首页 | 官方网站   微博 | 高级检索  
     

不同溶解氧水平下湖泊底泥-水界面磷交换影响因素分析
引用本文:龚春生,范成新.不同溶解氧水平下湖泊底泥-水界面磷交换影响因素分析[J].湖泊科学,2010,22(3):430-436.
作者姓名:龚春生  范成新
作者单位:1. 广东省环境科学研究院,广州,510045;清华大学深圳研究生院环境工程与管理研究中心,深圳,518055
2. 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京,210008
基金项目:国家自然科学基金,国家水体污染控制与治理科技重大专项项目 
摘    要:在实验室控制条件下,研究了玄武湖底泥在饱和溶解氧、75%、50%、25%、0%溶解氧水平下底泥-水界面磷交换,探讨了溶解氧对底泥-水界面磷交换的影响途径.结果表明:(1)上覆水溶解氧与玄武湖底泥溶解性磷酸盐、溶解性总磷释放速率呈开口向上的抛物线关系;(2)上覆水溶解氧水平可以决定磷在底泥-水界面交换中的转换方向,而且还影响间隙水中溶解氧扩散深度,25%、50%、75%和饱和溶解氧水平下溶解氧最大扩散深度分别为0.974cm、1.377cm、1.687cm和1.948cm,溶解氧在间隙水中最大扩散深度影响底泥-水界面的磷交换;(3)溶解氧可通过影响底泥-水界面处电位、藻类聚磷作用以及pH来影响底泥-水界面的磷交换.

关 键 词:溶解氧  底泥  磷交换  玄武湖
收稿时间:2009/4/15 0:00:00
修稿时间:2009/8/28 0:00:00

Effect factors analysis of phosphorus exchange across lake sediment-water interface un-der different dissolved oxygen concentration
GONG Chunsheng and FAN Chengxin.Effect factors analysis of phosphorus exchange across lake sediment-water interface un-der different dissolved oxygen concentration[J].Journal of Lake Science,2010,22(3):430-436.
Authors:GONG Chunsheng and FAN Chengxin
Affiliation:Guangdong Provincial Academy of Environmental Science, Guangzhou 510045, P. R. China;Research Center for Environmental Engineering and Management, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, P. R. China and State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
Abstract:The exchange of phosphorus across sediment-water interface of Lake Xuanwu under static state was studied in laboratory, and effect factors of phosphorus exchange across sediment-water interface were carried out under 100%, 75%, 50%,25% and 0% saturation dissolved oxygen concentration. The results showed that the relationship between dissolved total phosphorus and dissolved phosphorus release rate from sediment with dissolved oxygen concentration in overlay water was parabola. The direction of phos phorus exchange across sediment-water interface was decided by the dissolved oxygen. The maximum pervasion depth in pore water under different dissolved oxygen concentration influenced the phosphorus exchange amounts across sediment-water interface. Dissolved oxygen affect directly the electric potentials and algae absorbing phosphorus and pH value, then influenced the phosphorus exchange across sediment-water interface.
Keywords:Dissolved oxygen  sediment  phosphorus exchange  Lake Xuanwu
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《湖泊科学》浏览原始摘要信息
点击此处可从《湖泊科学》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号