我们生活中的磷污染.ppt

assessment of the effect of wide utilization of detergents containing phosphorus presented by Sun Xiaoxu No. 200800180151 assess v.评价；评估→assessment n.utilize v.使用；运用→utilization n.phosphorus n.磷detergent n.清洁剂 de+terg(擦)+ent water eutrophication 水体富营养化 主要造成水体污染-----富营养化definitioneutrophication is defined as an increase in the rate of supply of organic matter in an ecosystem  赤潮 red tide water eutrophication water eutrophication water bloom 2007/07/06 江苏·无锡 2007/07/06 江苏·无锡 2007/07/06 江苏·无锡 water eutrophication two types of water eutrophication natural eutrophication culture eutrophication natural eutrophication cultural eutrophication P N source of extra P 城市生活污水 农业、畜牧业污水 工业污水 矿区地表径流 大气降沉 生活污水 表面活性剂 洗涤剂 洗涤助剂：三聚磷酸钠 三聚磷酸钠 Na5P3O10 Sodium Tripolyphosphate agricultural runoff 进入地表水体的磷污染源比例构成(欧洲12?国平均)(Morse,1993) The ficticious Pinga Lake in Camelot has a surface area of 9.34×107m2and depth of 10 m. The lake receives a yearly average of 107cm of precipitation（n.降水）. The lake receives phosphorus from the following sources. 1、 the wastewater treatment plant for the city of Astrid discharges into the lake. The average usage of the city is 350L/capita·day. There are 54,000 residents(n.居民) of this city. The total phosphorus level in the sewage influent (下水道系统) is 10mg·L-1(yearly average). The wastewater treatment plant removes 90% of the phosphorus. 2、 The city has recently renovated（v.改革） its sewage collection system, seperating the storm water from the sewage, installing a combined sewer system. The storm water is discharged into the lake after treatment through a sand filter（过滤器） that removes 50% of the phosphorus. The storm sewer serves an area that is 9.5 km2, having a runoff coeffieient of 0.40. The phosphorus concentration in the untreated storm water is 0.75mg·L-1.3 、The lake is fed by a pristine st