Document Type
Article (Restricted)
Publication Date
1-1-2011
Abstract
The objective of this research is to assess critically the experimental rate data for sonochemical oxidation of arsenite [As(III)] at different frequencies and powers in the aqueous phase. The oxidative conversion of As(III) into arsenate [As(V)] was >90% in the range of 283 to 450 kHz. With a power density of 69WL-1, the oxidation of As(III) for 40min at 283kHz showed a second-order rate constant of 7:1 × 102 M-1 s-1, whereas it was 3:8 × 103M-1 s -1 at 450 kHz. As calculated by the calorimetric method, the power transferred into samples was in the range of 7-34.5 W with the two frequencies of 283 or 450 kHz. Approximately 100% oxidation efficiency was obtained with a frequency of 450 kHz and 34.5 W. As the pretreatment process, oxidation by sonication has potential applications to groundwater contaminated with both As(III) and As(V). © 2011 The Japan Society of Applied Physics.
Keywords
Aqueous phase, Calorimetric methods, Different frequency, Oxidation efficiency, Oxidative conversion, Potential applications, Power densities, Pretreatment process, Second-order rate constants, Sonochemical, Groundwater, Groundwater pollution, Rate constants, Oxidation
Divisions
fac_eng
Publication Title
Japanese Journal of Applied Physics
Volume
50
Issue
7 PART
Publisher
IOP Publishing
Additional Information
2 Sp. Iss. SI 794FP Times Cited:5 Cited References Count:18