| 污水灌溉土壤及地下水三氮的变化动态分析 |
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| 引用本文： | 姜翠玲,夏自强.污水灌溉土壤及地下水三氮的变化动态分析[J].水科学进展,1997,8(2):183-188. |
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| 作者姓名： | 姜翠玲 夏自强 |
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| 作者单位： | 1.河海大学水资源水文系 南京 210098; |
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| 摘 要： | 取徐州奎河的生活污水进行饱和灌溉实验,由埋设在田间的一对蒸渗仪(地下水位保持在1m)观测,结果表明:污水中含量高达5035mg/L的氨氮进入土壤后,大部分被土壤胶体所吸附,迁移能力差,一般不会直接污染地下水。但污水在下渗时,能淋溶土壤中积存的NO2-和NO3-离子,使它们在地下水中的含量迅速增加。污灌以后,随土壤含水量、氧化还原电位和Ph值的变化,氨化作用、硝化作用和反硝化作用依次成为氮素转化的主要机制。污灌10d之内,由于淋溶和硝化作用产生的NO2-、NO3-会造成浅层地下水的严重污染。
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| 关 键 词： | 污水灌溉 三氮 土壤 地下水 |
| 收稿时间： | 1995-11-07 |
Variation Trends of Three Types of Nitrogen in the Soil and Groundwater after Wastewater Irrigation |
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| Jiang Cuiling,Xia Ziqiang,Liu Ling,Zhao Shengling,Wang Lei,Wang Zhengcheng,Zheng Wenlan.Variation Trends of Three Types of Nitrogen in the Soil and Groundwater after Wastewater Irrigation[J].Advances in Water Science,1997,8(2):183-188. |
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| Authors: | Jiang Cuiling Xia Ziqiang Liu Ling Zhao Shengling Wang Lei Wang Zhengcheng Zheng Wenlan |
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| Affiliation: | 1.Hohai University, Nanjing 210098;2.Xuzhou Hydrology and Water Resources Survey Section, Xuzhou 221006 |
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| Abstract: | The saturated irrigation tests were carried out in a couple of lysimeters (the levels of groundwater are all 1m) built in the field of Huaibei Plain.The irrigating water was taken from Kuiriver of Xuzhou.The results obtained are summarized as follows:Although ammonium-N is as high as 5.35mg/L in the wastewater,it con't pollute the groundwater directly when wastewater irrigates it in the soil in a normal condition,because ammonium-N is sorbed mainly by soil colloids and is difficult to move.When wastewater moves down,it leaches washing nitrite and nitrate that have accumulated in the soil,and makes their concentrations increase rapidly.After irrigating,with the variation of moisture,oxygen and pH value,the ammonification,nitrification and denitrification are successively the majorcauses of nitrogen trasformation in the soil.During ten days of irrigation,NO2- and NO3- arisen from leaching and nitrification bring about serious pollution in the shallow groundwater. |
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| Keywords: | wastewater irrigation three types of nitrogen soil groundwater |
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