矿冶废弃物填料对生活污水的吸附性能研究

Research on Adsorption Capability of Mining and Metallurgical Wastes for Domestic Wastewater

填料是人工湿地的主要组成部分,通过实验研究了粉煤灰、钢渣、高铁尾矿、铁尾矿、铁屑五种产量较大的矿冶废弃物作为人工填料对生活污水中TP、TN及COD的吸附性能。结果显示,24h内五种填料对污染物的去除随投加量的增加而增大。五种填料对TP的吸附比较明显,其中粉煤灰和钢渣去除效率最高,10min内去除效率可达90%以上。同时发现五种填料对TN、COD的吸附效果不理想,在24h内TN和COD去除率最高的均为钢渣,分别为15.73%和12.38%。

Substrate is a major component of constructed wetland.The adsorption capability of five mining and metallurgy wastes（fly ash,steal scoria,two Fe mine tailings,iron shaving） in constructed wetland for TP,TN and COD in domestic wastewater was studied by experiment.The results showed that the removal efficiency of contaminants increase with the dosage of substrates.In addition,the adsorption of these substrates for TP was obvious,and the removal efficiency of fly ash and steel scoria was up to 90% in 10 min.In the meanwhile,it was found that the adsorption of these substrates for TN and COD was not ideal.The steel scoriae had the highest removal efficiency for TN and COD,which was 15.73% and 12.38% in 24 hours respectively.