地理科学 ›› 2012, Vol. 32 ›› Issue (1): 87-93.doi: 10.13249/j.cnki.sgs.2012.01.87

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扎龙湿地水质净化机理分析

李红艳1,2(), 章光新1(), 李绪谦3, 高蕊3, 邓春暖4   

  1. 1.中国科学院湿地生态与环境重点实验室 中国科学院东北地理与农业生态研究所, 吉林 长春 130012
    2.吉林省地质环境监测总站, 吉林 长春 130021
    3.吉林大学环境与资源学院, 吉林 长春 130026
    4. 云南师范大学旅游与地理科学学院, 云南 昆明 650092
  • 收稿日期:2011-03-04 修回日期:2011-06-03 出版日期:2012-01-20 发布日期:2012-01-20
  • 作者简介:

    作者简介:李红艳(1982-),女,辽宁省辽阳人,博士研究生,主要从事水文水资源及水环境保护的研究。E-mail:563-li@163.com

  • 基金资助:
    中国科学院知识创新项目(KZCX2-YW-Q06-2, KZCX2-YW-126)资助

Water Purification Mechanism of Zhalong Wetland

Hong-yan LI1,2(), Guang-xin ZHANG1(), Xu-qian LI3, rui GAO3, Chun-nuan DENG4   

  1. 1.Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun,Jilin 130012, China
    2. Jilin Geological Environment Monitoring Station, Changchun, Jilin 130021, China,China
    3.College of Environment and Resource of Jilin University,Changchun, Jilin 130026,China
    4. Yunnan Normal University, School of Tourism and Geographic Science, Kunming, Yunnan 650092,China
  • Received:2011-03-04 Revised:2011-06-03 Online:2012-01-20 Published:2012-01-20

摘要:

降解污染和净化水质是湿地的重要功能。利用现场调查和水质监测资料,分析扎龙湿地水化学场特征,研究水质现状、净化机理及其与湿地水化学形成条件之间的关系。结果表明,扎龙湿地对TP、NH4-N、CODcr和悬浮物的净化率达到90%以上,对TN和NO3-N 净化率可达到75%以上。水质净化功能对生态环境的自然修复作用明显,主要的水质净化机理为吸附沉淀作用、植物吸收作用、生物降解作用、反硝化作用,净化能力大小与溶液化学条件的整体特征、湿地的地质背景、水文化学循环和生物作用过程有关。

关键词: 扎龙湿地, 水质净化, 净化机理, 水化学场

Abstract:

Environmental pollution degradation and water purification are the major function of wetland. This article analyzes the water field characteristics and researches the water quality by field investigation and water quality monitoring. based on the theory of chemical thermodynamics and systematic analytic method,analyzes the relationship between water purification mechanism of Zhalong Wetland and the formation of water chemistry. The result indicates that the major mechanism of water purification of Zhalong Wetland is adsorption precipitation, plant uptake, biodegradation and denitrification, and the purification ability is highly related to chemical condition of solution, geological characteristics of wetland, chemical cycle and biological effect. And the NH4+ entered in the wetland was removed by the adsorption of clay, which reduced the concentration of TN and NO3- in the center of wetland. The concentration of Ca2+, NH4+ in the peripheral of wetland decreased with the direction of runoff, while the concentration of Na+ increased with the runoff direction. Carbonate balance play an important role in the formation and characteristics of pollutant migration. Stable pH value controlled the existence formation of pollutants and the direction and strength of its migration, and controlled the existence formation, migration and transformation of inorganic phosphorus. The existence formation of phosphorus in the low content of neutral and alkaline water was HPO42- and H2PO4-. The content of organic nitrogen is higher in sewage. The main transformation mechanism is biochemical effect and the reaction product is NH4+. Due to NH4+ is susceptible to be adsorption or absorbed by soil and biology, so it is lower in the water. Zhalong Wetland purified TP, NH4-N, CODcr and suspended matter with the rates higher than 90% and purified TN, NO3-N with the rates higher than 75%. The water purification function restores the natural ecosystem remarkably. The regulation of condition of water environment can extremely improved the ability of the wetland’s water purification, and the power of water environment control.

Key words: ZhalongWetland, water purification, purification mechanism, water chemical field

中图分类号: 

  • X131.2