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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/27016

    標題: Gas-bubbled nano zero-valent iron process for high concentration arsenate removal
    作者: Tanboonchuy, Visanu
    Hsu, Jia-Chin
    Grisdanurak, Nurak
    Liao, Chih-Hsiang
    貢獻者: 職業安全衛生系
    關鍵字: Arsenic
    Nano-scale iron
    Gas bubbling
    日期: 2011-02
    上傳時間: 2013-10-23 11:55:40 (UTC+8)
    出版者: Elsevier
    摘要: In this study, batch experiments were performed to investigate a novel process for high concentration arsenate removal in the presence of air and/or CO2 bubbling. The pretreatment step, CO2 bubbling at 300 mL/min for 5 min, was taken to adjust the solution pH to an acidic environment, followed by air bubbling at 300 mL/min for 10 min to increase dissolved oxygen in the solution. In the treatment period, the nano-scale zero-valent iron was applied to remove aqueous arsenate of 3000 μg/L, while the treatment system was continuously bubbled by 300 mL/min of air. Such a process resulted in outstanding performance in arsenate removal. Furthermore, in the field groundwater application, the arsenate removal rate for the proposed process was 5 times faster than the rate measured when the system was pretreated by acidic chemical species only.
    關聯: Journal of Hazardous Materials , 186(2-3), pp.2123-2128
    Appears in Collections:[職業安全衛生系(含防災所)] 期刊論文
    [環境資源管理系(所)] 期刊論文

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