الفهرس 
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Abstract
Water pollution with heavy metals is the most important problem influencing fish farming productivity during recent years. Cadmium (Cd), lead (Pb), and mercury (Hg) are the most dangerous HMs, because of their cumulative nature in several organs.
Mercury is a very toxic element that may enter aquatic systems through natural and anthropogenic sources. Fruits and their byproducts can eliminate HMs from polluted water. Among these fruit peel wastes are pomegranate peel. Some of useful bacterial cell are known as probiotic. It can be used as a biological, ecofriendly method for toxin medication and removal of heavy metals.
Water and C. gariepinus samples were collected from two private fish farms in Al Sharkia Governorate for analysis Pb, Hg, and Cd and evaluate the highest concentrations. Mercury showed the highest concentration (0.13 ppm). The adsorption capacity of PP was evaluated by testing different concentrations, 0.3, 0.6, 0.9, 1.2, and 1.5 g L–1, wherein 1.5 g L–1 revealed the highest Hg adsorption efficiency. The results indicated that Hg concentration was decreased with increased PP concentration until 72 h.