Investigations into Recycling Zinc from Used Metal Oxide Varistors via pH Selective Leaching: Characterization, Leaching, and Residue Analysis

<div>The leached fraction as given by the left ordinate for zinc (<svg height="7.35473pt" id="M31" style="vertical-align:-0.3499303pt" version="1.1" viewbox="-0.0498162 -7.0048 7.75925 7.35473" width="7.75925pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M552 -3V513H36V-3H552ZM494 47H94V463H494V47Z" id="g117-128"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="587" vert-adv-y="587"></glyph.data></g></svg>), bismuth (○), and antimony (∆) from MOV in (a) pH 1, (b) pH 3, and (c) pH 5 solutions. The volume of nitric acid (HNO<sub>3</sub>) added is shown as a solid black line corresponding to the right ordinate.</div>

The Scientific World Journal

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Figure 5

Figure 5: Investigations into Recycling Zinc from Used Metal Oxide Varistors via pH Selective Leaching: Characterization, Leaching, and Residue Analysis 

Figure 5 | Investigations into Recycling Zinc from Used Metal Oxide Varistors via pH Selective Leaching: Characterization, Leaching, and Residue Analysis 