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3 edition of A study of some actinide hydrolysis products using ultrafiltration found in the catalog.

A study of some actinide hydrolysis products using ultrafiltration

J. D. Wilkins

A study of some actinide hydrolysis products using ultrafiltration

by J. D. Wilkins

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Published by United Kingdom Atomic Energy Authority, Chemistry Division in Harwell .
Written in English


Edition Notes

StatementJ.D. Wilkins and S.J. Wisbey.
ContributionsWisbey, S. J., United Kingdom Atomic Energy Authority. Chemistry Division.
ID Numbers
Open LibraryOL21640331M
ISBN 100705813320
OCLC/WorldCa59256984

@article{osti_, title = {Applications of ultrafiltration in biotechnology}, author = {O'Sullivan, T.J. and Beaton, N.C. and Epstein, A.C. and Korchin, S.R.}, abstractNote = {This article describes a membrane separation process which has replaced or complemented some of the traditional processing methods, and has contributed to the making of some new products. The experimental results show that the quality of aquatic products processing wastewater can attain to the national requirements of the first grade of integrated wastewater discharge standard (GB - ).When wastewater temperature was 20°C, HRT was over 6 h and influent COD, BOD5 and SS was – mg/L, – mg/L and –

UNESCO – EOLSS SAMPLE CHAPTERS RADIOCHEMISTRY AND NUCLEAR CHEMISTRY – Vol. II - Chemistry of the Actinide Elements - Norman M. Edelstein, Lester R. Morss ©Encyclopedia of Life Support Systems (EOLSS) The nuclide Pu is an important heat source for terrestrial and extraterrestrial applications. The heat is generated by its nuclear alpha . Production of protein isolate and hydrolysate M. oleifera. Seed protein isolate (ISO) was obtained using a previously described method with some modifications. MSM was dispersed in M NaOH (, w/v), mixed for 1 h and centrifuged at room temperature (xg for 1 h). The supernatant was adjusted to pH 5 and left in the refrigerator at 4 °C for 8–12 h.

The solubility and hydrolysis of Th(IV), U(IV), Np(IV), and Pu(IV) are critically reviewed and a comprehensive set of thermodynamic constants at I = 0 and 25°C is presented. The. The solubility and aqueous speciation of actinides is of particular interest for their geochemical model-ing in natural aquatic systems with regard to the safety of nuclear waste disposal. Among numerous reactions that govern the chemical behavior of trace actinides, the knowledge of hydrolysis and car-bonate complexation is of highest priority.


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A study of some actinide hydrolysis products using ultrafiltration by J. D. Wilkins Download PDF EPUB FB2

Spectroscopic study of acetohydroxamic acid (AHA) hydrolysis in the presence of europium. Implications in the extraction system studies for lanthanide and actinide separation † Iván Sánchez-García, * ab Laura J.

Bonales, a Hitos Galán, a Jose Manuel Perlado b Author: Iván Sánchez-García, Laura J. Bonales, Hitos Galán, Jose Manuel Perlado, Joaquín Cobos. According to some authors (González-Tello et al.,Guerard et al., ), this reduction can be explained by three main factors: (i) the lower concentration of peptide bonds available for cleavage by the protease, (ii) the possible enzyme inhibition caused by some products resulting from the hydrolysis and (iii) the enzyme denaturation or Cited by:   Hydrolysis of trivalent actinides and lanthanides has been extensively studied over the last few decades using different methods such as solvent ex- traction, ~ pH titration,~ electrophoresis, electromigration, solubility and several other methods) ~ 1t is observed from the published data (Table 1) that the values of the first hydrolysis con Cited by: A.-S.

Sandberg, in Functional Foods (Second Edition), Pea protein hydrolysates. Protein hydrolysates are of interest for the food industry because of their beneficial effects for the food products and for human health.

Enzymatic hydrolysis is preferred because they are milder and the nature and extent of the treatment can be controlled due to inherent specificity of. A study was conducted to investigate actinide colloids and particles of environmental concern.

M and were removed by ultrafiltration using 1 nm ultrafilters. estimated hydrolysis. The ultrafiltration system (Minitan™ System) and membranes for the fractionations of each hydrolysate were purchased from Millipore.

Preparation of cod frame protein hydrolysate (CFPH) The hydrolysis of cod frame protein was performed according to a previous report. To give an enzyme/substrate ratio of 1/ (w/w), 1% substrate (dry.

Formation of complex hydrolysis products for some actinides makes this system rather complicated and explains the scarcity of experimental as well as rds understanding a The current work presents a first step towtheoretical work in that cated ternary systems of uranyl-hydroxo-humate at moderately acidic conditions, by.

Coordination and Hydrolysis of Plutonium Ions in Aqueous Solution Using Car–Parrinello Molecular Dynamics Free Energy Simulations. The Journal of Physical Chemistry A(47), DOI: /jp Christopher L. Webster, Joseph W. Ziller, and William J. Evans. As shown in Fig. 3, the solubility was markedly improved by a limited enzymatic hydrolysis followed by separation of the products by ultrafiltration.

The pH-dependent solubility of the control sample showed a typical bell shape. Furthermore, enzymatic hydrolysis shifted the pI from 6–7 to 5.

Actinide binding to colloidal particles of different nature was studied under oxic and anoxic conditions of an underground nuclear waste disposal site using successive micro- and ultrafiltration.

The high total Np concentration ([Np](tot) similar to 2 x 10(-3) M) led to the precipitation of solid phases in some of the samples. the study of actinide ions in the +IV oxidation state.

Actinide Speciation in Environment and Their Separation Using Functionalized Nanomaterials and Nanocomposites. , DOI: /_ Ingmar Persson. Coordination Chemistry of Metal Ions in Some Oxygen Donor Solvents.DOI: /B   Enzymatic hydrolysis is a suitable way to produce bioactive peptides without losing nutritional value (He et al., ).

Additionally, the use of enzymatic hydrolysis of protein can help to control the end product, thereby producing. Knope KE, Soderholm L (b) Solution and solid-state structural chemistry of actinide hydrates and their hydrolysis and condensation products.

Chem Rev – CrossRef Google Scholar Knope KE, Wilson RE, Vasiliu M, Dixon DA, Soderholm L () Thorium(IV) molecular clusters with hexanuclear Th core. Water, in its subcritical state, can be used as both a solvent and reactant for the hydrolysis of triglycerides.

In this study, soybean, linseed, and coconut oils were successfully and reproducibly hydrolyzed to free fatty acids with water at a density of g/mL and temperatures of − °C. Under these conditions the reaction proceeds quickly, with conversion of greater than 97%. The hydrolysis and interaction of Np(IV) and Pu(IV) with orffiosilicic acid, Si(OH)(4), were studied in M ionic strength aqueous solutions.

Request PDF | Uranium(IV) Hydrolysis Constants and Solubility Product of 2O(am) | The solubility of UO2xH2O was examined in dilute. hydrolysis data [Choppin and MathurFugerKraus ] are primary references to colloid studies.

Some stability constants of various hydrolysis reactions of different actinide ions are summarized in the literature [Kraus A possible model for a product of hydrolysis undergoing polymerization may. @article{osti_, title = {Hydrolysis of lanthanide and actinide carbides: a survey of recent literature}, author = {Griess, Jr., J.

C.}, abstractNote = {Although some of the carbides of the lanthanide and actinide elements have been known for a long time, it is only during relatively recent years that the carbides of these two groups of elements have been well characterized. Hydrolysis in base reactions is very similar to hydrolysis in acid reactions, except now the water acts as a proton donor and becomes a hydroxide anion.

In the present study we evaluated trends in the bond distances and dissociation enthalpies of actinide oxides AnO and AnO2 (An = Th–Lr) on the basis of consistent computed data obtained by using density functional theory in conjunction with relativistic small-core pseudopotentials.

Computations were carried out on AnO (An = Th–Lr) and AnO2 (An = Np, Pu, Bk–Lr) species. The hydrolysis of aspirin is described in the reaction below, where aspirin forms the degradation products of salicylic acid and acetic acid.

This degradation reaction is typically a second order reaction, but in this experiment the reaction behaves as a first order reaction as ln[ASA] decreases with time as shown in Figure 2.The rate constants and the activation parameters for the exchange between water solvent and [U(H2O)10]4+ and [UF(H2O)9]3+, and a lower limit for the rate constant at room temperature for [Th(H2O)10]4+, were determined by 17O NMR spectroscopy in the temperature range − K.

The experiments were made at different constant hydrogen ion concentrations, which .