Abstract
Sediments and surface water were sampled in a tide flat in the Huiquan Bay, Qingdao, China in January 2004 to simulate the exchange of NH4-N/NO3-N/PO 3−4 between sediments and surface water. A working system was designed with which samples were shaken at 60, 120 and 150 revolutions per minute (r/min). Experiment results show that NH4-N concentration in water at shaking rate of 60 r/min decreased gradually, while at 120 r/min increased gradually. In resuspension, fine-grained sediments contributed most NH4-N to the seawater, followed by medium-grained and coarse-grained sediments. The NO3-N concentration in water had a negative relation with the shaking rate; the medium-grained sediments contributed more NO3-N to seawater than the coarse-and fine-grained sediments. The PO 3−4 concentration is positively related with the shaking rate, the fine-grained sediments were the main N and P contributor to the seawater, followed by medium-and coarse-grained sediments.
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Supported funded by the knowledge Innovation Key Program of the Chinese Academy of Sciences (No. KZCX1-SW-01-08) and the National Key Project for Basic Research of China (Contract No. 2007CB407305)
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Wang, P., Song, J., Guo, Z. et al. The release behavior of inorganic nitrogen and phosphorus in sediment during disturbance. Chin. J. Ocean. Limnol. 26, 197–202 (2008). https://doi.org/10.1007/s00343-008-0197-y
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DOI: https://doi.org/10.1007/s00343-008-0197-y