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    Adsorption-capacitive deionization hybrid system with activated carbon of modified potential of zero charge

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    Abstract (63.18Kb)
    Date
    2023-02-15
    Author
    Sufiani, Omari
    Elisadiki, Joyce
    Tanaka, Hideki
    Teshima, Katsuya
    Sahini, Mtabazi
    Machunda, Revocatus
    Jande, Yusufu
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    Abstract
    In this study water solutions are desalinated with carbon electrodes of modified surface charges. The idea is to endow the electrodes with the ability to physically adsorb salt ions without applying potential so as to save energy. The modification enhanced to decrease the energy consumption of a newly invented adsorption-CDI hybrid system by 19%, since modified activated carbon cell consumed 0.620 (relative error 3.00%) kWh/m3 compared to pristine activated carbon cell which consumed 0.746 (relative error 1.20%) kWh/m3. Further analysis revealed high adsorption capacity of the modified activated carbon electrode cell which exhibited 9.0 (relative error 2.22%) compared to activated carbon cell with 5.3 (relative error 5.66%) mg g−1. These results show the potential of surface modification in adding value to low cost activated carbons for application in CDI.
    URI
    https://doi.org/10.1016/j.envres.2022.115114
    https://dspace.nm-aist.ac.tz/handle/20.500.12479/1813
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