Fenton-like reaction by pyrite suspension was applied to degrade gas-phase toluene in a continuous system. Gas-phase toluene (30 ppm) constantly flowing into pyrite Fenton system was removed by minimum 83% continuously during 4 hr. Toluene volatilized from pre-contaminated sand (300 mg/kg) was fully removed by the pyrite Fenton system in 4 hr. No specific products in gas-phase were detected during oxidative degradation of toluene, although benzyl alcohol and benzoic acid were found in liquid-phase. Identification of radical species effective on degradation of gas-phase toluene in pyrite Fenton system showed that OH� was the main oxidant in this system. Analysis by x-ray diffraction and ion chromatograph revealed that the catalyst can be used for 1 day, making possible to estimate the exchanging time for the catalyst. The results can provide basic knowledge to understand heterogeneous Fenton reaction to treat soil and groundwater contaminated by volatile organic compounds.

Degradation of gas-phase toluene continuously entering in pyrite Fenton system

244th National Meeting (2012)

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