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

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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 64.40 mg/l among all the other elements present. Similarly, in header pins residue the concentration of silver was found to be 14.18 mg/l and copper 7.68 mg/l. The silver present in the IC chip ash was found to be 13.99 mg/l and the concentration of copper was 7.77 mg/l. | Investigation on acid leaching of e-waste scraps obtained from modem boxes

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