Islam, Md. Sirajul, Rahman, Md. Mazedur, Kabir, Md. Humayun, Hoq, Md. Enamul, Meghla, Nowara Tamanna, Suravi, Suravi, Al Mamun, Shamim, Sarker, Md. Eusuf. (1400). Seasonal Dynamics of Heavy Metal Concentrations in Water, Fish and Sediments from Haor Region of Bangladesh. , 7(4), 843-857. doi: 10.22059/poll.2021.323206.1076
Md. Sirajul Islam; Md. Mazedur Rahman; Md. Humayun Kabir; Md. Enamul Hoq; Nowara Tamanna Meghla; Suravi Suravi; Shamim Al Mamun; Md. Eusuf Sarker. "Seasonal Dynamics of Heavy Metal Concentrations in Water, Fish and Sediments from Haor Region of Bangladesh". , 7, 4, 1400, 843-857. doi: 10.22059/poll.2021.323206.1076
Islam, Md. Sirajul, Rahman, Md. Mazedur, Kabir, Md. Humayun, Hoq, Md. Enamul, Meghla, Nowara Tamanna, Suravi, Suravi, Al Mamun, Shamim, Sarker, Md. Eusuf. (1400). 'Seasonal Dynamics of Heavy Metal Concentrations in Water, Fish and Sediments from Haor Region of Bangladesh', , 7(4), pp. 843-857. doi: 10.22059/poll.2021.323206.1076
Islam, Md. Sirajul, Rahman, Md. Mazedur, Kabir, Md. Humayun, Hoq, Md. Enamul, Meghla, Nowara Tamanna, Suravi, Suravi, Al Mamun, Shamim, Sarker, Md. Eusuf. Seasonal Dynamics of Heavy Metal Concentrations in Water, Fish and Sediments from Haor Region of Bangladesh. , 1400; 7(4): 843-857. doi: 10.22059/poll.2021.323206.1076

Seasonal Dynamics of Heavy Metal Concentrations in Water, Fish and Sediments from Haor Region of Bangladesh

Pollution
دوره 7، شماره 4، زمستان 2021، صفحه 843-857    اصل مقاله (286.84 K)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.22059/poll.2021.323206.1076
نویسندگان
Md. Sirajul Islam1؛ Md. Mazedur Rahman1؛ Md. Humayun Kabir* 1؛ Md. Enamul Hoq2؛ Nowara Tamanna Meghla1؛ Suravi Suravi1؛ Shamim Al Mamun1؛ Md. Eusuf Sarker1
1Department of Environmental Science and Resource Management, Mawlana Bhashani Science and Technology University, Tangail-1902, Bangladesh
2Bangladesh Fisheries Research Institute, Freshwater Station, Mymensingh-2201, Bangladesh
چکیده
Heavy metal concentrations in water, fish, and sediments from Bangladesh's haor region were investigated. Fish and sediment samples were taken once a season and evaluated using standard methods, while water samples were collected monthly. Results showed that metals in water (mg/L) were found in order of Mn (0.1694) > Cu (0.0189) > Zn (0.0045) > Pb (0.0040) > Cd (0.0028) within the maximum permissible level of Environment Conservation Rules (ECR). Mean concentrations of metal in fish (mg/kg–dry wt.) found in order of Zn (56.16) > Cu (25.47) > Mn (4.36) > Pb (2.19) > Cd (1.27) that were higher than maximum allowable level of Food and Agricultural Organization (FAO) except Cu. Metal in sediments (mg/kg) found in order of Mn (127.61) > Zn (32.51) > Pb (10.09) > Cu (5.40) > Cd (0.43), and except Cu all metal concentrations were lower than the Environmental Protection Agency's (EPA) probable effect concentrations. In water and sediments, pollution indices revealed a critical pollution threshold for water, and a range of unpolluted to highly polluted for sediments. Sampling sites had low potential ecological risk, despite the fact that metals were showing signs of a negative impact on people' health. Furthermore, bio-concentration factor for fish and water was low to extremely high, but for fish and sediment was low. The level of heavy metal contamination in haor shows the situation is alarming for biota and residents of the region. The relevant authority should control and monitor the aquatic ecology in order to protect it.
کلیدواژه‌ها
aquatic environment؛ heavy metal؛ health risk؛ pollution indices؛ Bangladesh
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