IMPACT OF WASTEWATER DISCHARGES ON SOME TOXIC METAL CONCENTRATIONS IN THE WATER AND SEDIMENTS OF THE AIN DALLIA DAM, SOUK AHRAS, ALGERIAO. BELKADI, A. GHEID AND A. MIZIAbstract The current study aims to assess the impact of wastewater discharges from the Hanancha region on the physico-chemical quality of the Ain Dallia damâs waters and sediments. Water and sediment samples were collected and analyzed for this purpose between December 2015 and April 2016. TME pollution (Cu, Zn, Fe, and Pb) is assessed using relatively simple principles of measuring concentrations, calculating indices, and comparing them to established standards that vary depending on the element, its toxicity, and the receiving environment. The results show extremely high levels of Cu, Fe, and Pb contamination in the waters of the two dam sites. They clearly show the influence of anthropogenic inputs through the use of domestic wastewater discharges. However, an examination of the results of the three indices of the sediments, namely contamination factor (CF), degree of contamination (DC), and pollution load index (PLI), reveals very high poly metallic contamination. This pollution is caused mainly by zinc and copper. |