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The purpose of this technical seminar was to evaluate the present state of the art in matter of advanced separation techniques like solvent extraction, ion-exchange, chemical precipitation, membrane and electrical processes for the treatment of radioactive liquid waste and a selection of some specific industrial non-radioactive effluents. Through this initiative, the organisers aimed at promoting the exchange of information between scientists from various origins (universities, research centres and industries) while contributing to the necessary overcoming of the artificial barriers which too often limit the "technology transfer" between the nuclear and non-nuclear sectors. Vll CONTENTS PREFACE ........................................ V ABBREVIATIONS ...................................... xiv OPENING SESSION WELCOME ADDRESS C. MANCINI (ENEA) .................................... 3 OPENING ADDRESS S. FINZI (CEC) ....................................... 7 AREAS WHERE ADVANCED SEPARATION TECHNIQUES ARE DESIRABLE G. GROSSI (ENEA), L. CECILLE (CEC) ....................... 11 REVIEW OF NEW EXTRACT ANTS POTENTIALLY APPLICABLE TO THE PROCESSING OF RADIOACTIVE LIQUID WASTES (Summary) P.R. DANESI, International Atomic Energy Agency, Vienna, Austria . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 . . . . . . . . . .
"The rapid increase in radioisotope applications necessitates improved technology for separation and purification of the fission product elements. Electrodialysis techniques employing Permutit anion exchange membrane(3148) were used to separate technetium from zirconium. The method was based upon the stability of the pertechnetate ion in alkaline solutions and the precipitation of zirconium from alkaline solutions. The separation of radiotechnetium and radiozirconium was effected with a two cell electrodialysis unit employing an anion exchange membrane. The solution medium consisted of fluoride and nitrate ions which were made basic with sodium hydroxide. The minimum basicity for a good separation was 0.1N NaOH"--Abstract, leaf ii.