Abstract
Dissolved organic matter and scaling are the main causes of electrode fouling, blocking activated carbon pores and reducing their performance. However, limited information exists on fouling by low molecular weight organic matter in the capacitive deionization (CDI) process. This study therefore systematically investigated for the first time a pretreatment process to prevent the accumulation of organic and inorganic matter as well as scaling in the CDI process. During various pretreatments, activated filter media and granule activated carbon were considered promising for drinking water treatment. The higher the turbidity and organic matter concentration in the CDI feed solution was, the greater the reduction of salt removal efficiency, production rate, and energy consumption became. Divalent ions, such as Ca2+, had no noticeable effect on CDI treatment performance because of the neutralization effect of the dispersant, whereas iron had a noticeable effect on CDI electrode fouling. The results of this study are foreseen to help minimize its negative impact by reducing organic matter fouling and enabling water reuse.
Original language | English |
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Pages (from-to) | 253-258 |
Number of pages | 6 |
Journal | Journal of Industrial and Engineering Chemistry |
Volume | 93 |
DOIs | |
Publication status | Published - 2021 Jan 25 |
Bibliographical note
Publisher Copyright:© 2020 The Korean Society of Industrial and Engineering Chemistry
Keywords
- Activated filter media
- Capacitive deionization
- Liquid chromatography with organic carbon detection
- Municipal wastewater
ASJC Scopus subject areas
- General Chemical Engineering