Study on the efficient degradation of dyes by ferrocene-functionalized chitosan microspheres
Traditional adsorbents can only adsorb pollutants,but cannot degrade them.A novel functionalized porous microsphere material(CS-Fc)was prepared by emulsion crosslinking method using ferrocene(Fc)as Fenton reactive group and crosslinking agent and chitosan(CS)as skeleton.CS-Fc could not only rapidly adsorb the anionic dye methyl orange(MO),but also rapidly remove the cationic dye methylene blue(MB)by introducing catalytic degradation.The removal efficiencies for MO and MB increased from 32％to 99％and from 5％to 99％,respectively.The CS-Fc/H2O2 system could still maintain a high removal rate of more than 95％under neutral and high concentration wastewater condition.Through free radical quenching experiments,it could be seen that hydroxyl radicals were the main reactive oxygen species involved in degradation.Through simple centrifugation and water washing,the removal rate was more than 85％after five cycles.This functionalized green porous microsphere can be a promising material for the treatment of broad-spectrum pollutants.
chitosan microsphereFenton degradationanionic and cationic dyes
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