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Journal of National Oceanographic, Atmospheric and Marine Institute ©NOAMI Vol.26, No.2, 2009 ISSN: 10272119
LEVELS OF LEAD AND CADMIUM IN 17 SPECIES OF FRESH WATER FISH OF BANGLADESH
A.K.M.Sharif
Bangladesh Atomic Energy Commission, Dhaka, Bangladesh
M.Alamgir and Stanley A.Bajue Medgar Evers College, CUNY, NY, USA ABSTRACT _____________________________________________________________________________________________The lead and cadmium levels in seventeen commonly consumed fresh water fishes,Tenualosa ilisha, Pangasius pangasius, Labeo bata , Neopropius atherinoides, Otolithoides pama, Puntius sarana, Ompok pabda, Sicamugil cascasia, Clarias batrachus, Heteropneustes fossil, Labeo rohita, Gudusiachapra, Mystus vittatus, Awaous quamensis, Eutropichthys vacha , Notopterusnotopterus,andMastacembelus armatuswere determined by atomic absorption spectrometry (AAS). In this study, it is found that Sicamugil cascasia -1 1 (kachki) contains the highest level, 10.05 µg gand Mystus vittatus, the lowest level, 0.29 µg g-of Lead. The level of cadmium is seen to the highest one, 0.16 µg g-1 in Ompok pabda ,Pabda) and the lowest one, 0.03 -1 µg gin Mastacembelus armatus (Baim),. Analytical quality was determined by analysis of standard reference material MA-A-2™, Fish Flesh Homogenate, from IAEA (International Atomic Energy Agency). The results of the present study positively indicate these commonly consumed fresh water fishes have the concentrations of these trace metals well below the permissible levels suggested by WHO.
Key words: Lead, cadmium, fresh water fish, a biological material, atomic absorption spectrophotometry (AAS),Bangladesh. _____________________________________________________________________________________________
INTRODUCTION
In recent years much attention has been focused on concentrations of some toxic metals in freshwater fish and other aquatic organisms [15]. Proper interest has understandably been mainly directed towards commercial and edible species since high concentrations levels of some elements can be hazardous to health. It is also being suggested that some aquatic organisms may provide useful means of monitoring such elemental concentration levels in surface waters and their impact on the aquatic environment [6]. The main sources of lead in the aquatic environment are leaded gasoline, and contributions from mining areas, the latter being typical point sources with a low ionization coefficient.
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