磷酸氨镁沉淀法降解水体中微量氨氮

Ammonia-magnesium phosphate precipitation degrades the trace ammonia nitrogen in water

研究磷酸氨镁沉淀法降解水体中的微量氨氮,探讨反应时间、NH4^+/PO4^3-/Mg^2+摩尔比等因素对氨氮降解效果的影响。结果表明,在氨氮初始浓度为2μg/mL的1 L模拟水体中,优化反应条件为投入N、P、Mg的摩尔比为1∶1.1∶1.4,反应时间为90 min,水中氨氮去除率可以达78.12%。当将其运用到九曲河水的氨氮降解时,由于水体中含有各种杂质,导致水体中氨氮降解率下降,为70.02%。

The degradation of trace ammonia nitrogen in water by ammonia-magnesium phosphate precipitation method was studied,and the effects of reaction time,NH4^+/PO4^3-/Mg^2+ molar ratio and other factors on the degradation of ammonia nitrogen were discussed.The results showed that when 1 L of ammonia nitrogen in water when the initial concentration of 2μg/mL,to optimize the reaction conditions as follows:Input N,P,Mg of the mole ratio of 1∶1.1∶1.4,the reaction time of 90 min,the water ammonia nitrogen removal rate can reach 78.12%.When it was applied to the ammonia nitrogen degradation of Jiuqu river,the degradation rate of ammonia nitrogen in water was reduced to 70.02% due to the various impurities in the water.