Bioaccumulation of heavy metals in some commercially important fishes from a tropical river estuary suggests higher potential health risk in children than adults

Autoři: A. S. Shafiuddin Ahmed aff001;  Sharmin Sultana aff002;  Ahasan Habib aff001;  Hadayet Ullah aff004;  Najiah Musa aff003;  M. Belal Hossain aff001;  Md. Mahfujur Rahman aff005;  Md. Shafiqul Islam Sarker aff006
Působiště autorů: Department of Fisheries and Marine Science, Noakhali Science and Technology University, Noakhali, Bangladesh aff001;  Department of Chemistry, National University, Gazipur, Bangladesh aff002;  Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, Kuala Nerus, Terengganu, Malaysia aff003;  Southern Seas Ecology Laboratories, School of Biological Sciences, The University of Adelaide, Adelaide, South Australia, SA, Australia aff004;  Department of Statistics, Cumilla University, Cumilla, Bangladesh aff005;  Forensic Science Laboratory, Rapid Action Battalions Headquarters, Dhaka, Bangladesh aff006
Vyšlo v časopise: PLoS ONE 14(10)
Kategorie: Research Article
doi: 10.1371/journal.pone.0219336


The Karnaphuli River estuary, located in southeast coast of Bangladesh, is largely exposed to heavy metal contamination as it receives a huge amount of untreated industrial effluents from the Chottagram City. This study aimed to assess the concentrations of five heavy metals (As, Pb, Cd, Cr and Cu) and their bioaccumulation status in six commercially important fishes, and also to evaluate the potential human health risk for local consumers. The hierarchy of the measured concentration level (mg/kg) of the metals was as follows: Pb (13.88) > Cu (12.10) > As (4.89) > Cr (3.36) > Cd (0.39). The Fulton’s condition factor denoted that fishes were in better ‘condition’ and most of the species were in positive allometric growth. The bioaccumulation factors (BAFs) of the contaminants observed in the species were in the following orders: Cu (1971.42) > As (1042.93) > Pb (913.66) > Cr (864.99) > Cd (252.03), and among the specimens, demersal fish, Apocryptes bato appeared to be the most bioaccumulative organism. Estimated daily intake (EDI), target hazard quotient (THQ), hazard index (HI) and carcinogenic risk (CR) assessed for potential human health risk implications suggest that the values were within the acceptable threshold for both adults and children. However, calculated CR values indicated that both age groups were not far from the risk, and HI values demonstrated that children were nearly 6 times more susceptible to non-carcinogenic and carcinogenic health effects than adults.

Klíčová slova:

Adults – Ecosystems – Estuaries – Freshwater fish – Heavy metals – Pollution – Principal component analysis – Water pollution


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