This study compared the performance of self-producing persulfate (PS) in situ from different blue TiO2 nanotube array (bTNA) anodes doped with the rare earth element gadolinium (Gd) at different concentrations (0.03 mol/L, 0.05 mol/L, 0.1 mol/L Gd(NO?)?) , and soil column experiments were employed to evaluate their effectiveness in degrading anthracene (ANT) in soil column when used as anode. The results showed that the 0.05M Gd-bTNA electrode exhibited the highest oxygen evolution potential (2.51 V vs Ag/AgCl) and PS production concentration (3.38 mmol/L), outperforming undoped electrodes. Furthermore, acidic conditions and high electrolyte concentrations and current density were found to favor PS generation; Through comprehensive characterization of the electrodes’ morphology, structure, elemental composition, and electrochemical properties, the enhancement mechanisms were revealed to include increased oxygen vacancy density, optimized electronic structure, and enlarged electrochemical active surface area; Soil column experiments further demonstrated that the 0.05M Gd-bTNA electrode achieved significantly better ANT degradation compared to traditional boron-doped diamond (BDD) electrodes. This research provides theoretical foundation and technical support for the development of efficient and stable self-producing oxidant electrode materials, promoting the application of EK-ISCO technology in organic contaminated soil remediation.