| Treatment of Wastewater Containing Heavy Metals Using Dissolved Air Released Flotation Column |
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| 引用本文： | LI Xiao-bing LIU Jiong-tian WANG Yong-tian CAO Yi-jun. Treatment of Wastewater Containing Heavy Metals Using Dissolved Air Released Flotation Column[J]. 中国矿业大学学报(英文版), 2005, 15(3): 187-191 |
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| 作者姓名： | LI Xiao-bing LIU Jiong-tian WANG Yong-tian CAO Yi-jun |
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| 作者单位： | School of Chemical Engineering and Technology, China Universit3＂ of Mining ＆ Technology, Xuzhou, Jiangsu 221008, China |
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| 基金项目： | Projects 50425414 supported by National Fund for Distinguished Young Scholars and B200403 by Science and Technology Fund of China University of Mining ＆Technology |
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| 摘 要： | A new type of dissolved air released flotation column is developed to treat wastewater containing Cr（Ⅵ） based on advantages of both dissolved air floatation and column floatation. By using a column with a diameter of 50 mm and a specially made dissolved air releaser, micro-bubbles inside the column can be formed. N2H4H2O was used as reductant, AlCl3 as flocculant, C12H25SO3Na（SDS） as surfactant in the experiment. The effects of pH of wastewater, pressure of dissolved air, ratio of return water, and concentration of flocculant and surfactant on the removal efficiency are studied. The results show that the efficiency of dissolved air released flotation column is much higher than that of other approaches after the operation parameters are optimized, with the reduction ratio of Cr（Ⅵ ） in wastewater reaching 98%. So this technique can be widely used in wastewater treatment
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| 关 键 词： | 选矿方法 浮选 废水处理 重金属 铬 |
| 收稿时间： | 2005-03-31 |
| 修稿时间： | 2005-04-22 |
Treatment of Wastewater Containing Heavy Metals Using Dissolved Air Released Flotation Column |
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| LI Xiao-bing,LIU Jiong-tian,WANG Yong-tian,CAO Yi-jun. Treatment of Wastewater Containing Heavy Metals Using Dissolved Air Released Flotation Column[J]. Journal of China University of Mining and Technology, 2005, 15(3): 187-191 |
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| Authors: | LI Xiao-bing LIU Jiong-tian WANG Yong-tian CAO Yi-jun |
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| Abstract: | A new type of dissolved air released flotation column is developed to treat wastewater containing Cr(Ⅵ) based on advantages of both dissolved air floatation and column floatation. By using a column with a diameter of 50 mm and a specially made dissolved air releaser, micro-bubbles inside the column can be formed. N2H4.H2O was used as reductant, AlCl3 as flocculant, C12H25SO3Na(SDS) as surfactant in the experiment. The effects of pH of wastewater, pressure of dissolved air, ratio of return water, and concentration of flocculant and surfactant on the removal efficiency are studied. The results show that the efficiency of dissolved air released flotation column is much higher than that of other approaches after the operation parameters are optimized, with the reduction ratio of Cr(Ⅵ) in wastewater reaching 98%. So this technique can be widely used in wastewater treatment. |
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| Keywords: | dissolved air released flotation column wastewater treatment heavy metal |
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