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A newly designed electric assisted micro-electrolysis filter (E-ME) was developed to investigate its degradation efficiency for coking wastewater and correlated characteristics.The performance of the E-ME system was compared with separate electrolysis (SE) and micro-electrolysis (ME) systems.The results showed a prominent synergistic effect on COD removal in E-ME systems.Gas chromatography/mass spectrometry (GC-MS) analysis confirmed that the applied electric field enhanced the degradation of phenolic compounds.Meanwhile,more biodegradable oxygen-bearing compounds were detected.SEM images of granular activated carbon (GAC) showed that inactivation and blocking were inhibited during the E-ME process.The effects of applied voltage and initial pH in E-ME systems were also studied.The best voltage value was 1 V,but synergistic effects existed even with lower applied voltage.E-ME systems exhibited some pH buffeting capacity and attained the best efficiency in neutral media,which means that there is no need to adjust pH prior to or during the treatment process.Therefore,E-ME systems were confirmed as a promising technology for treatment of coking wastewater and other refractory wastewater.