Removal of dissolved nitrogen, phosphorus and carbon from stormwater by biofiltration mesocosms
Removal of dissolved nitrogen, phosphorus and carbon from stormwater by biofiltration mesocosms
复制标题
DOI：
10.2166/wst.2007.108
复制
发表时间：
2007-01-01
影响因子：
2.7
通讯作者：
Phillips, I.
中科院分区：
文献类型：
--
作者：
Henderson, C.;Greenway, M.;Phillips, I.
生物过滤系统正成为一种流行的雨水处理装置，在水敏感的城市设计，从雨水中去除细颗粒物和溶解污染物。然而，关于这些系统去除营养物的有效性的公开数据有限。我们构建了生物过滤围隔生态系统，以评估在实验条件下营养物质（氮，磷和碳）的去除。不同类型的媒体进行了比较（砾石，沙子，砂壤土）在植被和非植被的围隔（共6个治疗）。使用了五种植物。植被砂和植被砂壤土提供了最好的整体治疗。植被围隔生态系统是非常有效的去除氮（63-77%的去除）和磷（85-94%的去除）从合成雨水，并删除实质上比非植被处理更多的营养物质。所有处理都从雨水中去除了相当大一部分碳（28-66%）。当用自来水冲洗时，氮和磷被植物围隔所保留，但从非植物围隔中浸出。植物生长在砂壤土基质中最旺盛，表明这是一种良好的生长基质，即使不添加有机物质。
Biofiltration systems are becoming a popular stormwater treatment device in water sensitive urban design for the removal of fine particulate and dissolved pollutants from stormwater. However, there is limited published data on the effectiveness of these systems for nutrient removal. We constructed biofiltration mesocosms to assess nutrient removal (nitrogen, phosphorus and carbon) under experimental conditions. Different types of media were compared (gravel, sand, and sandy-loam) in vegetated and non-vegetated mesocosms (six treatments in total). Five plant species were used. Vegetated sand and vegetated sandy-loam provided the best overall treatment. Vegetated mesocosms were very effective in removing nitrogen (63-77% removal) and phosphorus (85-94% removal) from synthetic stormwater, and removed substantially more nutrients than the non-vegetated treatments. All treatments removed a substantial portion of the carbon from the stormwater (28-66%). When flushed with tap water, nitrogen and phosphorus were retained by the vegetated mesocosms, but leached from the non-vegetated mesocosms. Plant growth was most vigorous in the sandy-loam media, indicating that this is a good growth media, even without the addition of organic matter.