Removal of methyl orange from aqueous solution using a 1.6 MHz ultrasonic atomiser
Date
2013
Authors
Thangavadivel, K.
Owens, G.
Okitsu, K.
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RSC Advances, 2013; 3(45):23370-23376
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Abstract
Under 1.6 MHz atomisation, methyl orange (MO, 10 mg L 1) removal was mainly influenced by the calorimetric power, so that as the calorimetric power doubled, MO removal (%) increased three-fold. MO removal was favoured by low pH, low solution volume and high air flow rate. By analysing the effect of a radical scavenger on MO removal, it was found that the major MO removal mechanism was sonochemical degradation of MO in the bulk solution due to cavitation. CCl4 (100 mg L 1) increased MO removal by 22.9% from a 90 mL solution having 10 mg L 1 MO at pH 2. Atomiser design is thus an important factor to consider when implementing sonochemical remediation to ensure that the maximum possible calorimetric energy intensity is obtained within the atomiser.
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Copyright 2013 The Royal Society of Chemistry