摘要
为了探讨潜流湿地对三峡库区微污染河水的净化效果,在野外构建芦竹、菖蒲、空心菜和无植物(空白)水平潜流人工湿地,研究人工湿地系统中微生物基本菌群和功能菌群数量分布,探讨污染物去除与微生物菌群种类和数量的相关性.结果表明:实验湿地系统运行情况良好,植物湿地系统对各污染物指标的去除效果优于空白湿地系统;芦竹、菖蒲、空心菜和空白湿地系统的微生物数量均随温度的降低而减少,其中,植物湿地系统的微生物数量高于空白系统;各湿地系统的微生物数量与水质指标去除率之间的相关性较强,在夏季,不同人工湿地系统的细菌总数与CODMn的去除率之间存在着显著的正相关,真菌、亚硝酸细菌总数与铵氮去除率之间均存在着显著的正相关,在冬季,不同人工湿地系统的反硝化细菌总数与总氮去除率之间存在着显著的正相关.
In order to investigate the impact of microorganism in constructed wetland on purification efficiencies for slightly polluted river water in Three Gorges Reservoir Region, four horizontal subsurface flow wetlands planted with Arando do max, Acorus cala- mus, Ipomoea aquatica and without plants （blank） were built in situ next to the Lushan River. The distribution of microbial basic flora and function flora in the wetlands were monitored, purification efficiencies of the constructed wetland systems were studied, and the correlation between microorganism and removal rates of pollutants were analyzed. The results showed that the experimental wetlands were adaptive to variation of inflow quality and quantity, and the removal efficiency of pollutants could be improved by planting hydrophytes. Microbial population in the planted wetlands was more than that in the blank wetland. There was positive correlation between microorganism quantity and temperature in all four wetlands, and quantity of ammonifying bacteria, nitrifying bacteria and denitrifying bacteria decreased significantly with the decline of temperature. There was conspicuous positive correlation between fungus population and removal of ammonia in summer, as well as bacteria population and removal of CODM,. It is similar positive correlation between denitrifying bacteria population and removal of total nitrogen in winter.
出处
《湖泊科学》
CAS
CSCD
北大核心
2012年第5期687-692,共6页
Journal of Lake Sciences
基金
国家科技支撑计划项目(2012BAJ25B09)
重庆市环境保护局环保科技计划项目(2011第12号)联合资助
关键词
水平潜流人工湿地
微污染水
微生物
净化效果
三峡库区
Subsurface horizontal flow wetland
slightly polluted river water
microorganism
purification efficiencies
Three Gorges Reservoir Region
