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黄菖蒲和狭叶香蒲根系对氮磷的吸收动力学

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陈国元, 李国新, 唐凯. 黄菖蒲和狭叶香蒲根系对氮磷的吸收动力学[J]. 环境工程学报, 2013, 7(12): 4638-4642.
引用本文: 陈国元, 李国新, 唐凯. 黄菖蒲和狭叶香蒲根系对氮磷的吸收动力学[J]. 环境工程学报, 2013, 7(12): 4638-4642.
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Chen Guoyuan, Li Guoxin, Tang Kai. Kinetics of nitrogen and phosphorus uptake by root system of Iris pseudacorus L. and Typha angustifolia L.[J]. Chinese Journal of Environmental Engineering, 2013, 7(12): 4638-4642.
Citation: Chen Guoyuan, Li Guoxin, Tang Kai. Kinetics of nitrogen and phosphorus uptake by root system of Iris pseudacorus L. and Typha angustifolia L.[J]. Chinese Journal of Environmental Engineering, 2013, 7(12): 4638-4642.
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黄菖蒲和狭叶香蒲根系对氮磷的吸收动力学

  • 1.

    厦门理工学院环境科学与工程学院, 厦门 361024

  • 基金项目:

    国家自然科学基金资助项目（51309197）

    福建省自然科学基金资助项目（2012J05080）

    福建省教育厅A类项目（JA12257）

    厦门市科技计划项目资助（3502Z20110016）

  • 中图分类号: X171

Kinetics of nitrogen and phosphorus uptake by root system of Iris pseudacorus L. and Typha angustifolia L.

  • 1.

    College of Environment Science and Engineering, Xiamen University of Technology, Xiamen 361024, China

  • Fund Project:

  • 摘要: 采用改进的常规耗竭法，研究了黄菖蒲（Iris pseudacorus L.）和狭叶香蒲（Typha angustifolia L.）根系对NH4+、NO3-和H2PO4-的吸收特征及差异。结果表明，这2种植物根系对NH4+、NO3-和H2PO4-的吸收动力学特征均可采用Michaelis-Menten方程描述。2种植物根系对NH4+、NO3-和H2PO4-的亲和力（Km）和最大吸收速率（Vmax）有显著差异。吸收H2PO4-时，黄菖蒲根系具有较高的Vmax值和较低的Km值，说明黄菖蒲具有嗜磷特性，并能够适应广范围浓度的H2PO4-环境，适宜用于污染水体磷的去除；吸收NO3-时，狭叶香蒲根系具有较高的Vmax值和较低的Km值，表明狭叶香蒲可用于广范围浓度NO3-污染的水体修复；吸收NH4+时，黄菖蒲根系具有较低的Vmax值和Km值，而狭叶香蒲根系具有较高的Vmax值和Km值，说明黄菖蒲适宜用于NH4+污染较轻水体的修复，而在NH4+污染较重水体中宜选用狭叶香蒲作为先锋植物。
    Abstract: The NH4+, NO3- and H2PO4- uptake kinetics of root system of Iris pseudacorus L. and Typha angustifolia L. were investigated by using the modified depletion method. Results showed that the NH4+, NO3- and H2PO4- uptake kinetics of the two plants' root system could be expressed with the Michaelis-Menten equation. The Michaelis-Menten constant (Km) and the maximum uptake rate (Vmax) was significantly different between the two plants' root systems. The root system of Iris pseudacorus L. had higher Vmax and lower Km for H2PO4- than that of Typha angustifolia L.' root system, which suggested that Iris pseudacorus L. had the capability to adapt to a various concentrations of H2PO4- environment and made it a better candidate for removing phosphorus in polluted water. In addition, Typha angustifolia L.' root system had higher Vmax and lower Km for NO3- than that of Iris pseudacorus L.' root system, which indicated that Typha angustifolia L. was suitable for treatment of all levels of NO3- polluted water. The values of Vmax and Km for NH4+ of Iris pseudacorus L.' root system were lower than that of Typha angustifolia L.' root system, which showed that Iris pseudacorus L. was applicable to repair the less contaminated water by NH4+ and Typha angustifolia L. should be selected for NH4+ seriously polluted water bodies.
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  • 收稿日期:  2012-11-15
  • 刊出日期:  2013-12-08

黄菖蒲和狭叶香蒲根系对氮磷的吸收动力学

  • 1. 厦门理工学院环境科学与工程学院, 厦门 361024
  • 收稿日期:  2012-11-15
基金项目:

国家自然科学基金资助项目（51309197）

福建省自然科学基金资助项目（2012J05080）

福建省教育厅A类项目（JA12257）

厦门市科技计划项目资助（3502Z20110016）

摘要: 采用改进的常规耗竭法，研究了黄菖蒲（Iris pseudacorus L.）和狭叶香蒲（Typha angustifolia L.）根系对NH4+、NO3-和H2PO4-的吸收特征及差异。结果表明，这2种植物根系对NH4+、NO3-和H2PO4-的吸收动力学特征均可采用Michaelis-Menten方程描述。2种植物根系对NH4+、NO3-和H2PO4-的亲和力（Km）和最大吸收速率（Vmax）有显著差异。吸收H2PO4-时，黄菖蒲根系具有较高的Vmax值和较低的Km值，说明黄菖蒲具有嗜磷特性，并能够适应广范围浓度的H2PO4-环境，适宜用于污染水体磷的去除；吸收NO3-时，狭叶香蒲根系具有较高的Vmax值和较低的Km值，表明狭叶香蒲可用于广范围浓度NO3-污染的水体修复；吸收NH4+时，黄菖蒲根系具有较低的Vmax值和Km值，而狭叶香蒲根系具有较高的Vmax值和Km值，说明黄菖蒲适宜用于NH4+污染较轻水体的修复，而在NH4+污染较重水体中宜选用狭叶香蒲作为先锋植物。

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