Biochemical rust removal by Thiobacillus ferrooxidans

Kuniki Kino, Nobuyuki Sugimoto, Kazuhiko Kuroda, Shoji Usami

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    Biochemical removal of rust from iron surfaces has been investigated. By immersing a rusted iron plate in the culture medium of an iron-oxidizing bacterium, Thiobacillus ferrooxidans, iron adjacent to the rust was dissolved and the rust was peeled off. Since the amount of dissolved iron per unit iron plate surface area correlated with the concentration of ferric iron in the culture medium, the formation of ferric iron is probably involved in dissolving the iron as is the case for bacterial leaching. In the present study, rust removal in a "continuous" system in which the culture medium was circulated from the fermentor to the rust removal vessel and back again to the fermentor, has also been investigated. Although growth inhibition was observed with the formation of ferric iron precipitates during the operation in this system, it was possible to prevent this precipitation by lowering the pH of the medium during the mixed cultivation of T. ferrooxidans and a sulfur-oxidizing bacterium, T. thiooxidans.

    Original languageEnglish
    Pages (from-to)128-132
    Number of pages5
    JournalEuropean Journal of Applied Microbiology and Biotechnology
    Volume13
    Issue number2
    DOIs
    Publication statusPublished - 1981 Jun

    Fingerprint

    Thiobacillus
    Iron
    Culture Media
    Bioreactors
    Bacteria
    Sulfur

    ASJC Scopus subject areas

    • Microbiology
    • Biotechnology

    Cite this

    Biochemical rust removal by Thiobacillus ferrooxidans. / Kino, Kuniki; Sugimoto, Nobuyuki; Kuroda, Kazuhiko; Usami, Shoji.

    In: European Journal of Applied Microbiology and Biotechnology, Vol. 13, No. 2, 06.1981, p. 128-132.

    Research output: Contribution to journalArticle

    Kino, Kuniki ; Sugimoto, Nobuyuki ; Kuroda, Kazuhiko ; Usami, Shoji. / Biochemical rust removal by Thiobacillus ferrooxidans. In: European Journal of Applied Microbiology and Biotechnology. 1981 ; Vol. 13, No. 2. pp. 128-132.
    @article{e12f08370ee043be9541f4be7174277c,
    title = "Biochemical rust removal by Thiobacillus ferrooxidans",
    abstract = "Biochemical removal of rust from iron surfaces has been investigated. By immersing a rusted iron plate in the culture medium of an iron-oxidizing bacterium, Thiobacillus ferrooxidans, iron adjacent to the rust was dissolved and the rust was peeled off. Since the amount of dissolved iron per unit iron plate surface area correlated with the concentration of ferric iron in the culture medium, the formation of ferric iron is probably involved in dissolving the iron as is the case for bacterial leaching. In the present study, rust removal in a {"}continuous{"} system in which the culture medium was circulated from the fermentor to the rust removal vessel and back again to the fermentor, has also been investigated. Although growth inhibition was observed with the formation of ferric iron precipitates during the operation in this system, it was possible to prevent this precipitation by lowering the pH of the medium during the mixed cultivation of T. ferrooxidans and a sulfur-oxidizing bacterium, T. thiooxidans.",
    author = "Kuniki Kino and Nobuyuki Sugimoto and Kazuhiko Kuroda and Shoji Usami",
    year = "1981",
    month = "6",
    doi = "10.1007/BF00499700",
    language = "English",
    volume = "13",
    pages = "128--132",
    journal = "European Journal of Applied Microbiology and Biotechnology",
    issn = "0171-1741",
    publisher = "Springer Verlag",
    number = "2",

    }

    TY - JOUR

    T1 - Biochemical rust removal by Thiobacillus ferrooxidans

    AU - Kino, Kuniki

    AU - Sugimoto, Nobuyuki

    AU - Kuroda, Kazuhiko

    AU - Usami, Shoji

    PY - 1981/6

    Y1 - 1981/6

    N2 - Biochemical removal of rust from iron surfaces has been investigated. By immersing a rusted iron plate in the culture medium of an iron-oxidizing bacterium, Thiobacillus ferrooxidans, iron adjacent to the rust was dissolved and the rust was peeled off. Since the amount of dissolved iron per unit iron plate surface area correlated with the concentration of ferric iron in the culture medium, the formation of ferric iron is probably involved in dissolving the iron as is the case for bacterial leaching. In the present study, rust removal in a "continuous" system in which the culture medium was circulated from the fermentor to the rust removal vessel and back again to the fermentor, has also been investigated. Although growth inhibition was observed with the formation of ferric iron precipitates during the operation in this system, it was possible to prevent this precipitation by lowering the pH of the medium during the mixed cultivation of T. ferrooxidans and a sulfur-oxidizing bacterium, T. thiooxidans.

    AB - Biochemical removal of rust from iron surfaces has been investigated. By immersing a rusted iron plate in the culture medium of an iron-oxidizing bacterium, Thiobacillus ferrooxidans, iron adjacent to the rust was dissolved and the rust was peeled off. Since the amount of dissolved iron per unit iron plate surface area correlated with the concentration of ferric iron in the culture medium, the formation of ferric iron is probably involved in dissolving the iron as is the case for bacterial leaching. In the present study, rust removal in a "continuous" system in which the culture medium was circulated from the fermentor to the rust removal vessel and back again to the fermentor, has also been investigated. Although growth inhibition was observed with the formation of ferric iron precipitates during the operation in this system, it was possible to prevent this precipitation by lowering the pH of the medium during the mixed cultivation of T. ferrooxidans and a sulfur-oxidizing bacterium, T. thiooxidans.

    UR - http://www.scopus.com/inward/record.url?scp=51649159486&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=51649159486&partnerID=8YFLogxK

    U2 - 10.1007/BF00499700

    DO - 10.1007/BF00499700

    M3 - Article

    VL - 13

    SP - 128

    EP - 132

    JO - European Journal of Applied Microbiology and Biotechnology

    JF - European Journal of Applied Microbiology and Biotechnology

    SN - 0171-1741

    IS - 2

    ER -