A Comparative Electrochemical-Ozone Treatment for Removal of Phenolphthalein

<div>(a) Influence of the current density in the COD removal; (b) UV-Vis spectra: (<svg height="5.44961pt" id="M24" style="vertical-align:-0.04982042pt" version="1.1" viewbox="-0.0498162 -5.39979 10.7996 5.44961" width="10.7996pt" 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="M744 70V414H76V70H744Z"></path><glyph.data ascent="900" descent="-389" horiz-adv-x="820" vert-adv-y="820"></glyph.data></g></svg>) PHPH solution in the electrooxidation treatment to pH (<svg height="7.35473pt" id="M25" 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>) 3.11, (⧫) 6.22, and (<svg height="8.68571pt" id="M26" style="vertical-align:-0.2063999pt" version="1.1" viewbox="-0.0498162 -8.47931 9.12938 8.68571" width="9.12938pt" 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="M674 312C674 491 527 636 346 636S19 491 19 312S165 -11 346 -11S674 133 674 312ZM616 312C616 161 495 39 346 39S77 161 77 312S197 586 346 586S616 463 616 312Z" id="g185-27"></path><glyph.data ascent="989" descent="-303" horiz-adv-x="692" vert-adv-y="692"></glyph.data></g></svg>) 9.33 mA⋅cm<sup>−2</sup>.</div>

Journal of Chemistry

fig3

Figure 3

Figure 3: A Comparative Electrochemical-Ozone Treatment for Removal of Phenolphthalein 