摘要
本研究以绿狐尾藻(Myriophyllum elatinoides)湿地系统为对象,分析绿狐尾藻湿地系统中NH_4^+-N的去除规律及氮质量平衡。结果表明,试验第28天,在200和400mg·L^(-1) NH_4^+-N两个处理中,水体全氮(TN)去除率分别为86.1%和77.7%,NH_4^+-N去除率分别为89.8%和78.8%。根据氮质量平衡得出,在200和400mg·L^(-1) NH_4^+-N两个处理中分别有14.7%和30.2%的外源NH_4^+-N直接被底泥吸附,25.3%和11.0%转化成底泥NO_3^--N,29.7%和12.7%被绿狐尾藻直接吸收利用,14.0%和23.3%残留在水体,剩余16.3%和22.8%可能被微生物硝化反硝化作用去除。研究结果表明,绿狐尾藻对氨氮有较好的净化效果,为其在人工湿地的应用提供了科学依据。
In the present study,the ammonium nitrogen removal characteristics and nitrogen mass balance in indoor Myriophyllum elatinoides wetland system were analysis.The results showed after 28 days treatment with200 and 400mg·L^-1 NH4^＋-N,the removal rates of total nitrogen（TN）and NH4^＋-N in artificial wastewater were 77.7% and 86.1%,89.8% and 78.8%,respectively.According to the nitrogen mass balance,14.7%and 30.2% of the exogenous NH4^＋-N were transformed into sediment NH4^＋-N and 25.3%and 11% of exogenous NH4^＋-N were transformed into sediment NO3^-N by 200 mg·L^-1 NH4^＋-N and 400 mg·L^-1 NH4^＋-N treatments;29.7% and 12.7% of exogenous NH4^＋-N was absorbed by M.elatinoides;14.0% and 23.3% of exogenous NH4^＋-N became residual nitrogen in the water and 16.3% and 22.8% of exogenous NH4^＋-N eventually to nitrification and denitrification removal.The results suggested that M.elatinoides can effectively purify ammonium nitrogen which provides scientific basis for its application in artificial wetland.
出处
《草业科学》
CAS
CSCD
北大核心
2016年第11期2189-2195,共7页
Pratacultural Science
基金
"十二五"国家科技支撑计划项目(2014BAD14B05)
湖南省战略性新兴产业成果转化项目(2015GK1014)
湖南省科技支撑计划(2015NK3003)
关键词
绿狐尾藻
氨氮
氮去除
植物吸收
硝化和反硝化作用
氮质量平衡
Myriophyllum elatinoides
artificial wetland
nitrogen removal
nitrification and denitrification
nitrogen mass balance
