the combination
of different faThe results in Figure 1 show the obtained removal of Zn
in each of the experimental units considering the combination
of different factors like type of plant species, different
size of filter media, and the HRT employed.
It was observed that in the 24 hour HRT, the best Zn
removal achieved in units 1, 2, 5 and 6 was 89% and the
lowest removal observed was in unit 3 (considered as
control with fine gravel support media (FG) and without
plants) with 79%.
The decreased removal percentage observed in the 48ctors