Comparative decoloration study of Neutral Red by different oxidative processes

Photocatalytic degradation of Methylene Blue using a mixed catalyst and product analysis by LC/MS

“…It was noted that the absorption value of dye became less with irradiation time, thus indicating the decoloration of dye solution. The decrease in absorption value of dye solution can be related in terms of the photodegradation efficiency (Á) which was evaluated by using the following relationship [3]:…”

“…are now being supplemented by advanced oxidation processes (AOPs). The widely used AOPs include photolysis, Fenton method, photofenton, ozonolysis, sonolysis, and photocatalysis [3][4][5][6]. All these techniques are versatile in nature and have their own pros and con.…”

A comparative study of Neutral Red decoloration by photo-Fenton and photocatalytic processes

“…On the contrary, very little literature is available in terms of comparative studies of dye degradation for a specific dye. In our earlier studies we have reported a comparative study on the efficiency of photolytic oxidation and Fenton process for the decoloration of Neutral Red (belonging to the quinone-imine class of dyes) [11]. Our results showed that the Fenton process was much more efficient than the photolytic process for decolorizing this dye.…”

Degradation of AR 97 aqueous solution by combination of ultrasound and Fenton reagent

“…However, beyond 1.57 mmol L 21 of H 2 O 2 , the degradation ratio was decreased apparently. This is probably because of the selfquenching of hydroxyl radicals form H 2 O 2 [22]. In the presence of excess hydrogen peroxide, it also acted as hydroxyl radical scavenger that led to the generation of the less active perhydroxyl radicals [19].…”