Table 3.
Heavy metal and metalloid pollution in river sediments (mg/kg).
| River | City/Sampling Site | Sampling Period/Number of Sampling Site | As | Pb | Cd | Cr | Reference |
|---|---|---|---|---|---|---|---|
| Buriganga | Dhaka (Hazaribagh to Meherbagh) | January 2014/7 | NA | 31.4 | 1.5 | 173.4 | [60] |
| Buriganga | Dhaka (Kholamura launch terminal to Postogola Bridge) | Summer 2009/20 | 14 | 475 | 4.7 | 511 | [60] |
| Buriganga | Dhaka | Winter 2009/20 | 16 | 478 | 5.9 | 709 | [72] |
| Buriganga | Dhaka (Watchpur Ghat to Badamtoli Ghat) | -/5 | NA | 79.8 ± 16.9 | 0.8 ± 0.55 | 101.2 ± 42.2 | [61] |
| Buriganga | Dhaka (Balughat, Shawaryghat and Foridabad) | -/3 | NA | 69.75 ± 4.13 | 3.33 ± 0.77 | 177.53 ± 30.19 | [63] |
| Turag | Tongi Bridge to Ashulia | -/15 | NA | 18.3 | 0.8 | 178 | [62] |
| Turag | Tongi Bridge, to Taltola Bridge | NA | NA | 32.78 ± 3.32 | 0.28 ± 0.33 | 43.02 ± 18.31 | [9] |
| Karnaphuli | Chittagong (Fishery Ghat, Sea port, Custom House, Marine Academy Bangladesh Jetty) | September 2014 (summer)/7 | 16.79 ± 4.70 | 38.33 ± 12.74 | 1.51 ± 0.64 | 70.06 ± 30.93 | [8] |
| Karnaphuli | Chittagong (Fishery Ghat, Sea port, Custom House, Marine Academy Bangladesh Jetty) | March 2015 (winter)/7 | 23.81 ± 6.39 | 49.04 ± 15.06 | 2.50 ± 0.85 | 92.11 ± 33.16 | [8] |
| Karnaphuli | Chittagong (Fishery Ghat, Chaktikhal, Mojjartek, Kalurghat) | February to April during 2013/5 | NA | 4.96 ± 0.60 | 0.24 ± 0.02 | 0.76 ± 0.12 | [13] |
| Karatoa | Bogra (Bogra district urbanized area) | February–September 2013 (winter)/8 | 27 ± 17 | 63 ± 16 | 1.5 ± 0.77 | 118 ± 50 | [68] |
| Karatoa | Bogra (Bogra district urbanized area) | February–September 2013 (summer)/8 | 22 ± 16 | 54 ± 15 | 1.0 ± 0.53 | 99 ± 38 | [68] |
| Karatoa | Bogra (Bogra City area) | March,2011/5 | NA | 69.81 ± 27.57 | 10.86 ± 0.92 | 8.37 ± 3.35 | [73] |
| Pasur | Mongla port in the Sundarbans mangroves | January to June 2013/3 | NA | 6.919 | NA | 19.369 | [69] |
| Pasur | Mongla | NA | 3.15–19.97 | 7.34–55.32 | 0.39–3.17 | 20.67–83.70 | [70] |
| Paira | Patuakhali | February–March and August–September 2012/8 | 19 ± 3.0 | 49 ± 11 | 1.2 ± 0.73 | 67 ± 27 | [74] |
| Standards | 4.8 | 17 | 0.09 | 92 | [75] | ||
| Standards | NA | 31 | 0.6 | 26 | [76] |
Notes: NA, not applicable/reported. For metal and metalloid concentrations, some values were reported with standard errors, and some were reported with the concentration range in brackets.