Detoxification and Desilvering of Photographic Processing Effluents by an Alternative Technology: Photocatalysis at Semiconductor/Solution Interfaces
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Abstract
Four principal types of organic developing agents are typically used in photographic science: (a) HO- (CH=CH)n-OH, (b) HO-(CH=CH)n-NH2, (c) H2N-(CH=CH)n-NH2 and (d) heterocyclics, for either black-and-white or color film development. Once the developing chemistries of these agents have been achieved, they and their oxidized product(s) in the bath together with the wash solutions in the fixer stage that contain silver and silver complexes need to be disposed of. A heterogeneous photocatalytic technology is described that can be employed to discharge such tasks. The technology is based on illuminating a suitable semiconductor photocatalyst (plentiful and non-toxic) that completely destroys the organics and permits the recovery of silver and other metals that have been used in the photographic formulations.
© 2017 by Walter de Gruyter Berlin/Boston
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- Titelei
- Contents
- Editorial
- Feature Article
- Kinetic Modeling of Free-Radical Water Treatment Processes: Pitfalls, Practicality, and the Extension of the Hoigné/ Bader/ Staehelin Model
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- Free Radicals Generated in Photocatalytic Oxidation of Some Amines and Diamines
- Electron Beam Treatment of Flue Gas with High Content of SO2
- SO2 Oxidation by Simultaneous Application of Electron Beam and Electric Field in Humid Air
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- Sunlight Induced Decoloration/Degradation of Non-Biodegradable Orange II Dye by Advanced Oxidation Technologies in Homogeneous and Heterogeneous Media
- Quantum Yields for the Photodegradation of Pollutants in Dilute Aqueous Solution: Phenol, 4-Chlorophenol and N-Nitrosodimethylamine
- Detoxification and Desilvering of Photographic Processing Effluents by an Alternative Technology: Photocatalysis at Semiconductor/Solution Interfaces
Articles in the same Issue
- Titelei
- Contents
- Editorial
- Feature Article
- Kinetic Modeling of Free-Radical Water Treatment Processes: Pitfalls, Practicality, and the Extension of the Hoigné/ Bader/ Staehelin Model
- Research Articles
- Oxidative Degradation and Fluorescence of a Non-biodegradable Brightener via Titania Suspensions: Implications for the Natural Cycle
- Free Radicals Generated in Photocatalytic Oxidation of Some Amines and Diamines
- Electron Beam Treatment of Flue Gas with High Content of SO2
- SO2 Oxidation by Simultaneous Application of Electron Beam and Electric Field in Humid Air
- Study at 20 kHz and 500 kHz of the Ultrasound-Ozone Advanced Oxidation System : 4-Nitrophenol Degradation
- Sunlight Induced Decoloration/Degradation of Non-Biodegradable Orange II Dye by Advanced Oxidation Technologies in Homogeneous and Heterogeneous Media
- Quantum Yields for the Photodegradation of Pollutants in Dilute Aqueous Solution: Phenol, 4-Chlorophenol and N-Nitrosodimethylamine
- Detoxification and Desilvering of Photographic Processing Effluents by an Alternative Technology: Photocatalysis at Semiconductor/Solution Interfaces
