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| 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
環境資源管理系 |
| 關鍵字: | Arsenic
Arsenate
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 |
| 顯示於類別: | [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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