Sonochemical degradation of endocrine-disrupting organochlorine pesticide Dicofol (cas 115-32-2): Investigations on the transformation pathways of dechlorination and the influencing operating parameters

Add time:08/24/2019    Source:sciencedirect.com

Dicofol, an extensively used organochlorine pesticide and a recommended Stockholm convention persistent organic pollutant (POP) candidate is well known for its endocrine disruptive properties. The sonochemical degradation of Dicofol in aqueous media has been investigated using a 20-kHz probe type sonicator with power inputs from 150 to 450 W. The degradation rate was determined as a function of concentration of Dicofol, solution pH, bulk phase temperature, ultrasonic power density and H2O2 addition. At optimum operating conditions, the pseudo-first-order degradation rate constant (k) was determined to be 0.032 min−1 and the extent of degradation was found to be 86% within 60 min of ultrasound treatment. High performance liquid chromatography (HPLC) and Gas chromatography coupled with mass spectroscopy (GC-MS) analysis indicated the presence of degraded products. The obtained results of Dicofol degradation and control experiments in the presence of H2O2 and radical scavenger test suggest thermal decomposition along with radical attack at bubble-vapor interface to be the dominant degradation pathway. Sonochemical treatment is effective and promising for successful removal of harmful pesticides such as Dicofol and superior removal efficiency for other POPs is expected in the near future with the successful implementation of ultrasound-based wastewater treatment.

We also recommend Trading Suppliers and Manufacturers of Dicofol (cas 115-32-2). Pls Click Website Link as below: cas 115-32-2 suppliers

Prev:Mechanism and kinetics studies of the atmospheric oxidation of p,p'-Dicofol (cas 115-32-2) by OH and NO3 radicals
Next:Reaction mechanism of Dicofol (cas 115-32-2) removal by cellulase)