Sono-Fenton Degradation of Basic Blue 3 Dye: Understanding the Mechanism, Parametric Effect and Kinetic Studies

摘要

Sonochemical method is an advanced oxidation process used to degrade organic compounds and has the potential for use in environmental remediation through the formation of highly reactive radicals. In this study, sonochemical decolourization of Basic Blue 3 (BB3) dye, the effects of various parameters influencing the degradation of the dye was studied and the mechanisms of dye degradation were analyzed. Parametric studies such as hydrogen peroxide, initial solution pH, gas content (Ar, O_2, Air and N_2) and NaCl addition were performed to understand the mechanism of degradation. From these studies, the hydrolysis reaction of ~·OH radical with BB3 dye molecule in the bulk liquid medium has found to be the determining factor to efficiently degrade the dye. Then, hydrolysis reaction was intensified through Fenton's reagent addition and larger diameter tip probe (25 mm). Complete colour removal of dye solution was obtained at condition, BB3: 2.78 × 10~(-5) mol/L, initial solution pH: 3, FeSO_4: 0.5 mM, H_2O_2: 17.64 mmol/L, Reaction time: 60 min., Probe tip diameter: 25 mm. GCMS study revealed that there were intermediates remained in the solution, although there were complete dye colour removal. This study provides an insight on the parametric, mechanistic and complete understanding of the sonochemical degradation of BB3 dye.