Extraction Kinetics of Uranium(VI) with Polyurethane Foam

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Dong-Hwang Chen¹  Mu-Chang Shieh²  Ching-Tsven Huang²  Shius-Dong Huang¹  Ting-Chia Huang¹ 

[1] Department of Chemical Engineering, National Cheng Kung University;Institute of Nuclear Energy Research

关键词: Extraction;    Kinetics;    Polyurethane Foam;    Uranium;    Two-stage Rate Model;   

DOI  :  10.1252/jcej.26.361

来源: Maruzen Company Ltd

【 摘 要 】

References(15)Cited-By(1)The extraction kinetics of uranium(VI) from aqueous nitrate solution with polyether-based polyurethane foam was investigated in a batch reactor with automatic squeezing. The extraction curves of uranium(VI) concentration in solution vs. extraction time exhibited a rather rapid exponential decay within the first few minutes, followed by a slower exponential decay during the remaining period. This phenomenon can be attributed to the presence of two-phase structure, hard segment domains and soft segment matrix in the polyurethane foam. A two-stage rate model expressed by a superposition of two exponential curves was proposed, according to which the experimental data were fitted by an optimization method. The extraction rate of uranium(VI) was also found to increase with increasing temperature, nitrate concentration, and hydration of the cation of nitrate salt.

【 授权许可】

Unknown