A novel treatment of wastewater containing toxic substances by rapid separation of low concentrated ultra fine particles

H. Sasaki, G. C. Badulis, Chiharu Tokoro, K. Nakamoto

    研究成果: Conference contribution

    抄録

    Treatment of wastewater from mining operations and refineries by precipitation which generates large volume of hydroxide sludge can coprecipitate toxic substances such as Cd, As, Pb, Se, etc. Results in our laboratory works showed that Ferro-Nickel Slag fibers (FS) in column bed served as excellent media in the rapid separation (2 mm/s linear velocity) of suspended low concentrated ultra fine sludge particles (SS) from precipitation. This can be explained by the DLVO theory based on the heterocoagulation phenomena between the FS fibers in column bed and the ultra fine particles. In the separation of low concentrated toxic substances such as Cd, Se and Pb in the wastewater, the above mechanisms were also applied but with FS fiber surface modifications. This was carried-out to low concentrated Cd solution (1 mg/l), which was rapidly separated by precipitation of Cd to ultra fine CdS particles by the addition of sulfide ions in the presence of 100 - 102 mg/l Fe or Zn. Rapid separation of 1 mg/l Cd2+ was also carried-out by application of ferrous sulfide surface modification to FS fibers. Other precipitation method was also applied to Pb solution (1 mg/l) using bioreactor with Sulfate Reducing Bacteria (SRB) on FS bed. In the rapid separation of SeO4 2-, the basic ferrous and ferric hydroxide surface modification on the surface of FS fibers was conducted. Favorable rapid separation results were obtained and as a conclusion, low concentrated toxic substances can be selectively removed suggesting that potential drastic change in wastewater treatment processes in the future.

    元の言語English
    ホスト出版物のタイトルProceedings - European Metallurgical Conference, EMC 2005
    ページ1779-1794
    ページ数16
    4
    出版物ステータスPublished - 2005
    イベントEuropean Metallurgical Conference, EMC 2005 - Dresden
    継続期間: 2005 9 182005 9 21

    Other

    OtherEuropean Metallurgical Conference, EMC 2005
    Dresden
    期間05/9/1805/9/21

    Fingerprint

    Poisons
    Wastewater
    Fibers
    Surface treatment
    Sulfides
    Bioreactors
    Nickel
    Wastewater treatment
    Slags
    Sulfates
    Bacteria
    Ions

    ASJC Scopus subject areas

    • Metals and Alloys

    これを引用

    Sasaki, H., Badulis, G. C., Tokoro, C., & Nakamoto, K. (2005). A novel treatment of wastewater containing toxic substances by rapid separation of low concentrated ultra fine particles. : Proceedings - European Metallurgical Conference, EMC 2005 (巻 4, pp. 1779-1794)

    A novel treatment of wastewater containing toxic substances by rapid separation of low concentrated ultra fine particles. / Sasaki, H.; Badulis, G. C.; Tokoro, Chiharu; Nakamoto, K.

    Proceedings - European Metallurgical Conference, EMC 2005. 巻 4 2005. p. 1779-1794.

    研究成果: Conference contribution

    Sasaki, H, Badulis, GC, Tokoro, C & Nakamoto, K 2005, A novel treatment of wastewater containing toxic substances by rapid separation of low concentrated ultra fine particles. : Proceedings - European Metallurgical Conference, EMC 2005. 巻. 4, pp. 1779-1794, European Metallurgical Conference, EMC 2005, Dresden, 05/9/18.
    Sasaki H, Badulis GC, Tokoro C, Nakamoto K. A novel treatment of wastewater containing toxic substances by rapid separation of low concentrated ultra fine particles. : Proceedings - European Metallurgical Conference, EMC 2005. 巻 4. 2005. p. 1779-1794
    Sasaki, H. ; Badulis, G. C. ; Tokoro, Chiharu ; Nakamoto, K. / A novel treatment of wastewater containing toxic substances by rapid separation of low concentrated ultra fine particles. Proceedings - European Metallurgical Conference, EMC 2005. 巻 4 2005. pp. 1779-1794
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