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- Title
Degradation of Methylene Blue in Water by Combined Sonolysis and Fenton's Reaction.
- Authors
Tie-Ling Xing; Guo-Qiang Chen; Irl, Josef; Chu, Khim H.
- Abstract
The degradation of methylene blue, a cationic dye, upon exposure to ultrasound at 24 kHz using a direct immersion ultrasonic probe was investigated. The rate of decolorization for a 5 mg/L aqueous dye solution at 20C and 200W/L power density followed pseudo first-order kinetics with a rate constant of 0.014-1 min This was increased by a factor of 3.4 when small amounts of ferrous ion (Fe(II), 1 mg/L) were added. At an initial dye concentration of 50 mg/L, 92% decolorization and 60% chemical oxygen demand (COD) reduction was achieved after 360 min sonication. The rate enhancement was attributed to the reaction of Fe(II) with sonochemically-generated hydrogen peroxide (H2O2) via the classical Fenton's reaction, thereby degrading nonvolatile toxic compounds such as methylene blue.
- Subjects
DYES &; dyeing; METHYLENE blue; FENTON'S reagent; OXIDATION; ULTRASONIC imaging; IRON ions; CHEMICAL oxygen demand
- Publication
AATCC Review, 2009, Vol 9, Issue 2, p37
- ISSN
1532-8813
- Publication type
Article