Description: Das Projekt "Entwicklung eines Verfahrens zur Wiederverwendung des bei fotografischen Prozessen verwendeten Spuelwassers sowie zur Wiederverwendung oder zum Abbau der entfernten Schadstoffe" wird vom Umweltbundesamt gefördert und von Universität Erlangen-Nürnberg, Institut für Physikalische und Theoretische Chemie, Lehrstuhl für Physikalische Chemie I durchgeführt. The most important substances to be removed are the developing compounds (p-phenylenediamines, p-aminophenols, hydroquinone, phenidones) and their products of oxidation, deamination, hydroxylation and sulfonation, as well as the fixing compounds (in particular thiosulphate and its silver complexes), and the bleaching compounds (certain iron(III)-complexes), as well as complexing agents (EDTA, PDTA, ADA) and compounds like bromide. The harmful compounds will be removed from the wash water of both the development and the fixing process by adsorption at suitable adsorbents. The loaded adsorbents will be substituted by unloaded ones and recycled at a central station. Some of the desorbed compounds will be recovered, the other ones will completely controlled be destroyed by a combined chemical and electrochemical method. This method shall also be used to convert the components of the overflow of photographic baths into biodegradable substances. The procedure for the re-use of the wash water may be applied by all kind of minilabs, in particular by hospitals and medical practices. It may also be used, however, by all companies that use graphic film material. The collection and recycling of the loaded adsorbents may be carried out by those companies which already deal with the waste management of used developing and fixing baths.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Aminophenol ? Ethylendiamintetraessigsäure ? Recycling ? Wasserwiederverwendung ? Eisen ? Bromid ? Silber ? Thiosulfat ? Wiederverwendung ? Komplexbildner ? Photochemie ? Physikalische Chemie ? Abwasserreinigung ? Adsorptionsmittel ? Überschwemmung ? Kind ? Komplexverbindung ? Adsorption ? Krankenhaus ? Schädliche Umwelteinwirkung ? Bleichen ? Oxidation ? Schadstoffabbau ? Abfallwirtschaft ? Elektrochemisches Verfahren ? Verfahrenstechnik ? Wassergefährdende Stoffe ? Wasser ? Stoff ? Schadstoff ? Eisen-III-Komplex ? Hydroquinon ? PDTA ? Phenidon ? ADA ? Phenylendiamin ?
Region: Bayern
Bounding box: 12.53381° .. 12.53381° x 47.795° .. 47.795°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1994-07-01 - 1997-06-30
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