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Assessment of Trace Elements in the Demersal Fishes of a Coastal River in Bangladesh: a Public Health Concern

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Abstract

Trace elements contamination in the aquatic ecosystem is a current and major environmental concern due to their non-degradable nature and toxic effects on human health. Concentrations of arsenic (As), chromium (Cr), cadmium (Cd) and lead (Pb) in fish were estimated to evaluate contamination levels and health risks for Bangladeshi adults. A total of six demersal fish species namely Mystus vittatus, Polynemus paradiseus, Sillaginopsis panijus, Lates calcarifer, Cynoglossus arel and Pseudapocryptes elongates were collected in summer and winter season from the coastal Karnaphuli River, Bangladesh. The analyzed trace elements varied between different species of fish. The concentration of studied trace elements exceed Food and Agriculture Organization/World Health Organization maximum tolerable intake indicating risk to human body. The mean concentration of As, Cr, Cd and Pb were found 2.18, 9.1, 7.2 and 4.38 times higher than the recommended value. Health risks associated with these trace element intakes were evaluated in terms of dietary intake and target hazard quotients (THQs). The THQs value for individual fish species was more than one which was responsible for non-carcinogenic health hazard due to fish consumption. Target Carcinogenic Risk (TR) value for arsenic and lead was also higher than USEPA standard (10−4) indicated chronic cancer risk to human. From the health point of view, this study showed that the inhabitants who consume these fishes are exposed chronically to trace elements pollution with carcinogenic and non-carcinogenic consequences.

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Acknowledgements

The authors would like to thank the authority and staff members of the Fish Inspection and Quality Control (FIQC) Laboratory, Khulna, Bangladesh for providing laboratory facilities and co-operation during the sample analysis. The authors are grateful for financial support by the National Science and Technology MS Fellowship (NST-2014-15) from the Ministry of Science and Technology, The Government People’s Republic of Bangladesh.

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Authors and Affiliations

  1. Department of Aquaculture, Sher-e-Bangla Agricultural University, Dhaka, 1207, Bangladesh

    Mir Mohammad Ali

  2. Department of Aquaculture, Patuakhali Science and Technology University, Patuakhali, 8602, Bangladesh

    Mir Mohammad Ali & M. Lokman Ali

  3. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China

    Ram Proshad

  4. Department of Soil Science, Patuakhali Science and Technology University, Patuakhali, 8602, Bangladesh

    Saiful Islam

  5. Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan

    Saiful Islam

  6. Department of Fisheries, Fish Inspection and Quality Control Chemistry Lab, Dhaka, Bangladesh

    Zillur Rahman

  7. Department of Emergency Management, Patuakhali Science and Technology University, Patuakhali, 8602, Bangladesh

    Tapos Kormoker

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Correspondence to Saiful Islam.

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The authors declare that there are no conflicts of interest. This study mainly focuses on the toxic metal’s concentration in some demersal fishes including the human health risk assessment in the coastal Karnaphuli river of Bangladesh.

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Ali, M.M., Ali, M.L., Proshad, R. et al. Assessment of Trace Elements in the Demersal Fishes of a Coastal River in Bangladesh: a Public Health Concern. Thalassas 36, 641–655 (2020). https://doi.org/10.1007/s41208-020-00227-7

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