Risks Assessments of Heavy Metals Bioaccumulation in Water and Tilapia nilotica Fish from Maguite Island of Fitri Lake
Djibrine Adoum Oumar, Guira Flibert, Abdelsalam Tidjani, Nodjimadji Rirabe, Madjimbaye Patcha, Tarnagda Bakary, Abdoullahi Hissein Ousman, Traoré Yves, Savadogo Aly
Current Journal of Applied Science and Technology · pp. 1–9 · Published 8 Mar 2018
10.9734/CJAST/2018/39384Abstract
The purpose of this study is to assess concentration of selected metals (Zn, Cu, Cr, Pb, Cd and Fe) in the muscle, flesh and bone of Tilapia nilotica fish and in the water of Fitri Lake. It was carried out in Maguite Island of Fitri Lake, Batha region in Chad. Samples were collected from April to December 2016. A hundred of fish samples and three (3) sites of water collection were concerned. The content in heavy metals is determined using a spectrophotometer. The averages of heavy metals (mg/L) in water are 0.04 (Fe), 0.01 (Zn), 3.01 (Cu), 5.78 (Cr), and 0.07 (Cd). All the fish tissues have an important level of heavy metals content. Muscles have the lower content. Heavy metals content (mg/kg) vary from 55.72 to 88.45 for Fe, 36.45 to 50.24 for Zn, 20.26 to 32.19 for Cu, 0.34 to 17.82 for Cr and 0.02 to 0.07 for Cd. All the analyzed parameters exceed the acceptable limit according to international standards. The high level of heavy metals content in fishes and water of the lake is an indicator of an important pollution activity around the lake or drained by the lake.
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