潜流人工湿地对微污染河水的净化效果  

Purification efficiencies of subsurface horizontal flow constructed wetland treating slightly polluted river water

作　　者：谢飞 黄磊[2] 高旭[2] 马晓霞 刘明[2] 郭劲松[2] 

机构地区：[1]重庆市河道管理站,重庆401147 [2]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [3]重庆中设工程设计股份有限公司,重庆400023

出　　处：《环境工程学报》2013年第1期65-71,共7页Chinese Journal of Environmental Engineering

基　　金：国家"十二五"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)

摘　　要：为了探讨潜流人工湿地对微污染河水的净化效果,在野外条件下构建潜流人工湿地,分析了湿地中pH、氧化还原电位(ORP)和DO的进出水变化,考察了湿地中污染物的净化效果,探讨了温度对湿地净化效果的影响。各湿地进、出水DO浓度相差不大;除美人蕉湿地外,其余湿地出水pH较进水变化较小;植物湿地出水ORP较进水均有所增大。植物湿地对污染物的去除效果均优于空白湿地,且随着气温的升高,NH4+-N、TN和CODMn的去除率逐渐增加,去除率分别可达90%、50%和20%。TP去除率却未随温度发生明显变化,始终波动在30%～60%之间。相关性分析结果表明湿地中NH4+-N和TN的去除率与温度相关,较低的有机物浓度造成CODMn的去除率与温度相关性差,由于湿地对磷的去除主要以颗粒态磷(PP)为主,TP的去除与温度不相关。Five identical subsurface horizontal flow constructed wetlands （SHFCWs） with different plants were constructed to treat slightly polluted fiver water under field conditions. The changes of pH, DO and ORP between influent and effluent were monitored, and also the impact of temperature on purification efficiencies was studied. Results showed that there were almost no differences between influent and effluent to DO in all five SHFCWs. Except wetland planted with Canna inclica, there was a similar situation to pH in the rest of four wet- lands. Compared with ORP of influent, ORP of effluent increased in planted wetlands. Removal rates of pollu- tants in planted wetland were higher than that of blank wetland, and the removal efficiencies of NHf -N, TN and CODMn increased with temperature increasing, which could reach to 90% , 50% and 20% , respectively. But re- moval efficiency of TP had no obvious change, varied from 30% to 60% in planted wetlands. The results of cor- relation analyses showed that there were significant correlations between temperature and removal of NH4 -N and TN. The correlation between temperature and removal of CODMn was poor for low CODMn in influent. Because particulate phosphorus （PP） was the main form in all sorts of phosphorus removal, there was almost no correlation between removal of TP and temperature.

关 键 词：水平潜流人工湿地 微污染河水 温度 去除率 

分 类 号：X703.1[环境科学与工程—环境工程]