ABSTRACT

Effect of acidification on advanced oxidation performance of ozone-electrolysis was explored by experimental and theoretical approaches. A series of experiments revealed that ozone-electrolysis had a synergistic effect on 1,4-dioxane removal. Two radical production pathways, namely ozone self-decomposition and one-electron reduction of ozone, are involved in ozone-electrolysis. A series of discussions based on the contribution of HO˙ produced through ozone self-decomposition, chemical equilibrium of HO₃˙/O₃˙⁻, and equilibrium electrode potentials elucidated that acidification inhibited the one-electron reduction of ozone at the cathode through the enhancement of competitive two-electrons reduction of ozone by a change in the corresponding equilibrium electrode potential.

摘要

通过实验和理论方法探讨酸化对臭氧电解高级氧化性能的影响。一系列实验表明，臭氧电解对 1,4-二恶烷的去除具有协同作用。臭氧电解涉及两种自由基产生途径，即臭氧自分解和臭氧单电子还原。基于臭氧自分解产生的HO˙贡献的一系列讨论，HO ₃ ˙/O ₃ ˙的化学平衡^-和平衡电极电位表明，酸化通过改变相应的平衡电极电位来增强臭氧的竞争性双电子还原，从而抑制了阴极处臭氧的单电子还原。