| 底泥中氮的主要迁移转化过程及其转化模型的研究 |
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| 引用本文： | 戴树桂,张明顺,庄源益.底泥中氮的主要迁移转化过程及其转化模型的研究[J].环境科学学报,1990,10(1):1-9. |
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| 作者姓名： | 戴树桂 张明顺 庄源益 |
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| 作者单位： | 南开大学环境科学系，南开大学环境科学系，南开大学环境科学系 天津，天津 中国环境管理干部学院，天津 |
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| 摘 要： | 研究了NO_3~--N,NH_4~+-N在底泥中的扩散、吸附以及NO_3~--N的反硝化等过程.结果表明,在泥-水界面间,NH_4~+-N主要向上浮水中扩散,NO_3~--N主要向间隙水中扩散.扩散到间隙水中的NO_3~--N45％被吸附,30％因反硝化作用而失掉,其反硝化速率常数在7—11cm层最大.氮的吸附速率常数在表层最大.建立了间隙水中NO_3~--N和NH_4~+-N的转化模型,并计算了氮在泥-水界面间的扩散量,计算结果与实测结果基本相符.
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| 关 键 词： | 底泥 氮 循环 模型 富营养化 |
| 收稿时间： | 1/9/1989 12:00:00 AM |
TRANSPORTATION AND TRANSLOCATION OF NITROGEN IN SEDIMENT |
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| Dai Shugui,Zhang Mingshun and Zhuang Yuanyi.TRANSPORTATION AND TRANSLOCATION OF NITROGEN IN SEDIMENT[J].Acta Scientiae Circumstantiae,1990,10(1):1-9. |
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| Authors: | Dai Shugui Zhang Mingshun and Zhuang Yuanyi |
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| Institution: | Department of Environmental Science,Nankai University,Tianjin,Department of Environmental Science,Nankai University,Tianjin and Department of Environmental Science,Nankai University,Tianjin |
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| Abstract: | The diffusion and the adsorption of NO8-N and NH4-N and the denr-trification of NO8-N in sediment were studied. NH4-N diffused cross the interface of water-sediment into the water column while NO8-N transferred in another direction.In interstitial water,45 percent of NO8-N from overlying water was adsorbed and 30 percent was lost during denitrifica-tion. The denitrification rate constant of NO8-N reached its maximum between 7-11 cm of the sediment and the maximum adsorption occurred in the top few centimeters of the sediment. Transport models of NO8-N and NH4-N in interstitial water were suggested and applied to calculate the amounts of nitrogen transferred cross the interface. |
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| Keywords: | nitrogen sediment mass transfer |
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