Sonolytic degradation of endocrine disrupting chemical 4-cumylphenol in water.
The sonolytic degradation of endocrine disrupting compound 4-cumylphenol (4-CyP) in aqueous solution was investigated. The influence of operating parameters for sonication process such as 4-CyP initial concentration, frequency, power, pH, temperature and saturating gas was examined. The extent of degradation was inversely proportional to the initial substrate concentration. The rate of 4-CyP degradation was frequency dependent. The degradation rate increased proportionally with increasing ultrasonic power from 20 to 100 W and temperature in the range of 20-50°C. The most favorable degradation pH was acidic media. Destruction in the presence of saturating gas follows the order: argon>air>nitrogen. The 4-CyP degradation was inhibited in the presence of nitrogen gas owing to the free radical scavenging effect in vapor phase within the bubbles of cavitation. The ultrasonic degradation of 4-CyP was clearly promoted in the presence of bromide anions and the promoting effect on degradation increased with increasing bromide concentration. At low 4-CyP concentration (0.05 mg L(-1)), bicarbonate ion drastically enhanced the rate of 4-CyP degradation. Experiments conducted using pure and natural water demonstrated that the sonolytic treatment was more efficient in the natural water compared to pure water.
Laboratory of Environmental Engineering, Department of Process Engineering, Faculty of Engineering, University of Annaba, Annaba, Algeria.
Mahdi
M
Chiha
Oualid
O
Hamdaoui
Stéphane
S
Baup
Nicolas
N
Gondrexon
D052244:Endocrine Disruptors / Q000737:chemistry / Q000528:radiation effects; D010636:Phenols / Q000737:chemistry* / Q000528:radiation effects*; D011829:Radiation Dosage; D013010:Sonication / Q000379:methods*; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects*; D018508:Water Purification / Q000379:methods*
D052244:Endocrine Disruptors; D010636:Phenols; D014874:Water Pollutants, Chemical; D014867:Water; C516284:4-cumylphenol