The treatment of toxic organic pollutants by electro-Fenton (EF) presents some drawbacks such as the necessity to work at low pH and the low solubility of oxygen in water contacted with air or oxygen at room pressure that results often in slow and relatively low abatements. Here, the coupled adoption of natural heterogeneous catalysts and of relatively high pressure was proposed in order to improve the performances of EF for the treatment of organic pollutants. Caffeic acid (CA) and 3-chlorophenol were used as model resistant organic pollutants. EF process was performed using both conventional homogeneous FeSO₄ and natural heterogeneous catalysts (pyrite, chalcopyrite, Fe₂O₃ and Fe₃O₄) as iron catalysts and oxygen at various pressures in the absence or in the presence of BDD anode. The effect of the nature of the catalyst, the oxygen pressure, the current density and the catalyst load was widely investigated in order to optimize the process. It was shown that the coupled utilization of a natural heterogeneous catalyst such as chalcopyrite and a relatively high pressure allows to obtain the total removal of CA and a high removal of the TOC (about 75%) in short times (2 h) with relatively high current efficiencies using an Iridium based anode. In the case of 3-chlorophenol, the utilization of a BDD anode was necessary to achieve a high removal of the pollutant and the TOC. It was shown that the removal of 3-chlorophenol can be effectively performed in different water bodies and with different initial concentrations of 3-chlorophenol.

通过电芬顿 (EF) 处理有毒有机污染物存在一些缺点，例如必须在低 pH 值下工作，以及氧在水中与空气接触的溶解度低或室温下的氧通常导致缓慢且相对较低的减排. 在这里，为了提高 EF 处理有机污染物的性能，提出了采用天然多相催化剂和相对高压的耦合。咖啡酸 (CA) 和 3-氯苯酚被用作模型抗性有机污染物。EF 过程使用常规均相 FeSO ₄和天然多相催化剂（黄铁矿、黄铜矿、Fe ₂ O ₃和 Fe ₃ O ₄) 在不存在或存在 BDD 阳极的情况下，在各种压力下作为铁催化剂和氧气。为了优化工艺，广泛研究了催化剂的性质、氧气压力、电流密度和催化剂负载的影响。结果表明，结合使用天然非均相催化剂（如黄铜矿）和相对较高的压力，可以在短时间内（2 小时）以相对较高的速度完全去除 CA 和高去除 TOC（约 75%）使用基于铱的阳极的电流效率。对于 3-氯苯酚，必须使用 BDD 阳极才能实现污染物和 TOC 的高效去除。