Accumulation and health implications of arsenic, mercury, and selenium in selected freshwater fish species in the uMgeni River, South Africa

Ashish Misra, Ajay Bissessur, Mapurunyane Callies Selala, Jeffrey Lebepe*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Metal pollution threatens freshwater ecosystems and consequently the well-being of human communities consuming fish. The study evaluated the concentration of arsenic (As), mercury (Hg) and selenium (Se) in six fish species in the uMgeni River, and the edibility thereof. Water, sediment and fish were sampled during low and high flow seasons in the Inanda and Nagle dams. Metals were below detection level in the water column whereas notable concentrations were observed in sediment. Arsenic and Se concentrations were within the guidelines for all species, whereas Hg exhibited concentrations exceeding the guidelines except for Clarias gariepinus, Micropterus salmoides, and Cyprinus carpio. For non-carcinogenic risks, the THQs > 1 was observed for As and Hg for all species except C. carpio whereas Se showed THQs < 1 for all species. These findings suggest that consuming fish from the uMgeni River could result in As and Hg related non-carcinogenic health hazards.

Original languageEnglish
Article number2296973
JournalEnvironmental Pollutants and Bioavailability
Volume36
Issue number1
DOIs
Publication statusPublished - 2024
Externally publishedYes

Keywords

  • Inanda Dam
  • Metal pollution
  • Nagle Dam
  • Oreochromis mossambicus
  • bioaccumulation
  • fish muscle

Fingerprint

Dive into the research topics of 'Accumulation and health implications of arsenic, mercury, and selenium in selected freshwater fish species in the uMgeni River, South Africa'. Together they form a unique fingerprint.

Cite this