摘要
利用垂直潜流人工湿地单元模型探讨COD、TN和NH4+-N质量浓度在一昼夜之中随时间及深度的变化规律。结果表明:垂直潜流人工湿地中污染物去除率的变化呈一定的周期性,昼夜差距较大。COD、NH4+-N和TN的去除率在15:00达到最大,夜间最小。COD和NH4+-N质量浓度在表层(距湿地底部60～90cm段)迅速降低,底部变化幅度较小。TN浓度沿程的降低趋势很明显。湿地中COD、NH4+-N和TN质量浓度的变化趋势与DO显著相关,DO质量浓度越高,越有利于有机物和氮的去除。
The patterns of variations of COD, TN and NH4＋ -N concentrations with time and space during one day and night were studied in a laboratory-scale vertical flow constructed wetland. The results showed that the removal rate of pollutants had a certain periodicity, and that there was a large difference between day and night. The highest removal rate of COD, NH4＋ -N and TN appeared at 15：00, and the lowest appeared at night. COD and NH3＋-N decreased rapidly in the upper part of the wetland （60 - 90 em above the bottom）, and varied slightly in the middle and lower part. TN decreased significantly along the course of the wetland. The changing trend of COD, TN and NH4＋ -N concentrations was significantly correlated with DO： the higher the DO concentration was in the wetland, the more beneficial DO was to the removal rates of organics and nitrogen.
出处
《水资源保护》
CAS
2010年第2期49-52,共4页
Water Resources Protection
基金
国家自然科学基金(50979028)
水利部公益项目(200801065)
关键词
垂直流人工湿地
日变化
沿程变化
有机物
氮
DO
vertical flow constructed wetland
diurnal variation
space variation
organics
nitrogen
dissolved oxygen
作者简介
高敏（1984-），女，河北涿鹿人，硕士研究生，研究方向为水环境与水生态。E—mail：well．grn@163．com
