Four different treatment methods based on the HO production were assessed to oxidize and mineralize the herbicide picloram (PCL), which is considered very toxic and so is a potential contaminant of surface and ground water. The processes based on the Fenton type (homolysis reaction of HOCl by Fe²⁺ ions) and photo-Fenton type reaction (using a 9 W UVA light) with in situ electrogenerated HOCl species, using a commercial DSA^® anode in the presence of Cl⁻ ions, led to poor mineralization performances in comparison to the HOCl/UVC process. In that case, the homolysis reaction of HOCl mediated by a 5 or 9 W UVC light resulted in almost complete removal of the organic load within 12 h of treatment, from acidic to neutral solutions and using 1 g L⁻¹ of NaCl concentration after optimization of the experimental conditions. When the HOCl/UVC process using a 5 W UVC light is compared to the electrochemical method using a boron-doped diamond anode (electrochemical/BDD), the oxidation and mineralization rates of the HOCl/UVC process were always superior, with ∼95% removal of total organic carbon (TOC) after 12 h treatment. The energy consumption per unit mass of removed TOC remained around 4 and 8 kW h g⁻¹ for the HOCl/UVC and electrochemical/BDD treatment processes after 90% removal of TOC, respectively, even considering the energy consumption of the UVC lamp. In the final treatment stages, high CO₂ conversions were obtained using both methods, as the generated intermediates were almost completely eliminated. Finally, the HOCl/UVC process is a reasonable option to treat solutions contaminated with organic pollutants as the common problems associated with the Fenton based (acidic solution, Fe²⁺ ion recovery, generation of H₂O₂) and electrochemical/BDD (mass transport) processes can be readily circumvented.

评估了基于HO生成量的四种不同处理方法，以氧化和矿化除草剂吡咯烷酮（PCL），后者被认为具有剧毒，因此也是地表水和地下水的潜在污染物。基于芬顿类型（用Fe次氯酸均裂反应的过程²⁺与离子）和光芬顿型反应（使用9瓦UVA光）在原位电致次氯酸物种，使用市售的DSA ^®在氯的存在下阳极^-与HOCl / UVC工艺相比，离子导致较差的矿化性能。在那种情况下，由5或9 W UVC光介导的HOCl的均相反应导致处理后12小时内从酸性溶液到中性溶液几乎完全去除有机负荷，并在优化后使用1 g L ^-1的NaCl浓度实验条件。当将使用5 W UVC光的HOCl / UVC工艺与使用掺硼金刚石阳极的电化学方法（electrochemical / BDD）进行比较时，HOCl / UVC工艺的氧化和矿化率始终较高，约为95％处理12小时后去除总有机碳（TOC）。去除的TOC的单位质量能耗保持在4 kWh g ^-1和8 kW h g ^-1左右去除90％的TOC后，分别用于HOCl / UVC和电化学/ BDD处理工艺，即使考虑到UVC灯的能耗也是如此。在最后的处理阶段，由于几乎完全消除了生成的中间体，因此使用这两种方法均获得了高的CO ₂转化率。最后，HOCl / UVC工艺是处理被有机污染物污染的溶液的合理选择，这是与Fenton基（酸性溶液，Fe ²⁺离子回收，H ₂ O _2的产生）和电化学/ BDD（质量）有关的常见问题。运输）流程可以很容易地规避。