摘要
本文主要分析了贾鲁河半人工梯级河滩湿地在露滩前后湿地水质指标变化,以及露滩后沉积物在干化过程中的形状变化。研究结果表明,露滩后湿地水体中总氮和氨氮的去除效率显著增强,其中,氨氮去除效率提高了3倍;随露滩时间的延长,湿地沉积物矿化自净能力增强,即湿地沉积物落干加速了有机物和总氮的矿化过程,且表层沉积物矿化效率较高;随着湿地沉积物干化,湿地硝化过程加速,引发硝态氮在湿地沉积物中产生“表聚”现象,这主要是因为湿地沉积物通过吸附水体中硝态氮增强了净化效果。
In this paper,the change of water quality index of Jialu River Wetland before and after open fl oodplain and the change of sediment shape during drying process were analyzed.The results showed that the removal effi ciency of total nitrogen and ammonia nitrogen in wetland water was signifi cantly enhanced after exposed shoaling,and the removal effi ciency of ammonia nitrogen was up to 3 times higher;with the prolongation of exposed beach time,the self-purifi cation ability of wetland sediment mineralization increases,that is,the drying of wetland sediment accelerates the mineralization process of organic matter and total nitrogen,and the mineralization effi ciency of surface sediments is higher;With the drying of wetland sediments,the nitrifi cation process accelerates,leading to the“surface aggregation”phenomenon of nitrate nitrogen in wetland sediments,this is mainly because wetland sediments enhance the purifi cation effect by absorbing nitrate nitrogen from water.
作者
骆巧玲
Luo Qiaoling(Nanjing Zerun Ecological Environment Co.,Ltd.,Nanjing 210000,China)
出处
《皮革制作与环保科技》
2022年第8期89-91,共3页
Leather Manufacture and Environmental Technology
关键词
河流湿地
土壤
干湿交替
氮
river wetland
soil
dry and wet alternating
nitrogen
