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Concentrations of selected metals in tannery sewage from Hazaribagh in comparison to the concentration limits (according to NEQS 2000) considered for directing sewage to inland waterways [Kabir et al_ 2017, modified]_
| Concentration [mg/L] Chromium [Cr] | Ferrum [Fe] | Lead [Pb] | |
|---|---|---|---|
| Sample 1 | 5,866.942 ± 1.02 | 1.37 ± 5.44 | 28.976 ± 6.68 |
| Sample 2 | 6,769.554 ± 1.59 | 108.556 ± 2.97 | 32.026 ± 6.92 |
| Sample 3 | 288.454 ± 1.87 | 98.292 ± 1.42 | 20.842 ± 4.88 |
| Sample 4 | 1,474.020 ± 4.99 | 14.26 ± 1.41 | 23.384 ± 2.53 |
| Sample 5 | 2,857.182 ± 3.23 | 41.952 ± 7.56 | 21.858 ± 2.33 |
| Sample 6 | 144.604 ± 2.21 | 64.392 ± 4.00 | 20.334 ± 2.50 |
| Sample 7 | 50.792 ± 1.22 | 23.57 ± 6.22 | 18.808 ± 4.09 |
| Sample 8 | 14.282 ± 1.17 | 30.732 ± 5.47 | 24.400 ± 1.21 |
| Sample 9 | 26.984 ± 6.57 | 19.512 ± 4.83 | 22.368 ± 5.68 |
| Standard acceptable limits for directing to inland waterways according to NEQS 2000 [www.elaw.org] NEQS 2000 [www.elaw.org] | 1.00 | 8.00 | 0.50 |
Average weight (kg) of marine waste (based on the size range) caught within 24 hours (22 November 2004) from three rivers in the southern California [Moore et al_ 2011]_
| Coyote Creek | San Gabriel River | Los Angeles River | Total | |||
|---|---|---|---|---|---|---|
| 1.0-4.75 mm | >4.75 mm | 1.0-4.75 mm | >4.75 mm | 1.0-4.75 mm | >4.75 mm | |
| 4.06 | 257.59 | 106.86 | 18,429.41 | 3,851.81 | 1,175.42 | 23,825.15 |