This work aims to investigate the enhancement of the efficiency of phytoremediation (phytoR) by electrokinetic remediation (ER) by using graphite electrodes to depollute soil contaminated with petroleum. It was focused on the effects of electric fields (by applying direct current (DC) of reversal polarity (RP)) as well as the growth of sunflower plants after soil remediation. In this case, five experimental setups were used, phytoR, ER and electro-phytoremediation (ER-PhytoR) by supplying DC (ER-PhytoR-DC) or RP (ER-PhytoR-RP). Regarding the total petroleum hydrocarbon (TPH) removal, it was more efficient for the ER-phytoR-RP carried out at 1 V cm⁻¹ after 20 d where microbial degradation in the rhizosphere and organic compounds transport through the soil associated to the RP (contributing to avoid the acidity and alkaline fronts in the soil), were the key operating parameters. Results clearly showed that the application of RP favoured the germination, growth of plants and high TPH removal after 20 d. It was also demonstrated by higher biomass production achieved at different treatments; 5.22 g for phytoR, 1.137 g for ER-phytoR-DC and 5.89 g for phytoR-ER. Finally, two diamond based-electrochemical technologies (anodic oxidation (AO-H₂O₂) and electro-Fenton (EF)) have been used for treating the effluents generated by soil decontamination to eliminate the dissolved organic matter.

这项工作旨在研究通过使用石墨电极去污污染石油的土壤，通过电动修复（ER）增强植物修复（phytoR）的效率。它集中于电场的影响（通过施加反向极性的直流电（DC））以及土壤修复后向日葵植物的生长。在这种情况下，通过提供DC（ER-PhytoR-DC）或RP（ER-PhytoR-RP），使用了五个实验设置phytoR，ER和电修复（ER-PhytoR）。关于总石油烃（TPH）的去除，对于在1 V cm ^-1下进行的ER-phytoR-RP效率更高20 d后，根际中的微生物降解和有机化合物通过与RP相关的土壤运输（有助于避免土壤中的酸度和碱度），这是关键的操作参数。结果清楚地表明，施用RP有利于20 d后发芽，植物生长和较高的TPH去除率。在不同的处理方法下，更高的生物量产量也证明了这一点。phytoR为5.22 g，ER-phytoR-DC为1.137 g，phytoR-ER为5.89 g。最后，两种基于金刚石的电化学技术（阳极氧化（AO-H ₂ O ₂）和电子芬顿（EF））已用于处理土壤去污产生的废水，以消除溶解的有机物。