Journal of East China Normal University(Natural Sc ›› 2011, Vol. 2011 ›› Issue (1): 12-20.

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Characters and evaluation of nitrogen pollution in the water and surface sediment from six urban lakes in Beijing

CHEN Jian-jun 1,2, HUANG Min-sheng 1, LU Shao-yong 2, ZHAO Yi-kun 3, WU Yun 3, HUANG Guo -zhong 3   

  1. 1. School of Resources and Environment Science, East China Normal University, Shanghai 200062, China;  2. State Environmental Protection Key Laboratory for Lake Pollution Control, Research Center of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; 3. Civil and Environment Engineering School, University of Science ＆ Technology Beijing， Beijing 100083, China
  • Received:2010-08-01 Revised:2010-11-01 Online:2011-01-25 Published:2011-01-25
  • Contact: HUANG Min-sheng

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Abstract: The pollution characters, degree and correlations of the indexes in water and surface sediments from six lakes in Beijing were investigated to provide data for the eutrophication control of urban lakes. Results showed that nitrogen pollution of these urban lakes was serious, and the water total nitrogen (TN) of three lakes were all worse than that of National Environment Quality Standard for Surface Water Grade V during the investigation period. According to the Taihu Lake Basin Pollution Standard, the organic nitrogen content （ON%） pollution from the surface sediment of the six lakes were very serious: the minimum from which was three times of the pollution standard level. According to the standard of Canada, the ecological toxic of sediments TN from two lakes were both above serious toxicity standards, while that of other three lakes were all near to the serious toxicity standards. The correlation of nitrogen fractions and TOC content between index of water and surface sediment from the six urban lakes were calculated, and the results showed that the correlation between sediment TN and sediment TOC was the highest ( r =0.965, p <0.01), correlations between water TN and sediment TN and TOC was extremely significant ( p <0.01) as 0.960, 0.964, respectively. The investigation suggested that the control and reduction of TOC and TN in surface sediment (0~10 cm) of urban lake are of important significance to the control of nitrogen pollution in the lake water.

Key words: nitrogen fractions, sediment, pollution, urban lakes, nitrogen fractions, sediment, pollution

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