多级串联人工湿地对城市地面径流的沿程净化规律  

Purification of Urban Surface Runoff Along Multi-level Series Constructed Wetlands

作　　者：李亚娇[1] 汪琴琴 高志新[3] 陈虹[3] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054 [2]郑州自来水投资控股有限公司,河南郑州450007 [3]西安理工大学西北旱区生态水利工程国家重点实验室培育基地,陕西西安710048

出　　处：《中国给水排水》2014年第17期105-108,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51209168;51279158);陕西省教育厅重点实验室项目(11JS078);中国博士后科学基金面上项目(20100481353)

摘　　要：研究不同水深(350、550、750 mm)条件下,水平潜流和复合流两组人工湿地对城市地面径流的沿程净化效果。结果表明:在不同水深条件下,污染物浓度沿程降低,复合流人工湿地的净化效果要好于水平潜流人工湿地。当水深为350 mm时,对TN和NH3-N的降解作用主要发生在湿地的前12 m;当水深为550和750 mm时,此降解作用则主要发生在湿地的前6 m。对TP、正磷(DP)和COD的降解作用主要发生在湿地的前6 m,两组湿地沿程均有磷释放现象。从经济和净化能力两方面考虑,建议湿地系统的水深保持在750 mm左右,长度至少为12 m。The purification effects of two constructed wetlands with horizontal subsurface flow and integrated flow under different water depths of 350 mm, 550 mm and 750 mm on urban surface runoff were investigated. The results showed that under different water depths, the pollutant concentrations de- creased along the path, and the purification effect of constructed wetland with integrated flow was better than that of constructed wetland with horizontal subsurface flow. The degradation of TN and NH3 - N under water depth of 350 mm mainly occurred at the first 12 m of the wetland, while the degradation of TN and NH3 - N under water depths of 550 mm and 750 mm The degradation of TP, DP and COD mainly occurred at mainly occurred at the first 6 m of the wetland. the first 6 m of the wetland, and the phenome- non of phosphorus release appeared in the beds of two constructed wetlands. Considering the economy and purification capacity, it is suggested that water depth of a wetland system should maintain at about 750 mm, and its length is 12 m at least.

关 键 词：地面径流 人工湿地 沿程浓度 最佳水深 

分 类 号：X703[环境科学与工程—环境工程]