Study on the Purification Effect of Different Roof and Facade Greening Substrates on Rainwater Runoff
Roof and facade greening infiltration system were simulated to study the purification effect of different roof greening substrates and facade greening substrates on rainwater runoff.The results showed that the pollutant removal rate of glass light stone+ceramsite+river sand was the highest,and the removal rates of total nitrogen(TN),ammonia nitrogen,total phosphorus(TP)and chemical oxygen demand(COD)were 41.31%,55.07%,43.65%and 36.36%,respectively.The purification effect of glass light stone+ceramsite as roof greening substrate was not good.The removal rate of TP by glass light stone+ceramsite+peat soil and peat soil was more than 90%,but the removal efficiency of nitrogen was not high.The purification effect of biochar and non-soil was better in the facade greening substrate.The removal rates of ammo-nia nitrogen and TP by biochar were 98.45%and 92.93%,respectively.The removal effects of nitrogen and phosphorus by rock wool,rock wool+glass light stone and carbon wool were worse.The removal rates of TN and ammonia nitrogen by rock wool treatment were-20.42%and 5.06%,respectively.While,the removal rates of TN and TP by rock wool+glass light stone were negative.
万方数据
维普
