Electrochemical softening using capacitive deionization (CDI) with zeolite modified carbon electrode (ZMCE)
Year: 2016
Type: article
Abstract: Divalent ions such as calcium and magnesium ions are thought to cause hardness in water inducing scale problems in the pipelines of boilers and heat exchangers. Thus, water softening has gained wide interest in water treatment technology. Although zeolite particles have been widely used as a material for the removal of divalent ions, its low ion-exchange efficiency based on diffusion-dependent process has limited their applications in water softening. Herein, we report effective electrochemical softening using zeolite with capacitive deionization (CDI), which is a desalination technology with electrochemical ad/desorption in an electric double layer. The carbon electrode with zeolite (denoted as a zeolite modified carbon electrode (ZMCE)) was prepared by the slurry and pasting method with zeolite particles and carbon black. ZMCE exhibited a significantly enhanced efficiency in the removal of divalent ions in softening using the CDI process compared to the normal softening process based on diffusion. This enhanced ion removal efficiency was attributed to the migration force as a result of the electrical energy during CDI operations.
Source: Desalination and Water Treatment
Institution: Seoul National University
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $1,000
OpenAlex ID: W2346284200