Catalytic ozonation of an azo-dye using a natural aluminosilicate

Homogeneous and Heterogeneous Catalytic Ozonation of Textile Wastewater: Application and Mechanism

“…The use of natural-based materials may limit the application of synthetic catalysts, which leads to decreased production often harmful to the environment and associated with high costs [88]. Natural minerals can be used as catalyst supports [89,90] or catalysts [91,92]. Due to their functionality and abundance of resources, they are relatively cheap equivalents and may in the future become substitutes for currently used catalysts in environmental protection [92].…”

“…The last presented mineral used for catalytic ozonation of the dye solution is the aluminosilicate Montanit300 ® , and although it is not very active by itself, it gains greater activity after modification with H 2 SO 4 [90]. Inchaurrondo et al found that there are active sites (Mn) on the surface of the mineral, acid treatment increased the Si: Al ratio, the specific surface of the catalyst increased, and the percentage of iron and manganese decreased.…”

Clay, Zeolite and Oxide Minerals: Natural Catalytic Materials for the Ozonation of Organic Pollutants

“…The study aimed to draw attention to this important issue, since the homogeneous catalytic contribution could occur at very low concentrations, and just reporting the metal load over the solid catalyst before and after the reaction is insufficient. Moreover, the study presented by Inchaurrondo et al [ 81 ] reported that the activity of the natural aluminosilicate, Montanit300 ® , was associated to the leached Mn, promoted by the interaction between the catalyst surface and carboxylic acids in solution. It is important to highlight that the homogeneous contribution was observed even at very low Mn concentrations (0.0074–0.066 mg/L).…”

“…Inchaurrondo et al [ 81 ] studied the catalytic ozonation of an azo-dye, Orange (OII), using a natural aluminosilicate rich in natural zeolites: Montanit300 ® . The material was used without a previous treatment (M sample) and modified through acid digestions with HCl (5MH45 sample) or H 2 SO 4 (80MS sample).…”

Degradation of dibutyl phthalate by ozonation in the ultrasonic cavitation–rotational flow interaction coupled-field: performance and mechanism

“…On the other hand, ultrasonic cavitation shows better results when combined with other technique (Zhang et al 2021;Hewage et al 2021). Ozonation treatment can effectively remove organic pollutants from wastewater (Chen and Wang 2020;Garcia-Costa et al 2021;Inchaurrondo et al 2021). Ozone is a powerful oxidizing molecular.…”