期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 581, 期 -, 页码 396-402出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.07.108
关键词
Water treatment; Selective fluoride removal; Reduced graphene oxide/hydroxyapatite; composite; Capacitive deionization
资金
- Ministry of Trade, Industry & Energy (MOTIE, Korea) [10082572]
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2020R1C1C1014664]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10082572] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2020R1C1C1014664] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study achieved selective fluoride removal in a CDI system using rGO/HA composite material, which showed a significantly higher fluoride removal capacity compared to the traditional AC electrode. Experimental results demonstrate an increase in fluoride removal capacity with the application of adequate voltage. Furthermore, the rGO/HA electrode exhibits stability and reusability in operation.
Capacitive deionization (CDI) is an emerging desalination technology with an environmental-friendly operation and energy-efficient properties. However, activated carbon (AC) used for CDI electrode does not have a significant preference toward anions, leading to unnecessary energy consumption for treating fluoridated water. Hence, we achieved selective fluoride removal in CDI system using a reduced graphene oxide/hydroxyapatite composite (rGO/HA), a novel fluoride selective electrode material. The results showed that the rGO/HA electrode has 4.9 times higher fluoride removal capacity than the AC electrode from a ternary solution consisting of fluoride, chloride, and nitrate ions. The fluoride removal capacity increased when the adequate voltage was applied. Furthermore, the rGO/HA electrode exhibited stability and reusability without significant capacity loss even after 50-cycle operation, maintaining about 0.21 mmol g(-1) of fluoride removal capacity and approximately 96% of regeneration efficiency. Thus, this study suggests a novel electrode material for effective and selective fluoride removal in the CDI system. (C) 2020 Published by Elsevier Inc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据