Estimation of Nitrogen and Phosphorus Release Rates at Sediment-Water Interface of Nansi Lake, China

Abstract:

At present, Nansi Lake restoration is maily focused on reducing extraneous pollution, however, it is unclear about the endogenous pollution. In this study, twelve intact sediment cores were collected from four sub-lakes (Nanyang Lake, Dushan Lake, Zhaoyang Lake and Weishan Lake) in Nansi Lake, and the fluxes of NH4+-N, PO43--P, NO3--N, TN and TP at sediment-water interface were calculated based on static incubation of sediment cores with a laboratory-scale benthic chamber. The incubation results showed fluxes of PO43--P, NO3--N, TN and TP in Nanyang Lake were the highest and as follows: 2.73, 7.55, 44.43 and 3.06 mg/m2.d, respectivly, and the flux of NH4+-N in Nanyang Lake, Dushan Lake and Zhaoyang Lake had little difference ranged from 8.99 to 10.19 mg/m2.d. This study indicated that during the sampling period sediment acted as a source of nitrogen as well as phosphorus to the overlying water body in Nansi Lake.

• Periodical: Advanced Materials Research (Volumes 573-574)
• Pages: 573-577
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.573-574.573
• Online since: October 2012
• Authors: Bao Li, Zhi Qi Wang
• Keywords: Nansi Lake, Nitogen Release Rates, Phosphorus Release Rates, Static Incubation

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