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  1. Home
  3. Heavy Metal Accumulation In Fish, Sediment And Water From Three Riverine Ecosystems In The South-western Bangladesh And Nexus To Human Health.
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  3. Heavy Metal Accumulation In Fish, Sediment And Water From Three Riverine Ecosystems In The South-western Bangladesh And Nexus To Human Health.

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Heavy Metal Accumulation in Fish, Sediment and Water from Three Riverine Ecosystems in the South-western Bangladesh

Sadman Sakib1, Goutam Kumar Kundu2, Md Samrat Mohay Menul Islam3

  • 1Fish Population Dynamics, Ecology and Climate Change Laboratory, Department of Fisheries, University of Dhaka, Dhaka, 1000, Bangladesh.

Biological Trace Element Research
|July 24, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Heavy metal contamination in Bangladesh rivers exceeded WHO thresholds, posing potential human health risks. Winter season showed higher fish contamination, with benthic and carnivorous species accumulating more metals.

Keywords:
Ecological riskHealth riskPollutionRiverine ecosystemSeasonal variationTrace metals

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Area of Science:

  • Environmental Chemistry
  • Ecotoxicology
  • Public Health

Background:

  • Urban rivers in Bangladesh face pollution from industrial and anthropogenic sources.
  • Assessing heavy metal accumulation in aquatic ecosystems is crucial for ecological and human health.
  • Understanding metal contamination patterns in interconnected river systems provides vital environmental data.

Purpose of the Study:

  • To investigate heavy metal accumulation in fish, water, and sediment of three major rivers in Bangladesh.
  • To assess the ecological and human health risks associated with heavy metal contamination.
  • To identify specific metals and river sections with the highest contamination levels.

Main Methods:

  • Sampling of water, sediment, and fish from 10 stations across three rivers (Rupsha, Atai, Bhairab) over two seasons (summer, winter).
  • Quantification of 11 heavy metals (As, Se, Pb, Be, Cd, Co, Cr, Cu, Mn, Ni, V) using Inductively Coupled Plasma Mass Spectrometry (ICP-MS).
  • Calculation of Ecological Risk Indices, Target Hazard Quotient (THQ), and Carcinogenic Risk (CR) to evaluate environmental and health impacts.

    • Main Results:

    • Water metal concentrations exceeded WHO higher thresholds in all three rivers.
    • Rupsha River showed highest Arsenic (As), Copper (Cu), and Vanadium (V); Bhairab River had elevated As, Manganese (Mn), and Chromium (Cr).
    • Fish contamination was higher in winter than summer, with benthic and carnivorous species accumulating more metals.

    Conclusions:

    • Despite low ecological risk indices, elevated metal levels in water and fish indicate potential risks to human health.
    • Interconnected river systems exhibit distinct metal contamination patterns influenced by proximity to industrial areas.
    • Seasonal variations and fish feeding habits significantly impact heavy metal bioaccumulation.