Nuclear waste remediation

Nuclear fuel/ weapons material processing Nuclear fuel reprocessing Nuclear waste remediation... 

Nucleoside assemblies also show promise for effecting demanding separations of environmentally important cations. A daunting challenge in nuclear waste remediation involves separating radioactive from excess Na" and K ... 

Involving Nuclear Waste Remediation Using Hollow-Fiber Contactors... 

For a metal cation in aqueous solution, hydrolysis occurs when the first-shell water molecule is sufficiently polarized to promote a proton transfer to a second-shell water molecule. The deprotonated species often forms a mixture of new aqua species and precipitates, depending on the pH and other thermodynamic conditions. Therefore, knowledge of the hydrolysis of actinide ions in aqueous solution enhances our ability to accurately predict the chemistry and thermodynamics of nuclear waste remediation. Hydrolysis occurs easily for highly charged actinide ions in solution, since the highly charged ion weakens the O-H bond in the first-shell water molecule, leading to the release of H (aq). 

The Met-Tech separation process is a liquid ion exchange process for the ex situ recovery, separation, and concentration of a wide range of heavy metals. The technology is commercially available and, according to the vendor, has been tested at the pilot scale. According to the vendor, future applications will be in soil remediation, acid mine drainage, and the recycling of spent nuclear waste. 

An electrochemical process for treating low-level nuclear wastes is in the laboratory stage and not yet engineered. It must be understood less as a solution to the hazards of the low-level nuclear products contained in nitrate solution than as a solution for the remediation of the huge quantities of nitrate stored at nuclear waste depositories. The economic viability of the electrochemical process for conversion of nitrates to NH3 and N2 depends on the commercial development of its by-products, NaOH and HN03. 

Buckley, L.P., Vijayan, S., and Wong, C.F., Remediation process technology for ground water. Nuclear Waste Management and Environmental Remediation, in Proc. Int. Conf. Prague, 1993, American Society of Mechanical Engineers, New York, 33, 1993. 

CMPO. CMPO, or octyl(phenyl)-A,A-diisobutylcarbamoylmethylphosphine oxide (see Figure 26), was developed by Horwitz and co-workers as an efficient actinide extractant for use in the TRUEX process in the remediation of acidic nuclear waste solutions. Derivatives of carbamoylphosphine oxides (CMPO) have been studied in nuclear fuel processing schemes involved in transmutation concepts." ... 

Ansari SA, Mohapatra PK, Prabhu DR, Manchanda VK, Evaluation of N,N,N, N -tetraoctyl-3-oxapentane-diamide (TODGA) as a mobile carrier in remediation of nuclear waste using supported liquid membrane. J Membr. Sci. 2007 298, 1-2, 169-174. 

ORLANDO, T., MEISEL, D., Radiation-Induced Processes in Aqueous Suspensions of Nanoparticles and Nanoscale Water Films Relevance to H2 Production in Mixed Waste and Spent Nuclear Fuel , In Nuclear Site Remediation , ELLER, G., HEINEMAN, W. 

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