Chloroform was treated with ultrasound at 35 and 283 kHz in a compound parabolic concentrators (CPCs) system to assess the applicability of ultrasound as a supporting process of solar-photocatalysis and verify the enhancement of ultrasound combined solar-photocatalysis. Chloroform was degraded by 22.5% in the Solar/TiO 2 process over a 200 min period. At an ultrasound frequency of 283 kHz, chloroform was degraded by 52.6% (Sono), 47.0% (Sono/TiO 2) and 64.4% (Sono/Solar/TiO 2). On the other hand, at 35kHz, chloroform was degraded by 49.0% (Sono), 46.1% (Sono/TiO 2) and 80.0% (Sono/Solar/TiO 2). Ultrasound at 35kHz was more effective for degrading chloroform in the Sono/Solar/TiO 2 process than 283 kHz. The rate of hydrogen peroxide formation, particle size and specific surface area of TiO 2 were measured to determine why 35 kHz is more effective than 283 kHz.
ASJC Scopus subject areas
- Physics and Astronomy(all)