TY - JOUR ID - 84110 TI - Seasonal Dynamics of Heavy Metal Concentrations in Water, Fish and Sediments from Haor Region of Bangladesh JO - Pollution JA - POLL LA - en SN - 2383-451X AU - Islam, Md. Sirajul AU - Rahman, Md. Mazedur AU - Kabir, Md. Humayun AU - Hoq, Md. Enamul AU - Meghla, Nowara Tamanna AU - Suravi, Suravi AU - Al Mamun, Shamim AU - Sarker, Md. Eusuf AD - Department of Environmental Science and Resource Management, Mawlana Bhashani Science and Technology University, Tangail-1902, Bangladesh AD - Bangladesh Fisheries Research Institute, Freshwater Station, Mymensingh-2201, Bangladesh Y1 - 2021 PY - 2021 VL - 7 IS - 4 SP - 843 EP - 857 KW - aquatic environment KW - Heavy metal KW - Health risk KW - pollution indices KW - Bangladesh DO - 10.22059/poll.2021.323206.1076 N2 - 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. UR - https://jpoll.ut.ac.ir/article_84110.html L1 - https://jpoll.ut.ac.ir/article_84110_712e1d3d3b31b03ed81fb88f6f54a28f.pdf ER -