizer plays a critical role in water treatment systems by utilizing the process of ion exchange to purify water. In this process, the deionizer removes dissolved ions such as calcium, magnesium, sodium, and chloride from the water. The deionization process involves resin beads that are charged either positively or negatively. As water flows through these resin beads, undesirable ions in the water are exchanged for hydrogen and hydroxide ions, which recombine to form purified water.

This ion exchange is essential for producing high-purity water that is required in various applications, including laboratory experiments, pharmaceutical manufacturing, and electronic industries. The effectiveness of this process in removing ionic contaminants makes it the preferred choice for applications demanding pure water.

In contrast, other options like condensation, filtration, and chlorination do not involve the ion removal process that is fundamental to how a deionizer operates. Condensation relates to phase change, filtration targets solid particles rather than ions, and chlorination is aimed at disinfecting water rather than purifying it through ion removal. Thus, ion exchange remains the defining feature of the deionizer's role in water treatment systems.