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| Releases of Nitrogen and Phosphorus from Sediments from Nanfei River After Simulated Follow-up Dredging |
| Received:December 25, 2014 |
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| KeyWord:Nanfei River;sediment;follow-up dredging;nitrogen release;phosphorus release |
| Author Name | Affiliation | E-mail | | FU Yang | School of Resources and Environment, Anhui Agriculture University, Hefei 230036, China
Hefei Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, Hefei 230036, China | | | LU Yi | School of Resources and Environment, Anhui Agriculture University, Hefei 230036, China
Hefei Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, Hefei 230036, China | | | CHEN Song-song | College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China | | | YANG Shu-yun | School of Resources and Environment, Anhui Agriculture University, Hefei 230036, China
Hefei Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, Hefei 230036, China | | | WANG Feng-wen | School of Resources and Environment, Anhui Agriculture University, Hefei 230036, China
Hefei Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture, Hefei 230036, China | wfw2008@ahau.edu.cn | | YANG Chang-ming | College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China | cmyang@tongji.edu.cn |
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| Abstract: |
| Water quality monitoring has shown that nitrogen and phosphorus pollution is still severe in Nanfei River even if dredging has been conducted. Here a simulation experiment was carried out to examine the effect of follow-up dredging on the releases of nitrogen and phosphorus from the sediments using intact columns of the sediments that were previously in situ dredged. In the simulated dredging experiment, nitrogen and phosphorus in in situ dredged sediments showed alternative release and adsorption pattern with an interval of 7 d, and reached stability after one month. Our results indicate that follow-up dredging at a depth of 5.9 cm could restrain the releases of nitrogen and phosphorus from the sediments during the short term. |
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