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Radiation Protection Dosimetry 2005 116(1-4):518-520; doi:10.1093/rpd/nci076
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© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Declassification of radioactive liquid wastes generated in radio immune adday (RIA) laboratories

M. Sancho*, J. M. Arnal, J. I. Villaescusa, J. M. Campayo and G. Verdú

Chemical and Nuclear Engineering Department, Polytechnic University of Valencia Camino de Vera s/n 46022 Valencia Spain

* Corresponding author: msancho{at}iqn.upv.cs

Radioactive liquid wastes of low–medium activity level are generated in radio immune assay (RIA) laboratories, which are also potentially infectious because of the pathogens from patient blood. The most common way of managing these wastes consists of a temporal storage, for partial radioactivity decay, followed by management by an authorised company. The object of this work is to study the viability of treating radioactive liquid wastes coming from RIA using membrane techniques in order to reduce their volume, which would mean an improvement from the radiological point of view and a decrease in management costs. This paper describes the results of some experiments carried out with RIA real wastes, by means of processes such as ultrafiltration and reverse osmosis. It has been proved that waste volume can be significantly reduced, obtaining a treated liquid that is free of pathogens and organic matter and with an activity level around the environmental background.


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