Comparison between the lower Nansi Lake and its inflow rivers in sedimentary phosphorus fractions and phosphorus adsorption characteristics

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• 作者：Zhi-bin Zhang (1) zhazhb@163.com
  Xiao-bo Tan (1)
  Lei-lei Wei (1)
  Shi-miao Yu (1)
  Dao-ji Wu (1)
• 关键词：Inflow rivers &#8211 ; Nansi Lake &#8211 ; Phosphorus adsorption characteristics &#8211 ; Sedimentary phosphorus fractions
• 刊名：Environmental Earth Sciences
• 出版年：2012
• 出版时间：July 2012
• 年：2012
• 卷：66
• 期：5
• 页码：1569-1576
• 全文大小：480.1 KB
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• 作者单位：1. College of Environmental and Municipal Engineering, Shandong Architecture University, Jinan, 250101 China
• 刊物类别：Earth and Environmental Science
• 刊物主题：None Assigned
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-6299

文摘

There were many differences between rivers and lakes such as flow velocity, hydraulic retention time, water vegetation community and other chemical-physical factors that may lead to different characteristics of sedimentary phosphorus. In our research, sedimentary phosphorus fractions and its phosphorus adsorption differences between the lower Nansi Lake and its main inflow rivers were compared. The results showed that the contents of NaOH-P, Org-P, IP-P, and TP in lake sediments were obviously higher than those in its inflow river sediments while HCl-P had no obvious difference between them. Based on analysis, the unstable NaOH-P would accumulate in lake sediments, while it is difficult for it to retain in sediments of rivers because of a high frequency of flood flows and unstable bed sediments. In addition, water vegetation communities were helpful in the accumulation of Org-P in lake sediments. From phosphorus adsorption experiments results, the Ceqc (equilibrium concentration of phosphorus release/adsorption) of lake sediments was higher than that of river sediments. It was indicated that sedimentary phosphorus would be more easily released from lake sediments than river sediments. So in future more work should be focused on internal P loading from lake sediments release.