Author/Authors :
Aktaruzzaman، M نويسنده Department of Environmental Sciences, Jahangirnagar University, Dhaka-1342, Bangladesh , , Chowdhury ، m.a.z نويسنده Agrochemical and Environmental Research Division, Institute of Food and Radiation Biology, Atomic Energy Research Establishment, Savar, Dhaka-1349, Bangladesh , , Fardous، z نويسنده Agrochemical and Environmental Research Division, Institute of Food and Radiation Biology, Atomic Energy Research Establishment, Savar, Dhaka-1349, Bangladesh , , Alam، m.k نويسنده Agrochemical and Environmental Research Division, Institute of Food and Radiation Biology, Atomic Energy Research Establishment, Savar, Dhaka-1349, Bangladesh , , Hossain، m.s نويسنده Department of Environmental Sciences, Jahangirnagar University, Dhaka-1342, Bangladesh , , Fakhruddin، a.n.m نويسنده Department of Environmental Sciences, Jahangirnagar University, Dhaka-1342, Bangladesh ,
Abstract :
Pollution of water and soils by heavy metals is an emerging problem in industrialized countries.
The present study was conducted to investigate the heavy metals concentration in water and sediment
samples from ship breaking sites of Sitakunda to assess the potential ecological risk posed by heavy metal
using different methods. Heavy metals concentration was analyzed by Atomic Absorption Spectroscopy.
Concentrations of all the tested heavy metals except Cr in water samples of ship breaking site, Sitakunda were
lower than recommended values. The mean concentration of Cr was found 0.511± 0.284 mg/l. Concentrations
of all the tested heavy metals except Mn in sediment samples were higher than standard limit. The concentrations
of Pb, Mn, Cr, Cu and Zn in the sediment were 55.93±18.70, 20.08±4.03, 106.8±47.65, 50.09±18.31, and
70.71±19.45 mg/kg, respectively. Based on Geoaccumulation Index, Contamination factor, Sediment Quality
Guidelines, the sediment of ship breaking site can be treated as unpolluted to moderately polluted with Pb,
Zn, Cr and Cu but unpolluted with Mn. The Enrichment factors of Pb, Mn, Cr, Cu and Zn in the sediment
were: 2.97±0.98, 0.035±0.008, 1.97±0.88, 1.99±0.73, and 1.17±0.32, respectively. The Enrichment factor
( > 1) in all sampling sites, suggesting source of those metals (Pb, Cr, Cu and Zn) were more likely to be
anthropogenic. Based on the Potential Ecological Risk Index the ship breaking site posed to low risk to the
environment. The results of present study clearly indicated that the ship breaking site was moderately
polluted with heavy metals and pose low risk to the ecosystem.
