溶解氧对贾鲁河底泥中氮释放的影响

Effects of Dissolved Oxygen on Nitrogen Release from Jialu River Sediment

[目的]研究溶解氧对贾鲁河底泥中氮释放的影响。[方法]结合贾鲁河(郑州段)污染现状,通过原始柱状底泥模拟试验,研究了溶解氧对贾鲁河底泥中氮转化的影响。[结果]溶解氧是影响贾鲁河底泥中氮转化的主要因素,不同溶解氧浓度对氨氮、亚硝酸盐氮、硝酸盐氮的转化时间和效率的影响不同。好氧环境条件下,氨化、亚硝化、硝化作用进行较彻底,氨氮、亚硝酸盐氮、硝酸盐氮的转化时间少于厌氧环境,其转化效率高于厌氧环境。[结论]该研究为贾鲁河水污染治理提供了科学参考。

[Objective]The aim was to study the effects of dissolved oxygen（DO） on nitrogen release from Jialu River sediment.[Method] Based on the current pollution status of Jialu River（in Zhengzhou）,through simulation test of original columnar sediment,the effects of dissolved oxygen on nitrogen transformation in Jialu River sediment were analyzed.[Result]DO was the main impact factor of nitrogen transformation in Jialu River sediment,and different DO concentrations had various effects on the transformation time and efficiency of ammonia nitrogen,nitrite nitrogen and nitrate nitrogen.Under aerobic environment,ammoniation,nitrosification and nitrification were carried out completely,and the transformation time of ammonia nitrogen,nitrite nitrogen and nitrate nitrogen was less than that under anaerobic environment,while the transformation efficiency was higher than that under anaerobic environment.[Conclusion]The study could provide scientific references for the water pollution control in Jialu River.