首页|Enhanced degradation of residual potassium ethyl xanthate in mineral separation wastewater by dielectric barrier discharge plasma and peroxymonosulfate
Enhanced degradation of residual potassium ethyl xanthate in mineral separation wastewater by dielectric barrier discharge plasma and peroxymonosulfate
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NSTL
In the study, dielectric barrier discharge (DBD) plasma was used to activate peroxymonosulfate (PMS) for synergetic degradation of residual potassium ethyl xanthate (PEX) in mineral separation wastewater. The degradation efficiency of PEX in the combined system was obviously higher, indicating that the system had a significant synergistic effect on PEX degradation. After 25 min, approximately 90.5% of PEX and 1.637 of synergetic factors were achieved in the DBD/PMS system at 27.5 kV. The increase of PMS concentration resulted in the balance between the consumption and formation reaction of active species. The degradation efficiency of PEX under acidic conditions was higher. The addition of Cl~-, CO3~(2-) and HA had an inhibition effect on PEX degradat ion due to the consumption of·OH and·SO4~-, and the presence of Cu~(2+) promoted PEX degradation. The introduction of EtOH had a significant inhibitory effect, indicating that·S04" and·OH played a crucial part. The addition of PMS increased the dissolved 03 and H202 concentration in the combined system. The COD degradation and TOC mineralization efficiency gradually improved with the extension of treatment time for actual xanthate wastewater. A possible degradation pathway of PEX was proposed based on the degradation products.
NSTL
