Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Bioaccumulation of Heavy Metals in Some Snail Fish and Soil from Polluted in Chaktai Khal of Karnafully River, Chittagong

Tania Sultana
Department of Zoology, University of Dhaka, Dhaka-1000, Bangladesh.

Mizanur Rahman
Department of Zoology, University of Dhaka, Dhaka-1000, Bangladesh.

Md. Ali
Chemistry Division, Atomic Energy Centre, Dhaka-1000, Bangladesh.

Abu Tweb Abu Ahmed
Department of Zoology, University of Dhaka, Dhaka-1000, Bangladesh.

Abstract/ Executive Summary:

Environmental pollution has become a major concern of developing countries in the last few decades. There is a growing sense of global urgency regarding the pollution of our environment by an array of chemicals used in various activities (Tariq et al. 2008). Chaktai Khal is located in 22°21'31"N 91°50'36"S which is one of the busiest commercial center of the country. Chaktai Khal was most suitable for handling of essential commodities. Benthic gastropod sand Crustaceans have an especially close relationship with the sediments that comprises their habitat and feeding site which in turn are used as food source by birds and fish and make them accessible for human consumption through food chain and eventually pose great health risk (Altndag and Yigit 2005). Heavy metals accumulated in soil can affect concentration of heavy metals in the organisms that dwells in that area (Kim and Kim 2006).

Keywords: Soil, Heavy metals, Fish, Snail fish, Polluted

Location: Chaktai Khal of Karnafully River, Chittagong

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Aquatic animal

Objectives:

To determine the concentrations of heavy metals Zn, Cu, Cd and lead in soil sediments, mud crab and snail’s species and Bivalve -Asiatic hard calm inhabiting at the Chaktai khal Zone and to find out suitable snail species as sentinel animal used for metal monitoring program in fresh water ecosystem.

Methodology:

Mollusks as Asiatic hard calm (Meretrix meretrix) and cherry snail (Neritina smithi) and crustacean as Mud crab (Scylla olivacea) and soil of this zone are used as sample for finding the bio-accumulating rate to analyze and compare the metallic component of that site and also relationship with the specimens. These are caught by netting device and collected from April to May in First time and in second time from October to November of the year. Upon collection, the samples were washed with tap water and rinsed thoroughly with distilled water and transported in plastic specimen vial with 4% formalin to the laboratory. Muscle tissues were removed from the animal and cut into small pieces and dried at constant temperature of 800 for 48 hour in the oven. Dried samples of individual tissues were grinded into fine powder by agate motor for biological tissue and aluminum carbide motor for sand and soil. Tablets were made from this powder by using 10 mm dia and hydraulic pressure. The pellets were 10 mm in diameter and about 1-mm thick containing 100 mg portions of the samples and they were prepared with a graduated hydraulic press by applying 3 tons of pressure. All standards and unknowns were prepared under identical conditions. The readymade pellets from each sample standard where then put into clean dry small plastic Petri dishes and preserved in a vacuum desiccators until analysis. Radioisotope Induced X Ray Fluorescence method was used to estimate heavy metal from the tablet. For the analysis of soil samples, a single multi-element standard, IAEA-Soil-7 was used for the calibration of concentration in this study. Every specimen has been analyzed for seven times. The Mean concentration of Heavy metals in selected crustacean and Mollusks, soil samples. The results were expressed in mg/kg dry weight of tissues and the average value have also compared with the standard value of FAO and their maximum and minimum for concentrations (MAC. BD) of heavy metals in the tissues of these samples are shown in the (Table 1) for the sites of CUFL. Sarma et al. 2007 observed bioaccumulation of heavy metals in some commercial fishes and crabs of the Gulf of Cambay where the rate of (Cu: 43, Zn: 55, Fe: 423 and Pb: 2.43 mg/kg) in mud crab and order of toxicity was Fe>Zn>Mn>Cu>Ni>Cd>Pb>Rb. In this study, Mud crab collected from Chaktai Khal was Fe: 333.6, Mn: 123.95, Zn: 100. 14, Cu: 58.12, Br: 33.50, Ni: 13.19, Cd: 6.06, Pb: 3.79 and Rb: 3.74 (mg/kg) and order of toxicity was Fe>Mn>Zn> Cu> Br>Ni>Cd>Pb>Rb which is near about similar with Sarma. In Mud crab, Sr and Fe are highly accumulated but As, Pb, Zn and Ni exceeded the standard level. The Cu level recorded in tissue of Mud crab samples showed elevated concentration than Mollusks. This level is presumably influenced by the Cu contained Haemocyanin in the Haemolymph of crustaceans.

Source of Information: Bangladesh J. Zool. 43(1): 145-151, 2015 ISSN: 0304-9027 (Print) 2408-8455 (Online)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Form the present study, it can be concluded that the heavy metal concentration in the different tissue of animals and Soil are higher than the prescribed level. Therefore the selected species and soil for this study are very risky for human consumption in this region. This study will convey a strong message for the government body, policy maker to establish rules and regulation in order to save our environment and will be helpful for public awareness.

Knowledge Management: Journal