The dissociation kinetics of dissolved metal–humate complexes
Literature Information
Samantha J. King, Peter Warwick, Anthony Hall, Nicholas D. Bryan
The dissociation of Eu(III)–HS (HS = fulvic or humic acid) complexes has been investigated using cation exchange resins to separate ‘free’ from ‘complexed ’ Eu(III). With relatively small amounts of resin, the amount of complexed Eu(III) remaining after any resin contact time is calculated using four components to describe the Eu(III) binding iz.: an easily exchangeable fraction of Eu (calculated using a single equilibrium constant) and three kinetically hindered fractions (calculated from three consecutive pseudo-first order rate expressions). With larger amounts of resin, the easily exchangeable Eu(III) becomes negligible. The slowest dissociation step, which probably is the most important with regard to radionuclide transport, has a half life of ≈200 h. The fraction of Eu(III) in the kinetically hindered sites increased with metal–HS contact time, pH, FA concentration and the degree of humification (HA>FA) but competing cations (Ca, Mg, Al or Fe) had little effect. Information on the effect of temperature on the rate constant for the slowest dissociation step was used to calculate the activation energy barrier.
Recommended Journals
Related Literature
Aqueous-only, pH-induced nanoassembly of dual pKa-driven contraphilic block copolymers
Nam S. Lee, Yali Li, C. Marcus Ruda, Karen L. Wooley
DOI: 10.1039/B810934F
Orthogonal or simultaneous use of disulfide and hydrazone exchange in dynamic covalent chemistry in aqueous solution
Zaida Rodriguez-Docampo
DOI: 10.1039/B808725C
Developing DNA tiles for oligonucleotide hybridization assay with higher accuracy and efficiency
Yonggang Ke, Jeanette Nangreave, Hao Yan, Stuart Lindsay, Yan Liu
DOI: 10.1039/B811332G
Internal amide-triggered cycloaromatization of maduropeptin-like nine-membered enediyne
Yutaro Norizuki, Kazuo Komano, Itaru Sato, Masahiro Hirama
DOI: 10.1039/B811355F
Enantiomerically purebicyclo[3.3.1]nona-2,6-diene as the sole source of enantioselectivity in BIPHEP-Rh asymmetric hydrogenation
Tharmalingam Punniyamurthy, Monika Mayr, Alexander S. Dorofeev, Carole J. R. Bataille, Silvia Gosiewska, Bao Nguyen, Andrew R. Cowley, John M. Brown
DOI: 10.1039/B807669C
Crystallographic characterization and identification of a minor isomer of C84fullerene
Lars Epple, Konstantin Amsharov, Kalin Simeonov, Ina Dix, Martin Jansen
DOI: 10.1039/B811872H
Fabrication of chiral silver nanoparticles and chiral nanoparticulate film via organogel
Yuangang Li, Minghua Liu
DOI: 10.1039/B812567H
Synthesis of 3-hydroxy-1-alkenylboronates viaphosphine stabilized borylzirconacyclopropenes‡
Alina Botvinik, Abraham Rubinstein, Morris Srebnik
DOI: 10.1039/B811287H
A general precipitation strategy for large-scale synthesis of molybdate nanostructures
Cheng Peng, Lian Gao, Songwang Yang, Jing Sun
DOI: 10.1039/B812033A
Non-hydrolytic synthesis of mesoporous silica–titania catalysts for the mild oxidation of sulfur compounds with hydrogen peroxide
P. Hubert Mutin, Emil Dumitriu, François Fajula, André Vioux, Vasile Hulea
DOI: 10.1039/B811668G
You might also like
What are the main uses of 1H-Indazole-6-carbonitrile (CAS: 141290-59-7)?
1H-Indazole-6-carbonitrile finds applications in pharmaceuticals, where it serve...
How should waste containing Dioctyl (2E)-2-butenedioate (CAS: 2997-85-5) be handled?
Waste containing Dioctyl (2E)-2-butenedioate (CAS: 2997-85-5) should be collecte...
What industries use Sodium [(1,2-benzoxazol-3-ylmethyl)sulfonyl]azanide (CAS: 68291-98-5)?
Sodium [(1,2-benzoxazol-3-ylmethyl)sulfonyl]azanide is primarily used in pharmac...
Are there alternatives to Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,6-pyridinedicarboxylate (CAS: 741709-66-0) in synthesis?
Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,6-pyridinedicarboxyla...
How should waste containing 2-Fluoro-6-hydrazinopyridine (CAS: 80714-39-2) be handled?
Waste containing 2-Fluoro-6-hydrazinopyridine (CAS: 80714-39-2) should be manage...
What is 6-Formyl-2-pyridinecarboxylic acid (CAS: 499214-11-8)?
6-Formyl-2-pyridinecarboxylic acid is an organic compound with the molecular for...
What is the market or research trend for 3-(3,4-dimethoxyphenyl)-2,5-dimethyl-N-(2-morpholin-4-ylethyl)pyrazolo[1,5-a]pyrimidin-7-amine (CAS: 900874-91-1)?
Research trends for this compound indicate a focus on its potential applications...
How is 9H-Tribenzo[b,d,f]azepine (CAS: 29875-73-8) typically synthesized?
9H-Tribenzo[b,d,f]azepine is typically synthesized via a multi-step process invo...
How is 1-Cyclopropyl-7-ethoxy-6-fluoro-8-methoxy-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid (CAS: 1797982-51-4) typically synthesized?
1-Cyclopropyl-7-ethoxy-6-fluoro-8-methoxy-4-oxo-1,4-dihydro-3-quinolinecarboxyli...
How should waste containing Methyl 3-oxo-1,2,3,4-tetrahydro-6-quinoxalinecarboxylate (CAS: 671820-52-3) be handled?
Waste containing Methyl 3-oxo-1,2,3,4-tetrahydro-6-quinoxalinecarboxylate (CAS: ...
Source Journal
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.










![9H-Fluoren-9-ylmethyl {15-[(2,5-dioxo-1-pyrrolidinyl)oxy]-15-oxo-3,6,9,12-tetraoxapentadec-1-yl}carbamate structure 9H-Fluoren-9-ylmethyl {15-[(2,5-dioxo-1-pyrrolidinyl)oxy]-15-oxo-3,6,9,12-tetraoxapentadec-1-yl}carbamate structure](https://static.chemtradehub.com/structs/131/1314378-14-7-4316.webp)



