Heavy metals Dilution of leachate 100% 50% 30% 20% 10% Copper (Cu) 96.7 – Not detected Not detected Not detected Chromium (Cr) 43.5 0 60 33.3 – Lead (Pb) Not detected Not detected Not detected Not detected Not detected Nickel (Ni) 33.3 0 22.2 0 85 Zinc (Zn) 36.6 0 41 89.7 99.4

Table 5: Percent removal heavy metals from GPL compared to the controls (in the light and under shaking conditions)