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[en] Washing of uranium gel resulted from gelation using ammonia underconcentration of 1, 2.5, 3, 4 and 5 % has been carried out. The sol wasprepared by reacting uranyl nitrate, urea and HMTA at 5 oC. The resulted solwas dropped into a column containing paraffin oil at temperature of 95 oC.The resulted gel color was orange. It was simmered in a 2.5 % ammoniasolution for 24 hours. After that, the gel was washed in an ammonia solutionunder a concentration variation. The best washing process occurred at ammoniaconcentration of 2.5 % with most absorbed ion nitrate, i.e. 292.2 ppm. Theresulted true density using N2 was about 8.3 - 8.6 g/ml, specific surfacearea using multi point BET was about 1.5 - 3.1 m2/g, average pore radius was22.27 -41.22 A and total pore volume was 3.55 x 10-3 cc/g. (author)
Source
Sukarsono, R.; Karmanto, Eko-Edy; Suradjijo, Ganang (National Nuclear Energy Agency, Yogyakarta (Indonesia)) (eds.); Centre for Research and Development of Advanced Technology, National Nuclear Energy Agency, Yogyakarta (Indonesia); 404 p; ISSN 0216-3128; 
; 2000; p. 383-385; Scientific Meeting and Presentation on Basic Research in Nuclear Science and Technology; Pertemuan dan Presentasi Ilmiah Penelitian Dasar Ilmu Pengetahuan danTeknologi Nuklir; Yogyakarta (Indonesia); 25-26 Jul 2000; Also available from Center for Development of Nuclear Informatics,National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560923, PO BOX4274, Jakarta (ID); 3 refs.; 2 tabs.; 1 fig.
; 2000; p. 383-385; Scientific Meeting and Presentation on Basic Research in Nuclear Science and Technology; Pertemuan dan Presentasi Ilmiah Penelitian Dasar Ilmu Pengetahuan danTeknologi Nuklir; Yogyakarta (Indonesia); 25-26 Jul 2000; Also available from Center for Development of Nuclear Informatics,National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560923, PO BOX4274, Jakarta (ID); 3 refs.; 2 tabs.; 1 fig.