RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2009, Vol. 18 >> Issue (7): 674-.

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ON THE SEASONAL CHANGES OF HEAVY METALS AND NUTRIENTS IN SEDIMENTS FROM TONGLV RIVER

  

  1. 1.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes|Ministry of Education|Nanjing 210098|China；2.Department of Environmental Science and Engineering〖QS〗|Hohai University|Nanjing 210098|China
  • Online:2009-07-20

Abstract:

The characteristics of seasonal change for pollutants in the urban river can reflect the intensity and mode of human activities.It is effective to control pollutants by studying the rule of these changes.Based on the analysis of the total nitrogen (TN),total phosphorus (TP),organic matter (OM) and heavy metals in the sediments of Tonglv River in different polluted areas,the seasonal characteristics of the different areas of the urban river are showed.In No.1 area where TN,TP,OM and heavy metals are the highest in winter seasonal changes are obvious.In No.2 area,the contents of Cu,Zn are the highest of all the areas.In No.3 area,the contents of Pb,Cr,Cd are the highest of all the areas.It shows that the characteristics of seasonal changes are not so obvious in No.2 and No.3 areas because of the inconstant anthropogenic input.In No.4 area,the contents of pollutants are the lowest and TN,TP,OM,heavy metals are higher in autumn and winter than in spring and summer.Studies of the correlation between elements indicate that there is a good consistency between TN and OM,but it is various between OM and heavy metals.It is indicated that pollutants in sediments are disturbed markedly by human beings in urban rivers.

Key words: sediments, nutrients, heavy metals, seasonal variation, Tonglv River

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