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Evaluation of in situ water electrochemical disinfection using novel carbon-based and noble metal electrodes

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Abstract

In this study, the morphology, chemical composition, and electrochemical characteristics of three carbon-based and three noble metal/alloy electrodes were evaluated. Measurement of free chlorine production was carried out using iodine–starch method. Measurement of hypochlorite production was performed using N,N-diethyl-p-phenylenediamine (DPD). The electro-catalytic activity of the electrodes was characterized using cyclic voltammetry (CV). Among the noble metals, the gold–palladium alloy electrode showed the best catalytic performance. Among the carbon-based electrodes, TiC showed the best catalytic performance. Scanning electron microscopy (SEM) images before and after reaction confirms the stability of the TiC electrode, proving its potential for long-term use. The chemical structure of the electrodes was characterized using X-ray photoelectron spectroscopy (XPS) and this showed that carbon electrodes present a trace graphene oxide structure (sp3 orbitals C–OH/C–O). Moreover, the modification of porous carbon by vacuum-assisted TiO2 impregnation indicates that the electronic state of TiC did not change due to impregnation with TiO2. In summary, the TiC carbon-based electrode shows high stability and potential for long use.

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Acknowledgements

We acknowledge the Global Station for Food, Land and Water Resources (GSF), a project of Global Institution for Collaborative Research and Education at Hokkaido University for support and partial funding of this research.

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Authors and Affiliations

  1. Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, 060-8628, Japan

    Mokhtar Guizani & Ryusei Ito

  2. Global Institution for Collaborative Research and Education, Hokkaido University, Kita 9, Nishi 10, Kita-ku, Sapporo, 060-8589, Japan

    Mokhtar Guizani & Toshikazu Kawaguchi

  3. Graduate School of Environmental Science, Hokkaido University, N10W5, Sapporo, 060-0810, Japan

    Kento Yajima

  4. Faculty of Environmental Science, Hokkaido University, Kita 10, Nishi 5, Kita-ku, Sapporo, 060-0810, Japan

    Toshikazu Kawaguchi

  5. Graduate School of Global Food Resources, Kita 9, Nishi 10, Kita-ku, Sapporo, 060-8589, Japan

    Mokhtar Guizani, Toshikazu Kawaguchi & Naoyuki Funamizu

  6. Research Institute of Humanity and Nature, 457-4 Motoyama, Kamigamo, Kita-ku, Kyoto, 603-8047, Japan

    Naoyuki Funamizu

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  1. Mokhtar Guizani
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  2. Kento Yajima
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  3. Toshikazu Kawaguchi
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  4. Ryusei Ito
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  5. Naoyuki Funamizu
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Correspondence to Mokhtar Guizani.

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On behalf of all authors, the corresponding author states that there are no conflicts of interest to declare.

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This paper has been selected from the 1st Euro-Mediterranean Conference for Environmental Integration, Tunisia 2017.

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Guizani, M., Yajima, K., Kawaguchi, T. et al. Evaluation of in situ water electrochemical disinfection using novel carbon-based and noble metal electrodes. Euro-Mediterr J Environ Integr 3, 31 (2018). https://doi.org/10.1007/s41207-018-0075-8

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  • DOI: https://doi.org/10.1007/s41207-018-0075-8

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