| Sampling time |
Lead (mg/L) |
Copper (mg/L) |
Nickel (mg/L) |
Chromium (mg/L) |
Zinc (mg/L) |
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| Inlet |
Outlet |
Inlet |
Outlet |
Inlet |
Outlet |
Inlet |
Outlet |
Inlet |
Outlet |
|
| Spring |
0.255 |
0.157 |
0.330 |
0.210 |
0.589 |
0.293 |
0.037 |
0.017 |
0.252 |
0.070 |
| Summer |
0.300 |
0.165 |
0.340 |
0.230 |
0.660 |
0.354 |
0.019 |
0.009 |
0.246 |
0.060 |
| Fall |
0.150 |
0.090 |
0.197 |
0.103 |
0.375 |
0.238 |
0.020 |
0.009 |
0.269 |
0.098 |
| Winter |
0.270 |
0.120 |
0.180 |
0.098 |
0.325 |
0.205 |
0.029 |
0.012 |
0.182 |
0.049 |
| Average |
0.244 ±0.065 |
0.133 ±0.035 |
0.262 ±0.085 |
0.160 ±0.070 |
0.487 ±0.162 |
0.273 ±0.065 |
0.026 ±0.008 |
0.012 ±0.004 |
0.237 ±0.068 |
0.069 ±0.021 |
| Removal percent (%) |
44.7 |
40.5 |
42.5 |
55.1 |
71.1 |
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