Polycyclic Aromatic Hydrocarbons (PAHs) Contamination in Chrysichthys nigrodigitatus Lacépède, 1803 from Lake Togo-Lagoon of Aného, Togo: Possible Human Health Risk Suitable to Their Consumption

Kamilou Ouro-Sama (), Gnon Tanouayi, Hodabalo Dheoulaba Solitoke, Narcis Barsan (), Emilian Mosnegutu, Tchaa Esso-Essinam Badassan, Sadikou Agbere, Koudjo Adje, Valentin Nedeff and Kissao Gnandi
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Kamilou Ouro-Sama: Laboratoire de Gestion, Traitement et Valorisation des Déchets, Faculté des Sciences, Département de Géologie et Environnement, Université de Lomé, Lomé BP 1515, Togo
Gnon Tanouayi: Laboratoire de Gestion, Traitement et Valorisation des Déchets, Faculté des Sciences, Département de Géologie et Environnement, Université de Lomé, Lomé BP 1515, Togo
Hodabalo Dheoulaba Solitoke: Laboratoire de Gestion, Traitement et Valorisation des Déchets, Faculté des Sciences, Département de Géologie et Environnement, Université de Lomé, Lomé BP 1515, Togo
Narcis Barsan: Faculty of Engineering, “Vasile Alecsandri” University of Bacau, 157 Calea Marasesti, 600115 Bacau, Romania
Emilian Mosnegutu: Faculty of Engineering, “Vasile Alecsandri” University of Bacau, 157 Calea Marasesti, 600115 Bacau, Romania
Tchaa Esso-Essinam Badassan: Laboratoire de Gestion, Traitement et Valorisation des Déchets, Faculté des Sciences, Département de Géologie et Environnement, Université de Lomé, Lomé BP 1515, Togo
Sadikou Agbere: Laboratoire de Gestion, Traitement et Valorisation des Déchets, Faculté des Sciences, Département de Géologie et Environnement, Université de Lomé, Lomé BP 1515, Togo
Koudjo Adje: Laboratoire de Gestion, Traitement et Valorisation des Déchets, Faculté des Sciences, Département de Géologie et Environnement, Université de Lomé, Lomé BP 1515, Togo
Valentin Nedeff: Faculty of Engineering, “Vasile Alecsandri” University of Bacau, 157 Calea Marasesti, 600115 Bacau, Romania
Kissao Gnandi: Laboratoire de Gestion, Traitement et Valorisation des Déchets, Faculté des Sciences, Département de Géologie et Environnement, Université de Lomé, Lomé BP 1515, Togo

IJERPH, 2023, vol. 20, issue 3, 1-18

Abstract: The Lake Togo-Lagoon of Aného is located in the coastal zone where phosphorite mining is carried out. This mining discharges all kinds of waste such as fuel oil into the surrounding environment without prior treatment. Moreover, the hydrosystem receives runoff and river inputs after having crossed and leached from mining and urban soils. This study aims to determine the polycyclic aromatic hydrocarbons (PAHs) contamination in commercially consumed fish species ( Chrysichthys nigrodigitatus ) from that hydrosystem and the associated health risks for consumers. For that, fish sample collection was performed during the dry season. Afterwards, their muscles, gills, and livers were cut and 12 PAHs were analyzed using gas chromatography coupled with a mass spectrometer (GC-MS). The total PAHs (tPAHs) concentrations in fish tissues ranged from 5.24 to 48.40 µg/kg with average concentration of 14.51 ± 8.95 µg/kg in muscles, from 5.90 to 28.20 µg/kg averaging 14.90 ± 5.19 µg/kg in gills, and from 43.20 to 149.00 µg/kg with an average of 80.74 ± 27.08 µg/kg in livers. The average concentrations of low molecular weight PAHs (LMW PAHs) were 10.82 ± 9.61 µg/kg in muscles, 8.25 ± 5.43 µg/kg in gills, and 47.97 ± 22.56 µg/kg in livers whereas those of high molecular weight of PAHs (HMW PAHs) were 4.10 ± 2.14 µg/kg in muscles, 7.98 ± 3.96 µg/kg in gills, and 32.77 ± 8.66 µg/kg in livers. An overall trend of decreasing concentrations with increasing fish size classes was observed for some PAHs (Naphtalene, Pyrene in muscles, for Pyrene, Benzo(a)Anthracene, Chrysene in gills and for Naphtalene, Phenanthrene in livers). The PAHs in these fish might have pyrogenic and petrogenic sources, with the dominance of pyrogenic, and all of the total hazard quotients (THQ) are less than 1. This situation must not be neglected for better planning sustainable management of the target ecosystem.

Keywords: contamination; Chrysichthys nigrodigitatus; polycyclic aromatic hydrocarbons; health risk; Lake Togo (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2023
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