Computer Science
Scientific paper
Oct 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994gecoa..58.4009l&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 58, Issue 19, pp.4009-4016
Computer Science
1
Scientific paper
The influence of pressure on Gd carbonate complexation has been investigated at t = 25 ° C and P = 1-600 atm . in synthetic seawater using a tributyl phosphate solvent extraction technique. The pressure dependencies of Gd carbonate stability constants appropriate to seawater ( t = 25° C and S = 35) can be described as follows: ; log CO 3 sw 2 ( Gd ) ~- 9.17-1.5 × 10 -3 ( P - 1) ; log CO 3 sw 1 ( Gd ) = 1.58-3.73 × 10 -4 ( P - 1) , where L sw n ( Gd ) = [ GdL n ][ Gd 3+ ] -1 [ L ] T - n , [] and [] T represent free and total concentrations of indicated species (molal scale), and P is pressure in atmospheres. In seawater with a total alkalinity of 2.4 mmol/kg and total CO 2 of 2.1 mmol/kg, the fraction of total Gd present as free Gd 3+ increases by a factor of approximately five or more as pressure increases from 1 atm. to 500 atm. at 2°C. Gadolinium speciation calculations indicate that changes in [CO 3 2- ] T and pH are dominant factors controlling the distribution of Gd species in upper oceanic column (0-1000 m depth). Below 1000 m water depth, the effect of pressure on Gd carbonate complexation exerts a major influence on the distribution of Gd species.
Byrne Robert H.
Lee Jong Hyeon
No associations
LandOfFree
Pressure dependence of gadolinium carbonate complexation in seawater 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 Pressure dependence of gadolinium carbonate complexation in seawater, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure dependence of gadolinium carbonate complexation in seawater will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1070834