摘要
南京玄武湖 1998年初实施了清淤疏浚工程 ,试图以此削减湖泊内源污染负荷 ,控制富营养化 .比较分析清淤前后( 1996～ 2 0 0 0年 )玄武湖沉积物中主要污染指标的变化 ,结果表明 ,清淤后的次年沉积物中总磷略有下降 ,但其后又呈现上升趋势 ;总氮在清淤后呈现明显的上升趋势 ;沉积物中重金属含量除Zn在局部湖区呈下降趋势外 ,其余重金属在清淤后均呈现上升趋势 ,Hg的上升趋势最为明显 ;Cu、Pb、Cd、Cr清淤前 ( 1996～ 1998年 )已经出现下降趋势 。
The sediment dredging was conducted for decreasing the pollution load and controlling the eutrophication in Xuanwu Lake in 1998. The monitoring results of total nitrogen (TN), total phosphorus (TP) and heavy metals in sediment were used to assess the effect of the dredging. Compared with 1998, TP content of the sediment decreased slightly in 1999, but increased in 2000. A continuous increase of TN content in sediment took place after dredging. At the same time, the pollution loading of heavy metals, such as Hg, Cu, Pb, Cd, Cr, has been rising since 1998. Especially, in 2000 Hg content in Northwestern part of Xuanwu Lake was 36 times as much as that in 1997 (before dredging).
出处
《南京师范大学学报（工程技术版）》
CAS
2004年第2期66-69,共4页
Journal of Nanjing Normal University(Engineering and Technology Edition)
基金
教育部青年教师奖励基金资助项目 ( 2 0 0 1JBC12 )
关键词
清淤
沉积物
总磷
总氮
重金属
玄武湖
dredging, sediment, total nitrogen, total phosphorus, heavy mental, Xuanwu lake
