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Organic dyes are ubiquitous pollutants in various aquatic environments as they are produced in abundance and used widely. In the present work, the degradation and mineralization of various organic dyes such as methylene blue (MB), methyl orange (MO), and rhodamine B (RhB), following the electron beam irradiation method in the presence of a graphitic carbon nitride/carbon nanodots/Fe(II) (CN/CD 3 /Fe 6 ) composite, were studied. The removal efficiency of MB reached 81.7% under conditions of electron beam irradiation (EBI) when the total irradiation dose was 5 kGy. This increased to 91.2% in the presence of the CN/CD 3 /Fe 6 composite. The mineralization efficiency increased from 30.1 to 47.3% when the composite was added, and the total irradiation dose was 20 kGy. The removal efficiency of organic dyes was not significantly affected in the pH range of 3-11. Results from cyclic experiments conducted using MB degradation indicated that the CN/CD 3 /Fe 6 composite exhibited good stability and reusability even after five irradiation cycles. Results from scavenging experiments revealed tha • OH was the predominant reactive species during the MB degradation process. Intermediates produced in the synergistic system (EBI&amp;CN/CD 3 /Fe 6 system) consisting of the CN/CD 3 /Fe 6 composite and EBI were detected using the liquid chromatography-mass spectrometry (LC-MS) technique. Based on the results, the possible degradation mechanism and pathways for MB were proposed.

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Degradation of Organic Dyes Using the Ionizing Irradiation Process in the Presence of the CN/CD<sub>3</sub>/Fe<sub>6</sub> Composite: Mechanistic Studies

Degradation of Organic Dyes Using the Ionizing Irradiation Process in the Presence of the CN/CD3/Fe6 Composite: Mechanistic Studies

Degradation of Organic Dyes Using the Ionizing Irradiation Process in the Presence of the CN/CD₃/Fe₆ Composite: Mechanistic Studies