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MERCURY CONCENTRATIONS IN TWELVE COMMONLY CONSUMED FRESH WATER FISH OF BANGLADESH

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7 pages

Mercury concentrations in 12 commonly consumed fresh water have been determined by neutron activation analysis.

Publié par :
Ajouté le : 21 juillet 2011
Lecture(s) : 159
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Journal of National Oceanographic, Atmospheric and Marine Institute
©
NOAMI
Vol.25, No.1, 2008
ISSN: 1027-2119
MERCURY CONCENTRATIONS IN TWELVE
COMMONLY CONSUMED
FRESH WATER
FISH OF BANGLADESH
A.K.M.Sharif
Bangladesh Atomic Energy Commission, Dhaka-1000, Bangladesh
M.Alamgir, Stanley A.Bajue and Rashed Alam
Department of Physical, Environmental and Computer Sciences
Medgar Evers College, CUNY, NY, U.S.A.
Abstract
:
Mercury levels in edible portion of some commonly consumed fresh water fish (12 varieties),
namely,
Chitala chitala, Cirrhinus cirrhous, Ctenophryngodon idella, Colisa fasciata, Cyprinus carpio carpio,
Glossogobius giuris, Hypophthalmichthus michthys molitrix, Labeo boggut, Monopterus cuchia, Ailia coila, Labeo
calbasu
and
Channa punctala
were determined by radiochemical neutron activation analysis (RNAA). The
results were found to range from
(
0.250-0.438
) μg g
-1
on dry weight, where four species had mercury
concentration, ( 0.250 -0.293)
μg g
-1
, four, ( 0.335-0.393) μg g
-1
, two, ( 0.407-0.413)
μg g
-1
,and the rest
one,0.500 μg g
-1
based the average values of
12 species of
fish. The total average value of all fish
samples is 0.359±0.063 μg g
-1
.
The results were found to agree well with other published data on river and
marine fishes and within permissible levels accepted internationally
Key words
:
Mercury, Fish, Radiochemical neutron activation analysis, Bangladesh
INTRODUCTION
Bangladesh is a country through which a large number of big rivers, the Meghna, the Bhramaputra, the
Surma, the Karnaphuli and the Padma flow. A good number of small rivers also flow through this
country. Basically, it is a country of big and small rivers. Besides these rivers, there are lots of “Bills”,
“Howors”, “Khals”, ponds, water reservoirs, lakes, and submerged lands where water exists throughout
the year in this country.
Fish is collected from these big and small rivers. Fish is also available in the “Bills and Howors”,”Khals”,
lakes and ponds. Besides these sources, fish is produced and nourished in big water reservoirs, ponds,
lakes and submerged watery land.
Another most important source of fish is the Bay of Bengal.
Bangladesh has a large coastal belt.
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