journal6 ›› 2015, Vol. 36 ›› Issue (6): 62-68.DOI: 10.3969/j.cnki.jdxb.2015.06.015

• Biological and chemical • Previous Articles     Next Articles

Influential Factors on Nitrogen Migration and Transformation in Sedimen-Water Interface in the Dongjiang River

 XIONG  Lei, PENG  Qing-Jing, YANG  Li-Ping   

  1. (1 College of Biology and Environmental Sciences,Jishou University,Jishou 416000,Hunan China;2 South China Institute of Environmental Sciences,Ministry of Environmental Protection,Guangzhou 510655,China)
  • Online:2015-11-25 Published:2015-12-23

Abstract: This paper studies the nitrogen distribution in overlying water and sediment in the Dongguan segment of Dongjiang River.The indoor column experiment of nitrogen exchange between overlying water and sediment was conducted,and the influential factors on the nitrogen migration were investigated.The results indicated that TN concentration ranged from 2.13 to 4.48 mg/L,and nitrate was found to be the main form of contaminant,which accounted for 64.9% of TN.Sediment is an important source for ammonium and a sink for nitrate and nitrite.Illumination and disturbance are conducive to decrease the concentration of ammonia nitrogen;and higher temperature and initial pH value are conducive to the transformation of ammonia nitrogen.

Key words: The Dongjiang River, sediment-water interface, diffusion flux;influential factors

WeChat e-book chaoxing Mobile QQ