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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/1144


    標題: REMOVAL OF NITRATE ION CONTAMINATED GROUND WATER BY ELEMENTAL IRON POWDER COUPLED WITH THE BUBBLING OF CARBON DIOXIDE
    以元素鐵配合二氧化碳曝氣處理地下水中硝酸根離子
    作者: 廖志祥
    貢獻者: 環境工程與科學系
    日期: 2003
    上傳時間: 2008-06-26 15:52:41 (UTC+8)
    出版者: 台南縣:嘉南藥理科技大學環境工程與科學系
    摘要: This paper presents an innovative technology for the removal of nitrate from groundwater by combination of Fe0 and CO2 bubbling. The bubbling of CO2 created effectively an acidic environment favorable to Fe0 corrosion, which results in nitrate reduction. In 10 min, the solution pH dropped to 3.2 with CO2 inflow rate of 500 mL/min. In the presence of Fe0 (2 g/L), the CO2 bubbling (500 mL/min) induced conversion of nitrate-N (~7 mg/L) by 85% in 40 min. In addition, the end product in the reaction mixture was ammonium, which accounts for 90-104% of nitrate conversion with the presence of various iron dosages (0.5-2.0 g/L). Though the formation of ammonium is a drawback, the ammonium was eliminated from aqueous phase by a follow-up treatment of settling (30 min) and air-aeration (50 min). What was achieved in this study demonstrates that the Fe0/CO2 method can be applied with success for the total removal of nitrate-contaminated waters.
    Appears in Collections:[環境工程與科學系(所)] 校內計畫

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