Science Target Conference Systems, Ajman 4th International Environment Conference 2016

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Heavy Metal Contamination in Water and Fishes from the Shitalakhya River of Bangladesh
Md Sirajul Islam, Md Humayun Kabir, Tanmoy Roy Tusher, Md Enamul Hoq

Last modified: 2015-12-14

Abstract


The study was conducted to investigate the heavy metal contaminations in water and fishes from upstream and downstream of the Shitalakhya river during March to May 2015. The water and fish samples (Notopterus notopterus upstream, Channa punctatus and Heteropneustes fossilis downstream) were collected from four sampling stations, as St-1 and St-2 (upstream), St-3 and St-4 (downstream) of the river. The heavy metals as Cd, Cu and Pb in water were determined with Atomic Absorption Spectrophotometer (AAS) in Bangladesh Institute of Nuclear Agriculture, while Cr, Cu, Pb and Zn in fishes were analyzed by using UNICAM-929 AAS in the SGS Bangladesh Limited, Dhaka. The concentrations of Cd, Cu, and Pb was found 0.00002-0.00006, 0.016-0.022 and 0.004-0.009 ppm in upstream, respectively, whereas 0.005-0.009, 0.020-0.027 and 0.021-0.025 ppm was found in downstream water, respectively, which indicated that the concentrations were much lower than permissible level. In case of fishes, higher concentration of Zn (15.82-35.59 ppm) was found in upstream, whereas lower concentrations of Zn (6.24-20.13 ppm) and Cu (0.22-0.76 ppm) were found in downstream though the concentrations of Cr and Pb were below the lower detection limit. The concentrations of Zn and Cu in fishes were higher than the permissible limit, indicated that the fishes of Shitalakhya river were highly contaminated with Zn and Cu which may unimpeachably cause severe health problems upon dietary intake. In order to maintain the water quality of the Shitalakhya river, proper monitoring through prior initiative need to be taken by the government of Bangladesh.