DEGRADATION OF BUTYLPARABEN IN WATER BY ACTIVATION OF HYDROGEN PEROXIDE BY MIL-100(Fe,Mn)DERIVATIVES
The MIL-100(Fe,Mn)derivative catalyst,with new established active sites and regulated structure,was synthesized by hydrothermal method and calcination method to activate H2O2 for the removal of the typical new pharmaceutical pollutants,butylparaben(BPB)in water.The effects of catalyst dosage and water environmental chemical conditions(such as initial pH,reaction temperature,co-existing ions,etc.)on the degradation of BPB in water by MIL-100(Fe,Mn)derivatives were detailly investigated,and the active species in the reaction system were also analyzed.The results showed that the MIL-100(Fe,Mn)derivative catalytic system showed good catalytic performance in a wide range of pH and solution temperature,and increasing the catalyst dosage was conducive to the activation of H2O2 oxidation of BPB in water.Preferably,96％of BPB could be oxidized within 15 min by the MIL-100(Fe,Mn)derivative catalytic system under the conditions of pH=7.0,298 K(25 ℃),0.2 g/L catalyst and 1 mmol/L H2O2.In addition,the introduction of HCO3-in the reaction system significantly inhibited the degradation of BPB,but different concentration of NO3 and Cl-had little effect on the degradation of BPB in water.The synergistic interaction between Fe/Mn metal ions on the surface of MIL-100(Fe,Mn)derivative catalyst could promote the decomposition of H2O2 to generate*OH,and then rapidly oxidize BPB in water.
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