表面流湿地去除洱海缓冲带低污染水氮模拟研究

张俊朋; 陆轶峰; 国晓春; 卢少勇; 吴鑫

doi:10.3969/j.issn.1674-991X.2018.05.064

表面流湿地去除洱海缓冲带低污染水氮模拟研究

doi: 10.3969/j.issn.1674-991X.2018.05.064

张俊朋^1,2,,
陆轶峰¹,
国晓春²,
卢少勇^2*,,
吴鑫^1,2

^1. 云南大学生态学与环境学院,云南昆明 650091
^2. 中国环境科学研究院,湖泊水污染治理与生态修复技术国家工程实验室,北京 100012

详细信息

作者简介:
张俊朋(1990—),男,硕士研究生,研究方向为水污染控制

中图分类号: X524
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- 被引次数: 0
出版历程
- 收稿日期: 2018-05-28
- 刊出日期: 2018-09-20

Nitrogen removal of simulated low-polluted water of Lake Erhai buffer zone by surface-flow wetland

ZHANG Junpeng^{1,2
,},
LU Yifeng¹,
GUO Xiaochun²,
LU Shaoyong^{2*
,},
WU Xin^1,2

^1. School of Ecology and Environment Science, Yunnan University, Kunming 650091, China
^2. National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China

摘要

摘要: 针对洱海缓冲带内典型低污染水的污染问题,选取洱海西区白鹤溪与梅溪间以农田为主要用地的典型缓冲带,监测了缓冲带内的地表径流水质,在洱海现场设置了不同植物表面流湿地中试系统,于2016年9月—2017年8月研究其对洱海缓冲带模拟低污染水氮的去除效果。结果表明:植物湿地系统具有较好的氮去除效果,总氮(TN)年均去除率表现为荇菜湿地(83.1%)>芦苇湿地(73.9%)>黑藻湿地(73.3%)>空白湿地(65.5%),荇菜湿地对TN去除效果最好,去除率最稳定;各湿地系统氨氮(N $H 4 +$ -N)年均去除率高于77%;各植物湿地系统沿程氮去除率分析结果表明,出水水质达到Ⅲ类时,荇菜湿地、黑藻湿地和芦苇湿地氮去除最佳宽度分别为7.04、8.64和6.92 m;试验期间湿地系统中荇菜、黑藻和芦苇氮去除贡献率分别为5.88%、3.23%和21.12%,芦苇对氮去除贡献率明显高于荇菜和黑藻,芦苇、黑藻对氮去除贡献率表现出较大的季节性差异,而荇菜不同季节对氮去除贡献率差异较小。
- 表面流湿地 /
- 洱海缓冲带 /
- 低污染水 /
- 氮去除 /
- 最佳宽度
Abstract: Aiming at the pollution problem of typical low-polluted water (produced by agricultural non-point sources) in Lake Erhai buffer zone, the typical buffer zone mostly occupied by farmland between Baihe Stream and Mei Stream in the western Lake Erhai basin were selected to monitor the surface runoff quality of the buffer zone, and to set up the surface flow pilot wetland for field study. The nitrogen removal effect for simulated low-polluted water of Lake Erhai buffer zone from September 2016 to August 2017 was studied. The results indicate that the pilot system has a high nitrogen removal effect, with annual average removal rate of total nitrogen as Nymphoides peltatum wetland (83.1%) >reed wetland (73.9%) >Hydrilla verticillata wetland (73.3%) >blank wetland (65.5%). The average annual removal rate of ammonia nitrogen was higher than 77%. Among different plant systems, Nymphoides peltatum system has the best removal effect of total nitrogen and the most stable removal rate. The removal rate and width of each system were simulated, and it reveals that the optimum width of the Nymphoides peltatum, Hydrilla verticillata and Phragmites communis wetland systems was respectively 7.04 m, 8.64 m and 6.92 m while the effluent water quality is of class Ⅲ water. The contribution rate of nitrogen removal in Nymphoides peltatum, Hydrilla verticillata and Phragmites communis wetland systems during the test is 5.88%, 3.23% and 21.12%, respectively. The total nitrogen content of reeds in wetlands is significantly higher than that of Nymphoides peltatum and Hydrilla verticillata. The contribution rate of Phragmites communis and Hydrilla verticillata to nitrogen removal in wetland shows a large seasonal difference, while the contribution rate of Nymphoides peltatum in wetland to nitrogen removal in different seasons varies little.
- surface-flow wetland /
- buffer zone of Lake Erhai /
- low-polluted water /
- nitrogen removal /
- best width

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