| 垂直流人工湿地中污染物昼夜及沿程变化规律 |
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| 引用本文： | 高敏,朱伟,董婵,赵联芳.垂直流人工湿地中污染物昼夜及沿程变化规律[J].水资源保护,2010,26(2):49-52. |
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| 作者姓名： | 高敏 朱伟 董婵 赵联芳 |
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| 作者单位： | 1. 河海大学环境学院,江苏,南京,210098
2. 河海大学环境学院,江苏,南京,210098;水资源高效利用与工程安全国家工程研究中心,江苏,南京,210098 |
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| 基金项目： | 国家自然科学基金，水利部公益项目 |
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| 摘 要： | 利用垂直潜流人工湿地单元模型探讨COD、TN和NH4+-N质量浓度在一昼夜之中随时间及深度的变化规律。结果表明:垂直潜流人工湿地中污染物去除率的变化呈一定的周期性,昼夜差距较大。COD、NH4+-N和TN的去除率在15:00达到最大,夜间最小。COD和NH4+-N质量浓度在表层(距湿地底部60～90cm段)迅速降低,底部变化幅度较小。TN浓度沿程的降低趋势很明显。湿地中COD、NH4+-N和TN质量浓度的变化趋势与DO显著相关,DO质量浓度越高,越有利于有机物和氮的去除。
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| 关 键 词： | 垂直流人工湿地 日变化 沿程变化 有机物 氮 DO |
| 修稿时间： | 2010/4/6 0:00:00 |
Diurnal and spatial variations of pollutants in vertical flow constructed wetland |
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| GAO Min,ZHU Wei,DONG Chan,ZHAO Lian-fang.Diurnal and spatial variations of pollutants in vertical flow constructed wetland[J].Water Resources Protection,2010,26(2):49-52. |
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| Authors: | GAO Min ZHU Wei DONG Chan ZHAO Lian-fang |
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| Affiliation: | GAO Min1,ZHU Wei1,2,DONG Chan1,ZHAO Lian-fang1(1.College of Environment,Hohai University,Nanjing 210098,China,2.National Engineering Research Center of Water Resources Efficient Utilization , Engineering Safety,China) |
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| Abstract: | The patterns of variations of COD, TN and NH4＋ -N concentrations with time and space during one day and night were studied in a laboratory-scale vertical flow constructed wetland. The results showed that the removal rate of pollutants had a certain periodicity, and that there was a large difference between day and night. The highest removal rate of COD, NH4＋ -N and TN appeared at 15：00, and the lowest appeared at night. COD and NH3＋-N decreased rapidly in the upper part of the wetland （60 - 90 em above the bottom）, and varied slightly in the middle and lower part. TN decreased significantly along the course of the wetland. The changing trend of COD, TN and NH4＋ -N concentrations was significantly correlated with DO： the higher the DO concentration was in the wetland, the more beneficial DO was to the removal rates of organics and nitrogen. |
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| Keywords: | DO |
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