南京林业大学学报(自然科学版) ›› 2024, Vol. 48 ›› Issue (5): 221-227.doi: 10.12302/j.issn.1000-2006.202304011

• 研究论文 • 上一篇    下一篇

3种水生植物对尾水的净化效果及生理特征变化

夏桐桐(), 吴永波*(), 蒲可逸, 王明丽   

  1. 南京林业大学生态与环境学院,南方现代林业协同创新中心,江苏 南京 210037
  • 收稿日期:2023-04-11 修回日期:2023-11-24 出版日期:2024-09-30 发布日期:2024-10-03
  • 通讯作者: * 吴永波(yongbowu0920@163.com),副教授。
  • 作者简介:

    夏桐桐(1972888423@qq.com)。

  • 基金资助:
    江苏省林业科技创新项目(LYKJ[2022]02);江苏省自然资源发展专项资金项目(JSZRHYKJ202112)

The tailwater purification effectiveness of three aquatic plants and their subsequent physiological changes aquatic

XIA Tongtong(), WU Yongbo*(), PU Keyi, WANG Mingli   

  1. Co-Innovation Center for Sustainable Forestry in Southern China, College of Ecology and Environment, Nanjing Forestry University, Nanjing 210037, China
  • Received:2023-04-11 Revised:2023-11-24 Online:2024-09-30 Published:2024-10-03

摘要:

【目的】探究水生植物对污水处理厂尾水的净化效果及生理特征变化,为尾水深度净化及植物选择提供参考依据。【方法】以水葱(Schoenoplectus tabernaemontani)、香蒲(Typha orientalis)、黄菖蒲(Iris pseudacorus)为研究对象,在室外试验模拟配制2种不同浓度的污水厂尾水,分析这3种植物对不同浓度尾水中化学需氧量(COD)、总氮(TN)、总磷(TP)的去除效果以及植物的生理特征变化。【结果】3种植物对尾水中COD、TN和TP均有良好的去除效果,尾水中COD质量浓度由61.42~107.28 mg/L下降至8.63~16.20 mg/L,TN由24.49~31.54 mg/L下降至0.40~7.90 mg/L,TP由2.11~3.43 mg/L下降至0.05~1.00 mg/L。水葱和黄菖蒲在尾水中抗氧化酶活性和相对电导率增大,香蒲过氧化物酶(POD)活性和相对电导率显著下降(P<0.05),过氧化氢酶(CAT)活性显著上升(P<0.05)。3种植物在尾水中的叶绿素含量均显著下降(P<0.05),水葱在高浓度COD、TN和TP尾水中光合作用减弱。【结论】水葱、香蒲和黄菖蒲对污水厂尾水中COD、TN和TP去除效果显著,植物在尾水中生理代谢受到影响。综合各参数,可将水葱和香蒲搭配种植用于低浓度COD、TN和TP尾水的净化,黄菖蒲用于高浓度尾水的净化。

关键词: 水生植物, 尾水净化, 生理特征, 水葱, 香蒲, 黄菖蒲

Abstract:

【Objective】 This study aims to explore the effectiveness of hydrophytes in purifying tailwater from a sewage plant and the subsequent changes in their physiological characteristics. The results will provide a reference for the effective purification of tailwater and the selection of suitable hydrophytes for this task. 【Method】 Taking Schoenoplectus tabernaemontani, Typha orientalis and Iris pseudocorus as research objects, pot-control experiments were conducted to simulate the preparation of two different tailwaters, each characterized by different concentrations of contaminants. The removal effects on chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP), and the subsequent physiological characteristics of the three hydrophytes in the two different tailwaters were analyzed. 【Result】 The three types of hydrophytes all had strong removal effects for COD, TN and TP in tailwater. The COD concentration in tailwater decreased from 61.42-107.28 to 8.63-16.20 mg/L, the TN concentration decreased from 24.49-31.54 to 0.40-7.90 mg/L, and the TP concentration decreased from 2.11-3.43 to 0.05-1.00 mg/L. The antioxidant enzyme activity and relative conductivity of S. tabernaemontani and I. pseudocorus increased in the tailwater, while the peroxidase activity and relative conductivity of T. orientalis decreased significantly (P <0.05), and the catalase activity increased significantly (P <0.05). The chlorophyll content of all three hydrophytes in the tailwater decreased significantly (P <0.05), while the photosynthesis of S. tabernaemontani decreased in the tailwater with the higher concentration of contaminants. 【Conclusion】 Schoenoplectus tabernaemontani, T. orientalis and I. pseudocorus had significant removal effects on COD, TN and TP in the tailwater. The physiological metabolism of hydrophytes was affected following the exposure to the tailwater. It was concluded that S. tabernaemontani and T. orientalis can be planted together for purifying tailwater with low concentrations of contaminants, while I. pseudocorus can be used for the purification of severely contaminated tailwater.

Key words: aquatic plant, tailwater purification, physiological characteristics, Schoenoplectus tabernaemontani, Typha orientalis, Iris pseudacorus

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