MERCURY CONCENTRATIONS IN TWELVE COMMONLY CONSUMED FRESH WATER FISH OF BANGLADESH

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Description

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

Informations

• Publié par: malamgir46
• Nombre de lectures: 160
• Langue: Français

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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.