PHOTODEGRATION OF METHYLENE BLUE AND TANNERY WASTEWATER BY C, N CO-DOPED TITANIUM DI-OXIDE
Keywords:dyes, photocatalysis, semiconductors, doping, photodegradation
Water is the most essential part of biological life but it is often contaminated by dyes and causes aesthetic problems in addition to health effects. The scarcity of clean water is on increase. Ultrasonic procedures, ozonation, electrochemical treatment, membrane separation, adsorption, and photocatalysis are the modern techniques used in separating dyes from water. Most of these techniques have limitations, but the use of semiconductors in decolorization through photocatalysis has attracted the interest of researchers as an ecologically benign and cost-effective strategy. Titanium dioxide was used as a photocatalytic degradant having a band gap of Eg 3.2 eV. Doping is an effective method for narrowing the band gap of TiO2. In this study, an N and C co-doped TiO2 was used and the samples were placed in a UV chamber for photodegradation. Primarily, the technology was tested for Methylene Blue and after that, for the dismounted wastewater from Tannery industries. Primary and secondary filtering were done for both the Methylene Blue and Tannery wastewater. Primary filtering was done using normal filter paper and secondary filtering was done using a Sterile Syringe Filter having a 0.45µm PES. Photocatalysis using co-doped TiO2 in MB and wastewater has been demonstrated for various concentrations. Color removal of low-concentrated MB was more satisfactory than that of the higher concentration. The absorbance of the higher concentration of Methylene Blue showed significant errors. The color removal efficiency of TiO2 for Tannery wastewater was moderate.
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