As(V) wastewater treatment using Fe(III) - Supported resins

Masao Morita, Fumiya Futami, Chiharu Tokoro

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Contaminated water by arsenic is one of the serious problems in the world. Especially in South Asian area, there is a danger of exposure to arsenic by drinking contaminated groundwater. Ion exchange resins packed into columns have been widely used in wastewater treatment. Furthermore, Fe(III) salts have been widely known as an economical reagent for As(V) removal. Therefore, the aim of this study was to investigate As(V) removal mechanism using Fe(III)-supported resins. First, As(V) removal experiment with the batch method was conducted. The chemical states of Fe(III) and As(V) in ion exchange resins were evaluated by Electron probe micro analyzer (EPMA) and X-ray absorption fine structure (XAFS) spectroscopy. These results suggested that Fe(III) diffusion inside the resin was the rate-determining step, requiring prolonged reaction time for As(V) removal. These solid analysis results also suggested that As(V) was removed by the combination of surface precipitation of ferric arsenate and surface complexation to ferrihydrite. Furthermore, Column test for As(V) removal experiments were conducted using the column packed with Fe(III)-supported resins. It was confirmed that the column packed with Fe(III)-supported resins achieved both As(V) uptake and solid-liquid separation at once.

    Original languageEnglish
    Title of host publicationEARTH 2015 - Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology
    PublisherInternational Symposium on East Asian Resources Recycling Technology
    Pages107-116
    Number of pages10
    Publication statusPublished - 2015
    Event13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015 - Pattaya, Thailand
    Duration: 2015 Nov 12015 Nov 4

    Other

    Other13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015
    CountryThailand
    CityPattaya
    Period15/11/115/11/4

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    Keywords

    • As(V) removal
    • Column
    • Wastewater treatment

    ASJC Scopus subject areas

    • Environmental Science(all)

    Cite this

    Morita, M., Futami, F., & Tokoro, C. (2015). As(V) wastewater treatment using Fe(III) - Supported resins. In EARTH 2015 - Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology (pp. 107-116). International Symposium on East Asian Resources Recycling Technology.