Mercury concentrations in 14 commonly consumed fresh water fish of bangladesh
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Mercury concentrations in 14 commonly consumed fresh water fish of bangladesh

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Description

Mercury concentrations in 14 type of fish of Bangladesh have been determined by neutron activation analysis. The results obtained, are compared with those of the published papers

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Publié par
Nombre de lectures 489
Langue Français

Extrait

Journal of National Oceanographic, Atmospheric and Marine Institute
©
NOAMI
Vol.26, No1, 2009
ISSN: 1027-2119
MERCURY CONCENTRATIONS IN 14
COMMONLY CONSUMED
FRESH WATER FISH OF
BANGLADESH
A.K.M.Sharif
Bangladesh Atomic Energy Commission, Dhaka-1000, Bangladesh
M.Alamgir, and Stanley A.Bajue
Department of Physical, Environmental and Computer Sciences
Medgar Evers College, CUNY, NY, U.S.A.
Abstract
: Concentrations of mercury in edible portion of some commonly consumed fresh water fish (14
varieties) namely,
Amblypharyngodon mola, Orechromis niloticus niloticus, Orechromis mossambicus,
Channa guchua, Barbonymus gonionotus, Nangra nangra, Tor putitora, Megarasbora elanga
,
Chanda
mama, Clarias gariepinus, Colisa fasciata, Labeo gonius,
Silonia silonia
and
Chagunius chagunio
were
determined by radiochemical neutron activation analysis (RNAA). The results were found to range from
( 0.20-0.91) μg g
-1
on dry weight, where six species had mercury concentration, ( 0.20 -0.32)
μg g
-1
,
seven, ( 0.30-0.50 ) μg g
-1
and the rest one, ( 0.80-0.91)
μg g
-1
, based the average values of
14 species of
fish. The total average value of all fish samples is 0.377 μg g
-1
.
The results were found to agree well with
other published data on river and marine fishes and within permissible level 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, medium 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 different types 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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