What is capacitive deionization used for?

What is capacitive deionization used for?

• A. To generate electrical energy from chemical reactions
• B. To enhance battery performance
• C. To remove ions from water through electric fields
• D. To improve corrosion resistance in metals

Answer: (C)

Capacitive deionization is primarily utilized for the removal of ions from water through the application of electric fields. In this method, electrodes are used to create an electric field that attracts and retains ions present in water. When an electrical voltage is applied across the electrodes, ions in the solution migrate towards the oppositely charged electrodes, where they are adsorbed and effectively removed from the water. This process is particularly advantageous for water desalination and purification, as it enables the selective extraction of various ions, making it an efficient and environmentally friendly technique. The other options do not accurately reflect the application's purpose of capacitive deionization. Generating electrical energy from chemical reactions pertains more to fuel cells or batteries, enhancing battery performance generally relates to different technologies such as additives or designs, and improving corrosion resistance in metals involves treatments or coatings rather than deionization processes.

Capacitive deionization is primarily utilized for the removal of ions from water through the application of electric fields. In this method, electrodes are used to create an electric field that attracts and retains ions present in water. When an electrical voltage is applied across the electrodes, ions in the solution migrate towards the oppositely charged electrodes, where they are adsorbed and effectively removed from the water. This process is particularly advantageous for water desalination and purification, as it enables the selective extraction of various ions, making it an efficient and environmentally friendly technique.

The other options do not accurately reflect the application's purpose of capacitive deionization. Generating electrical energy from chemical reactions pertains more to fuel cells or batteries, enhancing battery performance generally relates to different technologies such as additives or designs, and improving corrosion resistance in metals involves treatments or coatings rather than deionization processes.