Effect of dye auxiliaries on the kinetics of advanced oxidation UV/H₂O₂ of Acid Orange 7 (AO7)

Abstract

BACKGROUND: The effect of four dye-auxiliary chemicals, typically employed in acid dyeing, on the performance of UV/H 2 O 2 decolouration of the model non-biodegradable dye C.I. Acid Orange 7 (AO7) was investigated. The initial concentration of AO7 was 0.150 g L −1 , while the concentration of the auxiliary compounds (NaCl, Na 2 SO 4 , Na 2 CO 3 and CH 3 COOH) was varied in the range 1-10 g L −1 .

Degradation of C.I. Acid Orange 7 by heterogeneous Fenton oxidation in combination with ultrasonic irradiation

“…Azo dyes, which are characterized by one or two azo‐bonds (‐NN‐), are widely used in numerous industrial applications, such as paper, printing, textile manufacture, as well as leather goods and other chemical uses 19–22. In this work, C.I.…”

Synthesis, characterization and adsorption studies of nano-composite hydrogels and the effect of SiO2 on the capacity for the removal of Methylene Blue dye

“…More than 100,000 types of dyes are utilized in different industries, such as paper, leather, pharmaceutical, cosmetic, and textile. [2][3][4][5] A great number of coloured components generated by textile industries are directly delivered to water. 6 In addition, the degradation of some organic dyes indicates to a potential environmental hazard due to the products containing aromatic amine compounds.…”

“…MB dye causes some health problems, such as eye burns, respiratory insufficiency, nausea, vomiting, and mental confusion even after exposure to small amounts. 9,10 Various methods can be used for the removal of dyes from water, such as coagulation, precipitation, electrode-deposition, membrane filtration, 11 ion exchange, 12 solvent extraction, 13 electrodialysis, 14 advanced oxidation processes, 5 etc. In recent years, adsorption is one of the most simple, easy and economical methods.…”