STUDY ON THE EXTRACTION AND COMBINATION WITH UV-VIS METHOD TO DETERMINE URANI IN THE GYPSUM WASTE

Abstract

In this paper, present the results of the research on the determination and separation urani in gyps, has
investigated the optimal conditions for decomposition of 100 g gyps samples requiring 400 ml of H2SO4
30%. incubate sample for 150 min at temperature of 70 - 90oC, the neutralizing solution to precipitate
is NH3 15%, the calcined precipitation temperature at 400oC reaches about 50% urani content, after
treatment through urani ion exchange column, precipitate reached over 80% urani, same time build on
the extraction, handling and analysis urani content in gyps sample, urani content was 0.74 mg/g, with
slight variability, below 5%.
Keywords: urani, extraction, analysis, gyps