De-Colorization of Azo Dyes C.B-10X Blue and C.B.M-10X Blue by Ozonation for Wastewater Treatment

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Syed Salman Shafqat
Mustafa Kamal Pasha
Muhamma Asim


This study was designed to understand the role of ozone for the treatment of wastewater due to its exceptional oxidizing potential over the other oxidants. De-colorization of C.B-10X Blue and C.B.M-10X Blue dyes present in textile wastewater was investigated and various parameters include the rate of ozone generation; pH, airflow rate of ozone and the initial concentration of the dyes was studied for process optimization. Ozonation carried out with the aid of an ozone generator. Ozone treatment showed a decrease in color at low dye concentration (100ppm) at acidic pH. The decolorizing values of C.B-10X Blue and C.B.M-10X Blue were up to 75 and 72% respectively. The decrease in color intensity was also observed at different intervals of Ozonation that revealed less and abnormal color decrease at higher concentrations (300 ppm & 500 ppm).

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Sajid, M., Irfan Ahmad, M., Salman Shafqat, S., Kamal Pasha, M., & Asim, M. (2020). De-Colorization of Azo Dyes C.B-10X Blue and C.B.M-10X Blue by Ozonation for Wastewater Treatment. University of Wah Journal of Science and Technology (UWJST), 4, 1-7. Retrieved from


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