2 research outputs found
Survey On Degradation Rates Of Trichloroethylene In Aqueous Solutions By Ultrasound
Sonochemical degradation of different compounds such as chlorinated
aliphatic hydrocarbons is one of the recent advanced oxidation
processes and it may be effective for removing low concentration
organic pollutants from aqueous streams. Trichloroethylene (TCE) is one
of these compounds that is mainly used as a degreaser. Important
studies about TCE sonolysis have been focused at millimolar levels and
natural pH, but in this study the ultrasonic degradation of TCE at
different micromolar initial concentrations (30, 300 and 3000
µg/L) and 4 different initial pH with a 35 kHz frequency was
investigated. Furthermore, the degradation of TCE by ultrasound with
different concentrations of hydrogen peroxide at pH= 7 was also
performed. Gas chromatography with FID detector was used for analyses
of TCE. Results showed that the degradation of TCE increased with
decrease in the initial concentration of TCE from 3000 to 30 µg/L
at all initial pH. Initial pH of solution and different concentrations
of H2O2 did not affect significantly the TCE destruction