污染控制技术及原理
薛岩,裴元生,呼丽娟,刘军.介质筛护岸的水质净化功能与机理[J].环境科学学报,2008,28(6):1118-1122
介质筛护岸的水质净化功能与机理
- Function and mechanism of the media sieve embankment on water purification
- 基金项目：国家高技术研究发展计划(863)项目(No.2003AA601060)
- 作者
- 单位
- 薛岩
- 兰州交通大学环境与市政工程学院, 兰州 730070
- 裴元生
- 北京师范大学环境学院, 北京 100875
- 呼丽娟
- 北京师范大学环境学院, 北京 100875
- 刘军
- 兰州交通大学环境与市政工程学院, 兰州 730070
- 摘要：以桂林桃花江介质筛护岸工程为依托,对介质筛护岸的水质净化功能进行了试验研究.结果表明,介质筛护岸两侧水位波动促进了生物地球化学反应的发生.介质筛护岸对COD、NH4+-N和TN的平均去除率分别为76.5%、95%和81%.介质层内的COD浓度逐层降低,在距离岸边2.5m左右的沸石强化层中,其浓度接近5mg·L-1;在介质筛的第5、6层内NH4+-N的浓度基本稳定在0.3mg·L-1.沸石层对NH4+-N吸附的有效厚度为10cm,能够满足水质净化的目的.
- Abstract：Water purification experiments were conducted in a media-sieve embankment(MSE)with zeolite barrier,in the Taohuajiang river,in the city of Guilin.Fluctuation of the water table on both sides of the MSE promoted water purification by way of a biogeochemical process.Average removal rates of COD,NH4+-N and TN in the MSE were 76.5%,95% and 81%,respectively.The concentration of CODgradually decreased from outside to inside in the MSE.In the tested zeolite barrier,about 2.5 m away from the bank the concentration of CODwas close to 5 mg·L-1.Concentrations of NH4+-N in the fifth and sixth layers were stabilized at 0.3 mg·L-1.An effective thickness(10cm)of the zeolite barrier could adsorb NH4+-N completely and meet the requirement of river-water purification.
- Key words：media-sieve bank water purification COD nitrogen zeolite
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