巢湖底泥释放特性研究

Study on characteristics of the sediment release in Chaohu Lake

通过对巢湖底泥氮、磷释放特性进行室内静态模拟试验研究,分析底泥上覆水不同温度、不同p H值以及上覆水扰动与否和是否种植水生植物等不同条件下巢湖底泥的总氮和总磷释放特性。结果表明:随着温度升高,有利于底泥污染物质的释放;p H为中性条件,不利于底泥污染物质的释放;扰动上覆水可加速底泥中污染物质释放,对消除水体TN效果明显,而对消除水体TP效果不明显;种植水生植物凤眼莲可促进底泥中污染物质的释放,改善水体质量。

Through the indoor static simulation test on the nitrogen and phosphorus released characteristics of the sediment in Chaohu Lake, the released characteristics of TN and TP in the sediment of Chaohu Lake under different conditions such as different tempera- tures, different pH values and the disturbance of overlying water and whether the aquatic plants were planted on the sediment were ana- lyzed. The results show that it is beneficial to the release of sediment contaminants with increasing temperature, that when pH is neu- tral, which is not adverse to the release of sediment pollutant, while disturbing overlying water can accelerate the release of pollutant in the sediment, and the effect of eliminating the water body TN is obvious, but the effect of eliminating the water body TP is not obvious and that when we plant the aquatic plants ,it is good for the release of pollutant in sediment and the improvement of water quality.