ZHU Ai-mei, YE Si-yuan, LU Wen-xi, WANG Hong-jin. GEOCHEMISTRY OF NITROGEN,PHOSPHORUS AND IRON AT THE WATER-SEDIMENT INTERFACE IN JIAOZHOU BAY[J]. Marine Geology & Quaternary Geology, 2006, 26(6): 55-64.
Citation: ZHU Ai-mei, YE Si-yuan, LU Wen-xi, WANG Hong-jin. GEOCHEMISTRY OF NITROGEN,PHOSPHORUS AND IRON AT THE WATER-SEDIMENT INTERFACE IN JIAOZHOU BAY[J]. Marine Geology & Quaternary Geology, 2006, 26(6): 55-64.
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GEOCHEMISTRY OF NITROGEN,PHOSPHORUS AND IRON AT THE WATER-SEDIMENT INTERFACE IN JIAOZHOU BAY

  • 1 College of Environment and Resources, Jilin University, Changchun 130026, China;

  • 2 Qingdao Institute of Marine Geology, Qingdao 266071, China;

  • 3 China University of Geosciences, Wuhan 430074, China

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  • Received Date: June 18, 2006
  • Revised Date: August 26, 2006
    Graphical Abstract
    • Abstract
  • Concentrations of DO, TN, TP, DIN, PO4-P,and Fe in bottom water,DIN, PO4-P and Fe in interstitial water and grain size and organic carbon in surface sediments of the Jiaozhou Bay are analyzed. With the exception of NH4-N, the interstitial water shows NO3-N concentration 17.8 times,NO2-N 9.3 times,PO4-P 12.5 times,and Fe 7.7 times higher than the counterparts of the bottom water. The authors conclude that there is a trend of element releasing from interstitial water into the overlying bottom water. Laterally,concentrations of NO3-N, NO2-N, NH4-N,and PO4-P in both the interstitial and bottom water as well as Fe in the sediments in the east of the Jiaozhou Bay are higher than those in the west, while the distribution of Fe in both the interstitial and bottom water seems opposed. The results suggest that N, P,and Fe contents in bottom water are mainly controlled by the proximity to the estuary of the east Jiaozhou Bay due to the industrial and agricultural waste discharge and decomposition of marine organism, while the diffusion of the above elements from the interstitial water into the overlying bottom water is significant, and hydrodynamical factor and grain size of sediments should marginally affect the distributions of N, P,and Fe. Moreover, correlation analysis indicates that concentrations of N and P in both bottom and interstitial water are correlated with DO in bottom water,and with organic carbon and Fe in sediments respectively.
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    • References (20)
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