In order to investigate the influence of iron and carbon microelectrolysis on denitrification in artificial wetland system,this study utilized liquid phase reduction method to obtain activated car-bon surface-loaded Fe0 material,and constructed vertical flow artificial wetland simulation pilot devices with different filler dosage ratios,which were No.1 pure gravel,No.2 gravel+3％iron and carbon,No.3 gravel+8％iron and carbon,respectively,and observed the daily inlet and outlet water quality.The results show that:at the initial stage of addition,the removal effect of No.2 and No.3 devices on nitrate-nitrogen is remarkable,and almost all of them can be transformed;Fe ele-ment on the surface of filler will have certain loss along with the water flow,and the larger the dosage is,the higher the loss is;the quality of effluent from the two devices reached a stable state after 18d and 21d,and the concentration of nitrate-nitrogen was stabilized at 11 mg/L and 13 mg/L,which is a little lower than that of the blank device.
关键词
人工湿地/纳米铁/微电解/反硝化/低碳氮比
Key words
artificial wetland/iron nanoparticles/microelectrolysis/denitrification/low carbon to nitro-gen ratio
维普
万方数据