Removal of methyl orange from aqueous solution using a 1.6 MHz ultrasonic atomiser

Ultrasound-Assisted Catalytic Degradation of Methyl Orange with Fe3O4/Polyaniline in Near Neutral Solution

“…It was estimated that around 15% of dye was lost during dyeing process and eventually discharged into environment, 1 exerting heavy pressure on environmental protection and sustainability. [2][3][4][5] The dyeing effluents are colored even in a very low concentration. This necessitates to degrade the dyes in effluents, at least to decolorize them before effluent disposal to environment.…”

“…TiO 2 , Fe 3 O 4 ), 1,2,18,25,26,30 and by using highfrequency ultrasonic atomizer. 3 However, the addition of chemical reagent increases the cost and 4 possibly causes secondary pollution associated with the chemicals. 29 When nonmagnetic catalysts ( e.g.…”

“…4,[21][22][23][24][25] To improve decolorization rate of the dye, combinational techniques are universally adopted involving two or three kinds of AOPs. [1][2][3][4][18][19][20][21][22][23][24][25][26][27][28][29][30] The documented references related to AOPs are focused on increasing the concentration of radicals by adding chemical oxidants (e.g. O 3 , H 2 O 2 , K 2 Cr 2 O 7 ), 2,19,20,29 Fenton's reagent, 4,[21][22][23][24][25] radical-producer (e.g.…”

“…[1][2][3][4][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] An advanced oxidation process has been defined as a process that involves formation and subsequent reactions related to highly reactive free radicals, such as ·OH, ·O 2 -, ·O 2 H, which are capable of oxidizing dyes to render decolorized effluents. 2,19 The decolorization of dyes in an AOP process has two meanings, i.e., partial degradation to form aromatic intermediates and deep mineralization to generate oxyacids, CO 2 , and H 2 O.…”

“…O 3 , H 2 O 2 , K 2 Cr 2 O 7 ), 2,19,20,29 Fenton's reagent, 4,[21][22][23][24][25] radical-producer (e.g. CCl 4 ), 3,4,28,29 and catalyst (e.g. TiO 2 , Fe 3 O 4 ), 1,2,18,25,26,30 and by using highfrequency ultrasonic atomizer.…”