水中氨氮、亚硝酸盐氮及硝酸盐氮相互关系探讨

在水中,氮既是生命元素,又是环境污染的主要因子,其转化是多变的,其中硝化作用和反硝化作用是关键反应,它将较稳定的 NH4^＋转化成 NO3^-,后者容易渗滤,被植物吸收或进一步脱氮。用河水进行了实验室试验,研究了氨氮、亚硝酸盐氮及硝酸盐氮三者的相互关系。观察了亚硝化作用和硝化作用的历程,描述了其变化规律,并对其在水中的迁移、转化过程及机理结合文献进行了研究讨论。根据实验结果,对今后的研究方向和污水的排放标准提出了建议。

A Discussion on Relationship of Nitrogen in Forms of Ammonium, Nitrite and Nitrate in Water

In water,nitrogen is a biological element as well as a main factor of the environmental pollution. Of its variable converted forms,the nitrification and denitrification are key reactions to turn a rather stable NH_4~+ into NO_3~-,which is ready to be osmosized and absorbed by plants or further denitrified.The relationship among NH_3-N,NO_3~--N and NO_2~--N was studied by river water testing in a laboratory.Through observing the course of nitrosification and nitrification processes,their variation patterns were described,and the nitrogen migration and converting process in water were discussed.Based on the tests,the further study and wastewater discharge standard were proposed.