| Heavy metals (μg/L) |
Percent of Leachate in Incubation Medium |
| 100% |
50% |
30% |
20% |
10% |
| Before |
After |
Before |
After |
Before |
After |
Before |
After |
Before |
After |
| Copper (Cu) |
30 |
30 |
3 |
7 |
<1 |
<1 |
<1 |
<1 |
<1 |
<1 |
| Chromium (Cr) |
22 |
21 |
11 |
12 |
60 |
60 |
30 |
40 |
<1 |
<1 |
| Lead (Pb) |
<10 |
<10 |
<10 |
<10 |
<10 |
<10 |
<10 |
<10 |
<10 |
<10 |
| Nickel (Ni) |
350 |
320 |
170 |
180 |
100 |
100 |
70 |
120 |
100 |
100 |
| Zinc (Zn) |
7,930 |
7,290 |
4,230 |
4,300 |
2,640 |
2,640 |
1,600 |
2710 |
270 |
370 |
|
