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| Research on Degradation of Congo Red by Sodium Persulfate Activated with Resin Supported Nano Zero-valent Iron |
| ZHENG Xiao-hua1, WANG Li-na2, REN Li2 |
| 1. Qinggong College, Hebei United University, Tangshan 063000，China; 2. Qian'an College， Hebei United University, Tangshan 064400，China |
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Abstract Oxidative degradation of congo red （CR） in aqueous solution by resin of zero valent iron nanoparticles （NZVI, nanoscale zero-valentiron）and activated sodium peroxydisulfate （PDS） was investigated. The degradation process was based on generation of sulfate radicalsas powerful oxidizing species. The effects of temperature, pH value, the dosages of NZVI-resin, the concentration of sodium persulfate on congo red were examined in batch experiments. In addition, its degradation kinetics was discussed. The results showed that under the condition of pH = 3, Fe0 dosage 0.067 g·L-1, Na2S2O8 dosage 0.67 g·L-1, the degradation efficiency of a initial CR concentration 20 mg·L-1could reach 84.59%,and the degradation of congo red followed the first order kinetics.
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