Replication No. | Mean | % mean removal | |||||||
1 | 2 | 3 | |||||||
Before | After | Before | After | Before | After | before | After | ||
Cu (mg/l) | 0.12 | 0.02 | 0.08 | 0.00 | 0.03 | 0.01 | 0.0767 | 0.01 | −87% |
Zn (mg/l) | 2.30 | 0.20 | 3.72 | 0.21 | 5.06 | 0.73 | 3.69 | 0.38 | −90% |
Pb (mg/l) | Below detection limit (BDL) | BDL | BDL | BDL | BDL | BDL | BDL | BDL | - |
Cr (mg/l) | BDL | BDL | BDL | BDL | BDL | BDL | BDL | BDL | - |