Health risk assessments based on polycyclic aromatic hydrocarbons in freshwater fish cultured using food waste-based diets

Yu Bon MAN, Wing Yin MO, Feng ZHANG, Ming Hung WONG

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Abstract

Two farmed freshwater fish species Nile tilapia (Oreochromis niloticus) and jade perch (Scortum barcoo) were cultured with food waste-based diets and compared with commercial formulated control diet for a period of six months. Sixteen priority polycyclic aromatic hydrocarbons (PAHs) in the diets and cultured fish meat were tested by gas chromatography–mass spectrometry. No significant differences of ∑PAHs were observed between Nile tilapia and jade perch fed with food waste-based diets and control diet (p > 0.05). However, there were significantly higher concentration of ∑PAHs in market fish compared with the same species of fish fed by food waste-based diets (p < 0.05). Thus, the food waste-based diets have a potential to lower the PAH concentrations in farmed fish when compared with market fish. Based on the PAH concentrations, a human health risk assessment was made. The results indicated there were no non-cancer and very low cancer risks of consuming fish cultured with food waste-based diets at the 95th centile (Nile tilapia: hazard index (HI adult) = 0.343 × 10⁻³, HI children = 0.614 × 10⁻³ and cancer risk value = 0.943 × 10⁻⁶; jade perch: HI adult = 0.456 × 10⁻³, HI children = 0.814 × 10⁻³ and cancer risk value = 0.291 × 10⁻⁶). In general, the fish fed with food waste-based diets were unlikely to cause adverse health effects, based on the concentrations of PAHs. There is great potential for using food waste-based diets as an alternative to commercial feeds for cultivating freshwater fish. Copyright © 2019 Elsevier Ltd. All rights reserved.
Original languageEnglish
Article number113380
JournalEnvironmental Pollution
Volume256
Early online dateOct 2019
DOIs
Publication statusPublished - Jan 2020

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Health risks
Polycyclic Aromatic Hydrocarbons
Polycyclic aromatic hydrocarbons
Nutrition
Fresh Water
Risk assessment
Fish
Fishes
Diet
Food
Health
Cichlids
Perches
Neoplasms
Meats
Meat
Spectrometry
Spectrum Analysis
Hazards
Gases

Citation

Man, Y. B., Mo, W. Y., Zhang, F., & Wong, M. H. (2020). Health risk assessments based on polycyclic aromatic hydrocarbons in freshwater fish cultured using food waste-based diets. Environmental Pollution, 256. Retrieved from https://doi.org/10.1016/j.envpol.2019.113380

Keywords

  • Cancer risk
  • Non-cancer risk
  • Food safety
  • Jade perch
  • Nile tilapia