Detection of Cadmium and lead metals contamination in the water and Liza Abu fish of Al- Delmj marsh

Samples were taken from the center of the AL-Dalamj Marsh using 10 various locations and techniques. Three components from the sample were tested: liver, gills and muscles). Together with the fishers, the combustion of fossil fuels and gasoline, refuse incinerators, mining, and volcanic eruption and weathering of metal-bearing rocks, among other things. These heavy metals' mobilization into the aquatic ecosystem changes the physicochemical characteristics of water, making it dangerous for aquatic life, Heavy metals primarily enter fish bodies through the gills, body surface, and digestive system when they consume food that has accumulated metals. According to the results of the current research, the concentration of cadmium (Cd) in the organs of Liza Abu fish was considerably higher than its seasonal mean, reaching (0.226 µg/gm) and second (0.33 µg/gm), respectively, while the fish's seasonal mean declined in the first season. Regarding the lead element (Pb), the research revealed that Liza Abu fish's organs had mean concentrations of Pb that were significantly higher than their mean concentrations during the first season (12.936 µg/gm), while their mean concentrations decreased during the second season (6.43 µg/gm). According to the findings of the analysis of the water samples, the highest mean Pb concentrations were found during the second season of the study (0.061 µg/gm), and the highest mean Cd concentrations were found during the first season of the study (0.016 µg/gm).The research found that the Dalmaj Marsh's fish were contaminated with heavy metals of all kinds and that their levels were higher than those recommended by public health organizations. According to the World Health Organization in 2003 (WHO), the percentage of cadmium in the water is (0.003µg/gm) and in fish is (0.5 µg/gm), whereas the percentage of lead in the water is (0.001 µg/gm) and in fish is (2.0 µg/gm), which calls for significant attention to the aquatic environment and support for that significant productive sector.