《Table 1.Comparison of TOC and COD removal under different treatments.》

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《Strengthening decomposition of oxytetracycline in DBD plasma coupling with Fe-Mn oxide-loaded granular activated carbon》

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Furthermore，when the bimetallic oxide-loaded GAC was introduced into the DBD system，the OTC degradation efficiency and rate were both improved.The OTC removal was augmented to 93.5%at 20 min.This phenomenon indicated that the hybrid catalyst exhibited better catalytic activity，manifesting in turn that the immobilized component Fe and Mn oxides could further improve the catalytic effect.It isgenerally believed that the composite could better catalyze the O3decomposition into·OH，HO2·and O2-·radicals，furtherenhancing the decontamination of OTC.Furthermore，the Fe-Mn oxide coating increased the TOC and COD removal ratio，and these experimental results are shown in table 1.After 20 min of treatment，only 36.7%and 21.2%of TOC and COD，respectively，were eliminated in the DBD system，whereas 42.3%and 28.5%of TOC and COD were degraded in the DBD?+?Fe-Mn GAC system，which were increased by5.6%and 7.3%，respectively，over the sole DBD treatment.These results corresponded to the above-mentioned OTC degradation tests.Moreover，the calculated G50value was0.23 mg kJ-1in the DBD?+?Fe-Mn GAC system，an increase of 33.4%over the single DBD system，suggesting that the introduction of Fe-Mn GAC was also beneficial to the improvement of energy efficiency of discharge plasma.