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Métaux lourds dans l'eau, les sédiments et les espèces de poissons du réservoir de Yonki
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ISBN10: 6207634292
ISBN13: 9786207634293
Publisher: Editions Notre Savoir
Published: Jun 10 2024
Pages: 116
Weight: 0.40
Height: 0.28 Width: 6.00 Depth: 9.00
Language: French
ISBN13: 9786207634293
Publisher: Editions Notre Savoir
Published: Jun 10 2024
Pages: 116
Weight: 0.40
Height: 0.28 Width: 6.00 Depth: 9.00
Language: French
Le réservoir de Yonki est situé dans le district de Kainantu en Papouasie-Nouvelle-Guinée. Les espèces de poissons du réservoir sont aujourd'hui menacées par des activités anthropogéniques telles que l'exploitation minière alluviale de l'or à petite échelle et les pratiques d'évacuation des eaux usées dans les bassins versants. Les poissons contaminés par des métaux lourds constituent une menace pour les organismes aquatiques et les humains, qui dépendent des poissons pour se nourrir. Cette étude visait à évaluer les niveaux de chrome (Cr), d'arsenic (As), de cadmium (Cd), de plomb (Pb), de mercure (Hg), de cuivre (Cu), de zinc (Zn) et de nickel (Ni) dans les eaux de surface et les sédiments de la zone du réservoir de Yonki et des cours d'eau supérieurs pendant les saisons humides et sèches. Les métaux lourds ont également été évalués dans les tissus d'espèces de poissons sélectionnées dans le réservoir de Yonki. Les résultats ont révélé que les paramètres physiochimiques et les métaux lourds dans l'eau de surface étaient dans les limites de l'OMS (2011) pour la survie des organismes aquatiques. Cr, Cd, Cu, Ni, et Pb ont dépassé les niveaux de la ligne directrice sur la qualité des sédiments pendant la saison sèche par rapport à la saison humide. Les valeurs de l'indice de géo-accumulation ont montré que le Pb dans les sédiments était fortement contaminé, en particulier pendant la saison sèche. Enfin, un plan de gestion des déchets a été recommandé.
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