Title - Variances in The Accumulation of Some Heavy Metals in Water, Sediments and Muscles of Clarias Gariepinus with Respect to Seasons in Qua Iboe River, Southeastern Nigeria

Author: Udofia Udeme Uyom1, Antai Ekpo Eyo2, Joseph Akaninyene Paul3*, Andem Andem Bassey4


Abstract :-

The findings revealed seasonal variations of heavy metals concentration in all samples. The mean heavy metals concentrations in muscle were; 3.694 ± 1.118 (Cu), 0.376 ± 0.208 (Cr), 12.017 ± 2.002 (Zn), 17.896 ± 2.484 (Fe), 7.867 ± 2.020 (Mn), 0.613 ± 0.356 (Cd), 14.408 ± 1.842 (Ni) mg/kg (Dry season); 2.108 ± 0.195 (Cu), 0.186 ± 0.117 (Cr), 10.270 ± 1.076 (Zn), 15.485 ± 2.376 (Fe), 7.580 ± 1.137 (Mn), 4.003 ± 0.152 (Cd), 11.624 ± 2.569 (Ni) mg/kg (Rainy season). Lead was not detected in the muscle of Clarias gariepinus during dry and rainy season throughout the study. The mean heavy metals concentration in water were; 0.503 ± 0.228 (Cu), 0.016 ± 0.006 (Cr), 0.363 ± 0.107 (Zn), 0.350 ± 0.244 (Fe), 1.111 ± 0.362 (Mn), 0.313 ± 0.238 (Cd), 0.200 ± 0.190 (Pb), 0.275 ± 0.135 (Ni) mg/l (Dry season); 0.280 ± 0.072 (Cu), 0.016 ± 0.006 (Cr), 0.213 ± 0.029 (Zn), 0.290 ± 0.209 (Fe), 1.058 ± 0.435 (Mn), 0.303 ± 0.067 (Cd), 0.163 ± 0.134 (Pb), 0.200 ± 0.092 (Ni) mg/l (Rainy season). The mean metal concentration in sediments were; 8.227 ± 1.574 (Cu), 0.585 ± 0.274 (Cr), 1.160 ± 1.697 (Zn), 142.683 ± 55.465 (Fe), 42.637 ± 10.694 (Mn), 0.820 ± 0.165 (Cd), 3.747 ± 2.301 (Pb), 20.967 ± 0.752 (Ni) mg/kg (Dry season); 4.823 ± 0.895 (Cu), 0.436 ± 0.106 (Cr), 7.153 ± 1.038 (Zn), 78.217 ± 20.004 (Fe), 31.990 ± 4.982 (Mn), 0.457 ± 0.090 (Cd), 2.993 ± 1.662 (Pb), 18.953 ± 1.705 (Ni) mg/kg (Rainy season). The muscles during both seasons were slightly polluted with Cr, Fe, Mn and Ni, while the muscle was slightly polluted with Cu during dry season and polluted with Cd during rainy season. Water was slightly polluted with Mn, Cd, Pb and Ni during both seasons and also polluted with Fe during dry season. The sediments were slightly polluted with Cr and Ni during both seasons and were also slightly polluted with Cd during dry season. The study revealed that heavy metals concentration was higher during the dry season in muscle of Clarias gariepinus (except Cadmium), water (Chromium) and sediments.

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