Chemical and natural substances used for Cu and Pb removal from water and their influence on both elements residues in fish organs [electronic resource].

Includes reference.

O. niloticus fingerlings (37.5 ± 2.5 g) raised in either Cu-polluted water (2mg/l) or Pb-polluted water (12mg/l) for 60 days. Polluted water treated with some materials to investigate its efficiency toward metals removal. Ethylene diamine tetra acetic acid (EDETA), (as chemical chelators) and rice husk and orange peel (as natural substances) were tested for their adsorption efficiency to reduce copper (as an essential metal) and lead (as a non-essential metal), concentrations in water to improve the aqueous environment of fish farms, and consequently fish meat quality. From the other hand, utilizing the huge quantities of these by-products, produced annually, in a useful and economic manner. Water Cu levels in 2 mg/l Cu-polluted water reduced by 100 %, 96.5 % and 95 %, while water Pb levels in 12 mg Pb/l polluted water reduced by 99.83 %, 91.33 % and 83.08 % as a result of applying 0.007, 0.5 and 0.5 g/l of EDTA, rice husk and orange peel respectively. The reduction of booth Cu and Pb in water resulted in a consequent reduction of these metals in muscles, gills livers and kidneys of the fingerlings. Conclusively; The application of 0.007, 0.5 and 0.5 g/l of EDTA, rice husk and orange peel respectively significantly reduced both Cu and Pb levels in 5 mg/l and 12 mg/l polluted water respectively, and consequently lowered there values in muscles, gills, livers and kidneys of O. niloticus fingerlings raised in these polluted waters.

Summary in Arabic.

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