The destruction of the herbicide chloramben in 0.050 M Na₂SO₄ solutions at natural pH has been studied by photoelectro-Fenton with UVA light (PEF). The trials were carried out in a cell equipped with an air-diffusion cathode for H₂O₂ generation and different electrocatalytic anodes, namely active IrO₂-based and RuO₂-based electrodes and non-active boron-doped diamond (BDD) and PbO₂ ones. Similar removal rates were found regardless of the anode nature because the herbicide was mainly oxidized by OH formed from Fenton's reaction, which was enhanced by UVA-induced photo-Fenton reaction. The use of an IrO₂-based anode led to almost total mineralization at high current density, as also occurred with the powerful BDD anode, since photoactive intermediates originated from OH-mediated oxidation were degraded under irradiation with UVA light. The good performance of the IrO₂-based anode in PEF was confirmed at different current densities and herbicide concentrations. The presence of Cl⁻ in the medium caused a slight deceleration of herbicide removal as well as mineralization inhibition, owing to the production of active chlorine with consequent formation of persistent chloroderivatives. Seven aromatic products along with oxalic and oxamic acids were identified in sulfate medium. Five aromatic derivatives were detected in Cl⁻-containing matrix, corroborating the generation of organochlorine compounds. In secondary effluent, larger mineralization was achieved by PEF with a BDD anode due to its high oxidation ability to destroy the chloroderivatives, although an acceptable performance was also obtained using an IrO₂-based anode.

用紫外光（PEF）光电芬顿研究了在自然pH下0.050 M Na ₂ SO ₄溶液中除草剂苯虫杀螨剂的破坏。试验在配备有用于产生H ₂ O ₂的空气扩散阴极和不同电催化阳极的电池中进行，即活性IrO ₂基和RuO ₂基电极以及非活性硼掺杂金刚石（BDD）和PbO ₂个。无论阳极性质如何，都发现了相似的去除率，因为除草剂主要被芬顿反应形成的OH氧化，而UVA诱导的光芬顿反应增强了该除草剂。IrO ₂的使用碱性阳极在高电流密度下几乎导致全部矿化，这与强力BDD阳极同样发生，因为源自OH介导的氧化的光敏中间体在UVA光的照射下会降解。在不同的电流密度和除草剂浓度下，证实了基于IrO ₂的阳极在PEF中的良好性能。氯的存在^-在培养基中引起除草剂去除以及矿化抑制的轻微减速，由于生产具有随之形成持久chloroderivatives的活性氯。在硫酸盐介质中鉴定出七种芳族产物以及草酸和草酰胺酸。在氯法检测五个芳族衍生物^-含基质，证实了有机氯化合物的生成。在次要废水中，由于PEF具有高的破坏氯衍生物的氧化能力，因此使用BDD阳极通过PEF可以实现更大的矿化作用，尽管使用IrO ₂基阳极也可以获得可接受的性能。