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Pretreatment for capacitive deionization: Feasibility tests using activated filter media and granule activated carbon filtration

Authors
Kim, HeegonChoi, YeseulLee, SoonjaeLee, Ki-BongJung, Kyung-WonChoi, Jae-Woo
Issue Date
25-1월-2021
Publisher
ELSEVIER SCIENCE INC
Keywords
Activated filter media; Capacitive deionization; Liquid chromatography with organic carbon detection; Municipal wastewater
Citation
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v.93, pp.253 - 258
Indexed
SCIE
SCOPUS
KCI
Journal Title
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume
93
Start Page
253
End Page
258
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/50069
DOI
10.1016/j.jiec.2020.10.001
ISSN
1226-086X
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. (C) 2020 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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공과대학 (화공생명공학과)
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