Seasonal Accumulations of Some Heavy Metal in Water, Sediment and Tissues of Black-Chinned Tilapia Sarotherodon melanotheron from Biétri Bay in Ebrié Lagoon, Ivory Coast

• Published in: Bulletin of environmental contamination and toxicology 2012-04, Vol.88 (4), p.571-576
• Main Authors: Coulibaly, Safiatou, Atse, Boua Célestin, Koffi, Kouamé Mathias, Sylla, Soumaïla, Konan, Kouadio Justin, Kouassi, N’Guessan Joël
• Format: Article
• Language: English
• Subjects: Animals; Aquatic Pollution; Bays - chemistry; bioaccumulation; Cadmium; Contaminated sediments; Copper; Cote d'Ivoire; deuterium oxide; Dry season; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental Monitoring; Estuaries; Geologic Sediments - chemistry; Heavy metals; Kidneys; Lagoons; Lead; Mercury; Metal concentrations; Metals, Heavy - analysis; Metals, Heavy - metabolism; Pollution; Rainy season; Sarotherodon melanotheron; seasonal variation; Seasonal variations; Seasons; Sediments; Soil Science & Conservation; Tilapia; tilapia (common name); Tilapia - metabolism; Tissues; Toxicology; Waste Water Technology; Water Management; Water Pollutants, Chemical - analysis; Water Pollutants, Chemical - metabolism; Water pollution; Water Pollution Control; wet season; Zinc
• ISSN: 0007-4861; 1432-0800
• DOI: 10.1007/s00128-012-0522-1

The seasonal accumulation of cadmium, copper, lead, mercury and zinc was determined in sediments, water, and black-chinned tilapia (Sarotherodon melanotheron; muscle, brain, kidney and liver tissues) collected monthly from Biétri Bay. The mean water concentration of metals (in mg L−1) ranged from 0.01 to 0.30 (mercury), 0.02–0.26 (cadmium), 2.40–4.80 (lead), 9.05–9.68 (copper), and 12.05–19.87 (zinc). The seasonal variations showed a significant difference in the levels of mercury, cadmium and lead among season. The highest mercury (0.30 ± 0.02 μg L−1), cadmium (0.26 ± 0.02 mg L−1) and lead (4.80 ± 1.03 mg L−1) levels were observed during dry season, while the lowest levels (0.21 ± 0.01, 0.02 ± 0.01 and 2.40 ± 0.02 mg L−1, respectively mercury, cadmium and lead) were measured during rainy season. The average cadmium (0.58 ± 0.36 mg L−1), copper (42.15 ± 19.40 mg L−1), lead (58.47 ± 38.10 mg kg−1), mercury (0.79 ± 0.47 μg kg−1) and zinc (187.58 ± 76.99 mg kg−1) concentrations determined in Biétri Bay sediments showed a similar trend as in water. The seasonal variations of mercury, cadmium and lead in tissues revealed that these metals were higher concentrated during dry and swelling seasons. The levels of zinc and copper followed by lead were higher in the tissues. The order of tissues metals concentrations was: kidney > liver > brain > muscle.