Measuring the ratio of aqueous diffusion coefficients between 6 Li + Cl - and 7 Li + Cr - by osmometry

Details Measuring the ratio of aqueous diffusion coefficients between 6 Li + Cl - and 7 Li + Cr - by osmometry Measuring the ratio of aqueous diffusion coefficients between 6 Li + Cl - and 7 Li + Cr - by osmometry

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992gecoa..56.3781f&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 56, Issue 10, pp.3781-3789

Computer Science

8

Scientific paper

Osmotic equilibrium is a singular occurrence in the evolution of an osmotic cell because at this event the net solution flux is zero such that . At this juncture, the diffusion coefficient of the solute through the membrane ( ) equals the solute flux ( J s ) divided by the osmotic pressure ( ). Because the solute permeability coefficient ( ) is related to the Fickian diffusion coefficient ( D ) through the gas constant, temperature, and the membrane's thickness and tortuosity, the ratio of values for individual isotopic species equals the ratio of D values for the same isotopic components. A 0.9450 molal LiCl solution was placed within sealed dialysis tubing and osmoted against a kilogram of deionized water at 22°C. Osmotic equilibrium occurred at 164 ± 10 min. The ratio of 6 Li + Cl - / 7 Li + Cl - was measured to be 1.011 ± 0.003--a value close to the square root of the mass ratio between 7 LiCl and 6 LiCl (= 1.012) as calculated by Graham's Law. The measured diffusion coefficient ratio was used to predict the degree of hyperfiltration-induced fractionation of Li isotopes as a function of membrane ideality. When a membrane's exceeds 0.95 (as is likely for low-porosity shales) the 6 Li / 7 Li ratio on the high-pressure side of the membrane can theoretically vary by more than 0.0017.

Affiliated with

Also associated with

No associations

Rating

Measuring the ratio of aqueous diffusion coefficients between 6 Li + Cl - and 7 Li + Cr - by osmometry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Measuring the ratio of aqueous diffusion coefficients between 6 Li + Cl - and 7 Li + Cr - by osmometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measuring the ratio of aqueous diffusion coefficients between 6 Li + Cl - and 7 Li + Cr - by osmometry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1869936