Earth Science Frontiers ›› 2008, Vol. 15 ›› Issue (5): 227-234.

• Article • Previous Articles     Next Articles

Influence of dissolved oxygen in overlying water on releasing/absorption of phosphorus from sediments from Suzhou river, east China.

  

  1. 1School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083, China 2College of Environmental Science and Engineering, Hohai University, Nanjing 210098, China
  • Online:2008-05-02 Published:2008-05-02

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Abstract:

 The influence of different levels of dissolved oxygen (anaerobic, aerobic and natural) in overlying water on the release or absorption of phosphorus from sediment was studied under static state in laboratory without outer input. Through the experiment, we conclude that phosphorus is apt to release from sediment under anaerobic condition (DO<05 mg/L); on the other hand, maintaining higher level of DO (DO>50 mg/L) in water is essential for controlling the release of phosphorus from sediment. Therefore, we should control the quantity of oxygen consumers and increase the level of dissolved oxygen to improve the water quality and to reduce the phosphorus release from sediment.

Key words:

Key words: dissolved oxygen; sediments; phosphorus; release; absorption

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