Diffusion in Multicomponent Aqueous Systems

Lane, J. E.; Kirkaldy, J. S.

doi:10.1139/v66-064

Cited by 7 publications

(4 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Diffusion of ions and molecules in simple binary and multicomponent aqueous solutions has been studied both theoretically and experimentally over the years [e.g., Anderson and Graf , 1976; Ben‐Yaakov , 1972; Boudreau et al , 2004; Crank , 1975; Dunlop , 1964; Felmy and Weare , 1991a, 1991b; Lane and Kirkaldy , 1966; Longsworth et al , 1945; Miller , 1966, 1967a, 1967b; Miller et al , 2007; Onsager and Fuoss , 1932; Poisson and Papaud , 1983; Rard et al , 2009; Vinograd and McBain , 1941; Wendt , 1965; Wu et al , 1994]. With regard to diagenetic systems, Boudreau [1997, chap.…”

Section: Modeling the Effects Of Long‐term Diagenesismentioning

confidence: 99%

Isotopic approaches for quantifying the rates of marine burial diagenesis

Fantle¹,

Maher²,

DePaolo³

2010

Rev. Geophys.

View full text Add to dashboard Cite

[1] Diagenetic reactions in marine sediments have the potential to alter geochemical proxy records and affect the global carbon cycle over tens of thousands to millions of years. This article describes advances in the use of Ca, Sr, and U series isotopes in constraining carbonate recrystallization and silicate dissolution rates in marine systems. We specifically focus on recent efforts that interpret isotope variability in marine pore fluids using reactive transport models of varying complexity. Such studies suggest that calcite recrystallization rates are significant over time scales <1 Myr, approaching exchange rates of 0.4-1 Myr −1 . Over longer time scales, isotopic data point to continued exchange between calcite and coexisting pore fluid, though at lower rates than in young sediments. Extrapolating these recrystallization rates over tens of millions of years, we quantify the extent to which geochemical climate proxies such as Mg/Ca in calcite can be altered diagenetically. In some cases, such diagenetic effects significantly affect the interpretation of long-term climatic trends, as well as determinations of absolute paleotemperatures. Silicate dissolution rates in siliclastic marine sediments appear to be similar in magnitude to dissolution rates in terrestrial environments (10 −7 -10 −6 yr −1 ). Such estimates suggest that silicate weathering in marine sediments may play an important role in the carbon cycle, at least over time scales approaching 400-500 kyr.Citation: Fantle, M. S., K. M. Maher, and D. J. DePaolo (2010), Isotopic approaches for quantifying the rates of marine burial diagenesis, Rev. Geophys., 48, RG3002,

show abstract

Section: Modeling the Effects Of Long‐term Diagenesismentioning

confidence: 99%

Isotopic approaches for quantifying the rates of marine burial diagenesis

Fantle¹,

Maher²,

DePaolo³

2010

Rev. Geophys.

View full text Add to dashboard Cite

show abstract

“…2. Component fluxes due to this mechanism, denoted by the superscript I, are now evaluated from the transition-state theory of classical kinetics (8,9).…”

Section: Phenomenological Theorymentioning

confidence: 99%

“…In the series of dilute aqueous ionic solutions studied by Dunlop and Gosting (6,7) both effects are important, the correlation effects being attributable to differing intrinsic ion mobilities and ionic sizes (8,9).…”

Section: Introductionmentioning

confidence: 99%

“…J 2 11 = -J~I I = -~~1 1 mechanisms previously ignored.the calculatioil to include the two low probability[dl] Jl"' = -$'{dp1 + dpv -dp, -dp3)Term by term comparison of these equations with[42] J,"' = J,"' = -J1lV = -$'{dpl + dp3 -dp, -the applicability of constraints[9],[12],[45] JI' =-R T C ,~C ,~ + c,'c~' + C ,~C ,~ a~ and [I 31 is readily verified. These coefficients are now to be combined with the diffusion equations [22] and It is to be noted that mechanisms I and I1 explicitly [23].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Uphill diffusion associated with a flux of extrinsic vacancies

Young¹,

Delamotte²,

Kirkaldy³

1979

Can. J. Phys.

Self Cite

View full text Add to dashboard Cite

A phenomenological scheme and a corresponding kinetic model are developed to demonstrate the interactions between cation and extrinsic vacancy fluxes in ionic solutions. The solution examined consists of two monovalent species and one divalent species (with matching extrinsic vacancies) on the cation sublattice. It is demonstrated that the monovalent cations always tend to flow up the vzlcancy (or divalent cation) gradient and, in the event that a monovalent species is initially uniformly distributed, to subsequently flow up its own gradient. The magnitude of the tin-mixing process is comparable to that obtained through thermodynz~mic interactions in metallic solutions.On developpe un schema phenomenologique et un modele cinetique correspondant, pour expliquer les interactions entre les flux de cations et de lacunes extrinskques dans les solutions ioniqties. La solution consideree comporte deux especes monovalentes et une espece bivalente (avec les vacances extrinseques correspondantes) sur le sous-reseau des cations. On demontre que les cations monovalents tendent toujours h remonter le gradient des lacunes (ou des cations bivz~lents) et, lorsqu'il arrive qu'une espttce monovalente est distributee initialement d'une faqon uniforme, i i remonter ensuite son propre gradient. L'importance du processus de non-melange est comparable a celle qu'on obtient en considerant les interactions thermodynamiques dans des solutions metalliaues.

show abstract

On the kinetics of coupled sulfur and oxygen transfer through an ionic diaphragm

Jin

1970

Metall Trans

View full text Add to dashboard Cite

Diffusion in Multicomponent Aqueous Systems

Cited by 7 publications

References 16 publications

Isotopic approaches for quantifying the rates of marine burial diagenesis

Isotopic approaches for quantifying the rates of marine burial diagenesis

Uphill diffusion associated with a flux of extrinsic vacancies

On the kinetics of coupled sulfur and oxygen transfer through an ionic diaphragm

Contact Info

Product

Resources

About