安徽农业科学2011，Vol.39Issue(9)：5175-5177,5366,4.
溶氧·水温和水流对东太湖沉积物中氮·磷释放的影响
Effect on the Release of Nitrogen and Phosphorus from Sediment of the East Taihu by Dissolved Oxygen, Water Temperature and Currents
摘要
Abstract
[ Objective ] The aim was to research the endogenous pollution intensity of the East Taihu Lake. [ Methed ] The effects were analysed on the release of nitrogen and phosphorus from sediment of the east Taihu for the environmental factors, such as dissolved oxygen, water temperature and the flow by laboratory simulation experiments. [ Result ] The results showed that the nitrogen, phosphorus concentrations of the overlying water were increased linearly with time in different dissolved oxygen (DO) and water temperature conditions. When dissolved oxygen in the concentration of 3.0, 5.5, 8.0 mg/L, the average release rate of nitrogen accordingly reached 443,239, 153 me/( m2 × day) ,the average release rate of phosphorus reached 33.2, 17.8, 12.1 mg/(m2 × day). When the water temperature were in 15, 25 ,35 ℃, the average release rate of nitrogen respectively reached 81、169、301 mg/( m2 × day), the average release rate of phosphorus reached 8.7、15.8、19.3mg/( m2 × day); When the flow rate was different, nitrogen, phosphorus concentrations of the overlying water would increase linearly with time and tended to be in balance after 120 hours; When the water flow at the rate of 0.02, 0.04 ,0.08 m/s, the average release rate of nitrogen were 45, 78, 161 mg/( m2 × day) in 96 hours, the average release rate of phosphorus were 1.8, 7.5, 16.8 mg/( m2 × day) in 96 hours.[Conclusion]The Nitrogen, phosphorus release rates from the sediment increased with the dissolved oxygen reducing, water temperature and flow increasing and the effect of the dissolved oxygen was the greatest.关键词
东太湖/沉积物/溶解氧/水温/水流Key words
East Lake/ Sediment/ Dissolved oxygen/ Water temperature/ Flow分类
资源环境引用本文复制引用
徐升宝,谷孝鸿,蔡春芳,叶元土,施陈江,杨超..溶氧·水温和水流对东太湖沉积物中氮·磷释放的影响[J].安徽农业科学,2011,39(9):5175-5177,5366,4.基金项目
水体污染控制与治理科技重大专项(2008ZX07101-012) （2008ZX07101-012）
中国科学院知识创新工程项目(KZCX1-YW14). （KZCX1-YW14）
