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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2003, Vol. 4 Issue (3): 358-362    DOI: 10.1631/jzus.2003.0358
Chemical and Biotechnology     
Effects of pH and Eh on release of nitrogen and phosphorus from sediments of West Lake
HU Qin-hai, ZHU Yin-mei, SONG Jing, LI Zhen-yu, WEN Jun-jie
College of Environment and Resources, Zhejiang University, Hangzhou 310029, China
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Abstract  The effects of pH and Eh on release of nitrogen and phosphorus from sediments of West Lake under different conditions were investigated by simulation test. Results showed that the net flux of NH4+-N release from sediments increased with pH, but NO3--N showed negative-going release at all tested pH levels. The net flux of NH4+-N release from sediments was higher under anaerobic or aerobic condition of the overlying water, but only under aerobic condition would net release of NO3--N occur. It was also shown that phosphorus released was mainly in its inorganic form, higher pH and anaerobic conditions of overlying water greatly stimulated release of phosphorus. In situ measurement at several West Lake locations indicated that sediment resuspension induced by boat propeller stimulated nutrients release from sediment into overlying water.

Key words： West Lake      Sediments      Nitrogen      Phosphorus     
Received: 02 July 2002     
CLC:  XI524  
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HU Qin-hai
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LI Zhen-yu
WEN Jun-jie
Cite this article:

HU Qin-hai, ZHU Yin-mei, SONG Jing, LI Zhen-yu, WEN Jun-jie. Effects of pH and Eh on release of nitrogen and phosphorus from sediments of West Lake. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2003, 4(3): 358-362.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2003.0358     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2003/V4/I3/358

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