溶解氧对底泥中氨氮释放的影响

Influence of Dissolved Oxygen in Ammonia Release in Sediment

本次实验通过自制的柱状底泥模拟实验装置,研究了溶解氧对城市内河底泥中氨氮的转化规律。结果表明:(1)溶解氧是影响底泥中氮转化的主要因素,好氧环境条件下氨氮的转化率较厌氧条件下高;(2)不同的溶解氧浓度对氨氮的转化时间和程度不同,较高的溶解氧水平使氨氮发生转化的时间少于较低溶解氧水平的。基于本次研究结果,为治理城市内河污染提供科学依据,对保护内河水环境和生态系统有较大的实际意义。

The sediment column experiments made by simulation equipment,study the dissolved oxygen in the sediment of urban Inland river and transformation of ammonia.The results show that,（1）Dissolved oxygen is the conversion of nitrogen in the sediment of the main factors,the conversion of ammonia under anaerobic conditions is higher than Aerobic environment;（2）Dissolved oxygen concentration of ammonia of different time and different levels of transformation.High level of dissolved oxygen to ammonia conversion occurs in less than a lower level of dissolved oxygen.Based on the results of this study,to control pollution of the city to provide the scientific basis for Inland river,the protection of the environment and ecosystems within the river have a greater practical significance.