【摘要】 城市地表径流是非点源污染的主要来源,磷作为主要污染物之一,被认为是水体富营养化的主要因素。生物滞留设施能有效通过沉淀、过滤、吸附以及生物过程达到对地表径流中污染物的处理。通过实验方法对比研究在生物滞留设施填料层中添加铁粉和纳米铁对磷的去除效果,讨论了铁质放置位置、采样时间以及材料种类对渗流中磷的去除效果的影响。通过对比放置在不同位置的去除率,得出铁质放置在中层对磷有较好的去除效果。通过将铁质放置在中层,研究了磷的去除率随时间的变化以及不同材料对磷的去除率的影响。更多还原

【Abstract】 Urban surface runoff is the primary source of nonpoint source pollution,phosphorus as one of the main pollutants,is considered to be the major factor of water eutrophication.Through the bioretention facilities,the pollutants in surface runoff can be treated by precipitation,filtration,adsorption and biological processes.The experiment studied the removal effect of phosphorus when iron was added to the filling layer of bioretention facilities.The effect of iron placement,sampling time and material type on the removal efficiency of phosphorus in runoff was discussed.By comparing the removal rate in different placement,it is concluded that iron is placed in the middle of the filling layer had good removal efficiency for phosphorus.By placing the iron in the middle,the change of phosphorus removal rate with time and the effect of different materials on the removal rate of phosphorus were studied.更多还原