tailieunhanh - Investigation on acid leaching of e-waste scraps obtained from modem boxes

The precipitation was done using sodium metabisulfite (Na₂S₂O₅). The elements in output residue obtained from acid leaching were identified using ICP-OES. Concentration of silver was found to be highest with the value of mg/l among all the other elements present. Similarly, in header pins residue the concentration of silver was found to be mg/l and copper mg/l. The silver present in the IC chip ash was found to be mg/l and the concentration of copper was mg/l. | Investigation on acid leaching of e-waste scraps obtained from modem boxes