Treatment of textile dyes in a photo-surface dielectric barrier discharge hybrid reactor: Unraveling the degradation mechanisms.

The study demonstrates the unprecedented ability of UV-C integrated surface dielectric barrier discharge (photo-SDBD) in the rapid removal of azo (brilliant red X3B), direct (direct yellow - 44), and reactive dyes (turquoise blue H5G) in textile wastewater. The degradation mechanisms of these dyes were studied using a high-resolution mass spectrometer (HRMS), and a step-by-step reaction pathway was proposed. The BR-X3B and DY-44 dyes undergo azo bond dissociation followed by functional group rearrangement, ring opening, and formation of open chain intermediates.

UV-C photon integrated surface dielectric barrier discharge hybrid reactor: A novel and energy-efficient route for rapid mineralisation of aqueous azo dyes.

The study describes developing an energy-efficient and scalable alternative to conventional non-thermal plasma systems by integrating surface dielectric barrier discharge (SDBD) and UV-C radiation sources. The unprecedented enhancement in the mineralisation rate of an azo dye (brilliant red 5B) by the hybrid reactor (photo-SDBD) is demonstrated thoroughly as a function of dye concentrations, pH, and background salts. The photo-SDBD is 1.