天津市主要水体的氮污染特征分析  

Analysis of Nitrogen Pollution Characteristics in Water Bodies of Tianjin

作　　者：高翔[1] 蒙海涛[1] 易晓娟[1] 

机构地区：[1]天津市环境监测中心,天津300191

出　　处：《中国给水排水》2011年第15期51-55,共5页China Water & Wastewater

摘　　要：以天津市引滦河道、于桥水库及14条主要地表河流的氮营养盐监测结果为依据,研究了天津市主要水体的氮污染水平、特征、变化规律及主要来源。结果表明,天津市主要水体中氮营养盐的主要组成为溶解态无机氮。14条主要河流的TN年均浓度在1.45～11.7 mg/L之间,均值为4.16 mg/L;NH4+-N年均浓度在0.057～8.54 mg/L之间,均值为2.48 mg/L;NO3--N年均浓度在0.04～3.56 mg/L之间,均值为0.908 mg/L。其中,7条河流的氮污染主要来源于点源贡献,1条河流的氮污染主要来源于周边非点源贡献,4条河流同时受点源和非点源污染影响,2条河流的氮污染主要来源于上游来水。于桥水库的TN年均值为1.90 mg/L,且呈逐年显著上升的趋势;总体上看其氮污染主要来源于非汛期的引滦输水,但农田径流、农村生活污水以及畜禽养殖废水等非点源污染对于桥水库的影响仍不容忽视。Based on the monitoring results of nitrogen in Luan River Channel, Yuqiao Reservoir and 14 major surface rivers of Tianjin, the level, features, variation and main sources of nitrogen pollu- tion in the main water bodies of Tianjin were studied. The results indicate that nitrogen in the main water bodies is mainly composed of dissolved inorganic nitrogen. In 14 major rivers, the annual average content of TN is in the range of 1.45 to 11.7 mg/L, with an average of 4.16 mg/L; the annual average concen- tration of NH4＋ - N is in the range of 0. 057 to 8.54 mg/L, with an average of 2.48 mg/L ; and the annu- al average concentration of NO3 - N is in the range of 0.04 to 3.56 mg/L, with an average of 0. 908 mg/L. Nitrogen pollution in seven rivers mainly comes from the point source contribution; that in one riv- er mainly comes from surrounding non-point source contribution; that in four rivers comes from both point and non-point source pollution; an^t that in two rivers mainly comes from the upper reaches. The annual average value of TN in the Yuqiao Reservoir is 1.90 rag/L, showing a significant upward trend year by year. In general, the nitrogen pollution mainly comes from Luan River water in non-flood season. However, the influence of agricultural runoff, rural sewage, livestock wastewater and other non-point source on Yuqiao Reservoir can not be ignored.

关 键 词：地表水体 氮污染特征 总氮 溶解态无机氮 

分 类 号：X52[环境科学与工程—环境工程]