Enhanced electrosorption capacity of activated carbon electrodes for deionized water production through capacitive deionization

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dc.creatorSufiani, Omari
dc.creatorHideki, Tanaka
dc.date2020-09-07T09:35:36Z
dc.date2020-09-07T09:35:36Z
dc.date2020
dc.date.accessioned2022-10-20T13:09:18Z
dc.date.available2022-10-20T13:09:18Z
dc.descriptionAbstract. The full-text article is available at https://doi.org/10.1016/j.seppur.2020.116998
dc.descriptionThe deionized water (DI) of high purity standards is used in several industrial processes to manufacture products and technologies for high-end applications. Currently, DI water is produced by either reverse osmosis or continuous electrodeionization systems, however; both of them are facing several limitations. Therefore there is an urgent need for alternative technologies for DI water production. This study investigated the suitability of producing DI water by using capacitive deionization (CDI) with nitric acid-treated activated carbon electrodes (NTAC). Activated carbon (AC) was etched in nitric acid solution to introduce various oxygen functional groups on its surface. The Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy were used to confirm the increased surface oxygen-containing groups on AC after nitric acid treatment that enhanced its salt adsorption capacity. CDI experiments were conducted using a water solution of 12.0 μS/cm as a result DI water with the conductivity of 1.6 μS/cm (DI water grade III, according to International Organization of Standards) was produced. Also, electrochemical tests revealed good capacitive behaviour due to improved conductivity with NTAC having the highest specific capacitance of 381.7 F/g compared to 106.6 F/g of AC electrode. This study provides an insight into the electrosorption performance of materials in desalination of solutions of low ionic strength.
dc.identifierSufiani, O., Tanaka, H., Teshima, K., Machunda, R. L., & Jande, Y. A. (2020). Enhanced electrosorption capacity of activated carbon electrodes for deionized water production through capacitive deionization. Separation and Purification Technology, 116998.
dc.identifierhttp://hdl.handle.net/20.500.12661/2475
dc.identifier.urihttp://hdl.handle.net/20.500.12661/2475
dc.languageen
dc.publisherElsevier
dc.subjectCapacitive deionization
dc.subjectCDI
dc.subjectDeionized water
dc.subjectActivated carbon
dc.subjectOxygen functional groups
dc.subjectEnhanced electrosorption
dc.subjectDI
dc.subjectDI water production
dc.subjectAC
dc.titleEnhanced electrosorption capacity of activated carbon electrodes for deionized water production through capacitive deionization
dc.typeArticle

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