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This research focused on using coriander seeds as low cost adsorbent to remove heavy metals ions such as lead, zinc, and nickel from wastewater. Different parameters were studied to obtain the best results, such as pH, contact time, adsorbent dosage, concentration of initial metals and agitation speed. The highest results were obtained at pH 6, 105 min contact time, 1 g/100 ml dosage, 50 mg/l initial...