Ammonia nitrogen is one of the important pollutants in urban rainfall. Though
iron ions and aluminum ions as a filler for plant retention system have a
good effect on the removal of ammonia nitrogen, their adsorption
characteristics was rarely studied. This paper uses different media (sand,
iron powder, aluminum powder) with different pH values and ionic strengths
in the Bioretention system to study the adsorption mechanism of ammonia
nitrogen in an artificial rainwater. The result shows that Langmuir
isothermal adsorption model is more in line with the ammonia nitrogen
adsorption process, and the sand has the best adsorption capacity among
three samples. Effect of pH values on adsorption kinetics is also studied.
Adsorption characteristics of recycled construction waste particles for ammonia-nitrogen in rainfall runoff
