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The presence of heavy metals in treated wastewater has considered a serious environmental problem in many countries such as Algeria, where the wastewater irrigation has become a widespread practice. In this study, we were interested in toxic metals such as copper (Cu), chromium (Cr), lead (Pb) and cadmium (Cd) in wastewater, and treated wastewater and the possible risk or danger they can cause to human health and animals in the region of Batna and Timgad. Wastewater samples for Cu, Cr, Pb and Cd concentrations were analyzed. The trend of heavy metal concentrations in Batna, Fesdis and Djerma samples was Pb>Cr>Cd>Cu. Yet concentrations for Cr 0.31-0.60 mg/l and Cd 0.08-0.23 mg/l exceeded the permissible limits. Our results revealed certain risks for the region of Fesdis and Djerma. Thus, preventive measures must be taken to reduce heavy metal pollution of treated wastewater to preserve agricultural lands and protecting both, human and animal health in the province of Batna.

Risk of Heavy Metals Accumulation in Agricultural Lands by Treated Wastewater as Source of Irrigation in the Province of Batna (East Algeria)