Removal of heavy metals in wastewater from dyeing industry with soil sediments from the tap water production process and Fly ash from coal-fired power plants

Abstract

Sediments from the water production process and fly ash from the production of coal-fired power plants are used as adsorbents to remove heavy metals, lead, iron, and zinc in synthetic wastewater from the dyeing industry. From the experiment, it was found that the optimum pH for adsorbing heavy metals with fly ash and sediment was pH 8 and pH 7, respectively. The optimum concentration of lead, iron, and zinc heavy metal solutions of fly ash and sediment is 10 mg/L. Efficiency in the adsorption of heavy metals, lead, iron, and zinc, it was found that the appropriate contact time that affects the adsorption of heavy metals of fly ash is 90 minutes, with percentages equal to 99.50%, 98.70%, and 99.70%, respectively, and sediment had good percentage removal of all three types of heavy metals at a contact time of 60 minutes with percentages equal to 98.90, 95.90, and 98.90 respectively. The optimum amount of sediment was and fly ash used as adsorbent is 20 grams.