Effects of iron-carbon microelectrolytic filler on denitrification in artificial wetlands with low carbon to nitrogen ratios
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.
artificial wetlandiron nanoparticlesmicroelectrolysisdenitrificationlow carbon to nitro-gen ratio
万方数据
维普
