| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1270157 | Ultrasonics Sonochemistry | 2012 | 6 Pages |
The ultrasonic degradation of p-nitrophenol (p-NP) in aqueous solution with CCl4 enhancement was studied. The effects of operating parameters such as CCl4 dosage, ultrasonic power, media temperature, the initial concentration of p-NP and initial pH value of the aqueous solution on the degradation of p-NP were investigated, and the enhancement mechanism of CCl4 for p-NP sonolysis was also discussed. The results showed that the sonochemical degradation of p-NP was obviously enhanced by adding CCl4. It attributed to the increase OH radicals concentration in the presence of CCl4 as a hydrogen atom scavenger, and the formation of some oxidizing agents such as free chlorine and chlorine-containing radicals. The degradation of p-NP follows a pseudo-first-order kinetics. The degradation rate of p-NP increased with decreasing the temperature, the initial pH value of the solution and decreasing the initial concentration of p-NP. It was also found that p-NP can be mineralized in this process.
► The ultrasonic degradation of p-NP can be remarkably enhanced with CCl4 addition. ► The enhancement mechanism of CCl4 for the p-NP sonolysis was discussed. ► p-NP can be mineralized by sonication in the presence of CCl4.
