| Metal (mg/l) | School | ||
A | B | C | ||
Concentration present | Cu | 49.88 ± 0.67 | 60.46 ± 3.14 | 32.48 ± 1.44 |
Pb | 27.72 ± 1.37 | 68.56 ± 0.70 | 52.62 ± 2.08 | |
% adsorption | Cu | 45.80 | 15.80 | 68.98 |
Pb | 62.18 | 59.06 | 85.45 |