Efficient remediation of o-dichlorobenzene-contaminated soil using peroxomonosulfate-ferrate-FeS hybrid oxidation system
To degrade the chlorobenzenes from contaminated soil, herein, a novel peroxomonosulfate-ferrate-FeS (PFI) hybrid oxidation system has been proposed. Take the o-dichlorobenzene as a typical contaminant, results of bottle tests show that the PFI oxidation system performs well in removing the pollutant, achieving up to 93% of removal efficiency in less than 30 min. With the orthogonal experiments, the effects of different parameters on the degradation of o-dichlorobenzene have been systematically investigated. The degradation of the o-dichlorobenzene by the PFI oxidation system is found to be well matched by the quasi-first order kinetic model. Further mechanistic study shows that, in this system, a proper addition of FeS could not only facilitate the activation of persulfate to produce sulfate radicals to oxidize o-dichlorobenzene, but also enhance the conversion of ferrate(VI) to produce Fe(V) and Fe(IV) to attack o-dichlorobenzene. In this way, the peroxomonosulfate and ferrate could perform synergistically with the presence of FeS in degrading the o-dichlorobenzene. The o-dichlorobenzene is found to be degraded into o-chlorophenol, 2,3-dichlorophenol, 3,4-dichlorophenol and chlorohexane, and finally to be CO 2 , H 2 O, HCl. In addition, results also show that the application of PFI oxidation system could reduce heavy metals in the soil and improve the soil permeability.
危险品化学品经营许可证（带存储）