土壤过滤净化氮氧化物实验研究

实验考察了土壤类型、进口浓度、温度和过滤气速对净化氮氧化物废气效果的影响。结果表明 ,土壤过滤能够有效削减NOx 污染 ,对NO2 的净化效率可达 90 %以上 :肥沃土壤的净化效率明显高于贫瘠土壤 ,适宜作为过滤介质 ;在实验浓度范围内 ,净化效率基本随着进口浓度的提高而提高。当进口浓度高于 2mg m3时 ,净化效率基本稳定在95 %左右 ;温度的升高对提高去除率是有利的 ,而且对延长土壤滤池有效使用时间有很大帮助 ;在实验范围内气速的提高对NO2 去除率影响不明显。

TREATMENT OF NITROGEN OXIDE WITH SOIL FILTRATION

The biological treatment of nitrogen oxide in waste gas by soil filtration was investigated.The study focused on the effect of soil,input concentration,temperature and air velocity through reactor.The experiment result demonstrated that pollution caused by nitrogen oxide can be controlled by soil filtration.The removal efficiency of nitrogen dioxide was above 90%.Enrichment soil was better than poor soil as filtration medium.The removal efficiency was increased with increasing of input concentration,when input concentration higher than 2 mg/m 3,the removal efficiency was around 95%.The increasing of temperature was of benefit to the removal efficiency.On the other hand,it also prolonged the operation time of soil filter.In the range of the experiment,the increasing of gas velocity in the reactor didn't decrease the removal efficiency of NO X.