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Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
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Overview
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  1. Home
  3. Research Domains
  5. Indigenous Studies
  7. Pacific Peoples Environmental Knowledges
  9. Pacific Peoples Fisheries And Customary Fisheries
  11. Health Risk Assessment Of Pahs And Heavy Metal Levels In Periwinkles (pachymelania Fusca Mutans) And Crabs (scylla Serrata) Consumed In Crude Oil-contaminated Coastal Regions Of Southern Nigeria.

Health risk assessment of PAHs and heavy metal levels in periwinkles (Pachymelania fusca mutans) and crabs (Scylla serrata) consumed in crude oil-contaminated coastal regions of Southern Nigeria.

Gabriel Erhiga Odesa1, Donald Uzowulu Olannye2

  • 1Department of Geology, Dennis Osadabey University, Asaba, Delta State, Nigeria.

Toxicology Reports
|January 13, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Crude oil pollution in Nigerian coastal areas poses health risks from consuming crabs and periwinkles. Seafood contamination by Polycyclic Aromatic Hydrocarbons (PAHs) and heavy metals (HMs) exceeds limits, necessitating pollution control and seafood monitoring.

Area of Science:

  • Environmental Chemistry
  • Public Health
  • Marine Biology

Background:

  • Southern Nigerian coastal areas face crude oil pollution.
  • Seafood, including crabs and periwinkles, accumulates contaminants.
  • Assessing health risks associated with seafood consumption is crucial.

Purpose of the Study:

  • To evaluate health risks from consuming crabs and periwinkles from oil-polluted Southern Nigerian coastal areas.
  • To determine Polycyclic Aromatic Hydrocarbon (PAH) and Heavy Metal (HM) levels in these seafood.
  • To assess human health risks using established toxicological indices.

Main Methods:

  • Collected 20 samples of periwinkles and crabs from polluted sites.
  • Analyzed PAH and HM concentrations using US-EPA standards.
Keywords:
Carcinogenic toxic equivalentDietary daily intakeExcess cancer riskHeavy metals

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  • Conducted health risk assessments including Dietary Daily Intake (DDI), PAH4 index, Carcinogenic Toxic Equivalent (TEQs), Excess Cancer Risk (ECR), Hazard Quotient (HQ), and Cancer Risk Assessment (CRA).

    • Main Results:

    • PAH concentrations were 0.76 mg/kg in periwinkles and 0.49 mg/kg in crabs.
    • PAH4 index exceeded European Union limits; TEQ values indicated periwinkles below and crabs above the screening value.
    • Heavy metals were within EPA limits, except for cadmium (Cd); Hazard Quotient suggested potential risks from crab consumption.

    Conclusions:

    • Continued crude oil pollution in coastal areas will lead to severe health implications.
    • Pollution mitigation and regular seafood safety monitoring are essential for public health protection.
    • While Excess Cancer Risk was acceptable, potential risks from cadmium and PAHs warrant attention.
    Polycyclic aromatic hydrocarbons (PAH)