Effect of pressure on aragonite dissolution rates in sea water

Journal Article · Sat Aug 01 04:00:00 EDT 1987 · Geochim. Cosmochim. Acta; (United States)

DOI:https://doi.org/10.1016/0016-7037(87)90266-3· OSTI ID:5062844

Acker, J G; Byrne, R H; Yaakov, S B; Feely, R A; Betzer, P R

Aragonite dissolution in sea water at variable pressure is well described by the equation Rate = kappa'((CO/sub 3//sup 2 -/)s - (CO/sub 3//sup 2 -/))/sup n/ where (CO/sub 3//sup 2 -/)s is the carbonate ion concentration at saturation, (CO/sub 3//sup 2 -/) is the observed carbonate ion concentration, and kappa' and n are empirical constants. Application of the equation Rate = kappa(1-Omega)/sup n/ to descriptions of aragonite dissolution rates is appropriate at constant pressure, temperature and salinity. The authors measurements in sea water at 5/sup 0/C are consistent with the estimate - ..delta.. V = 36.5 cm/sup 3/mole for the volume change accompanying aragonite dissolution. This result is somewhat higher than laboratory estimates, but lower than estimates based on calcite and the difference between calcite and aragonite molar volumes.

• Research Organization: Univ. of South Florida, St. Petersburg (USA)
• OSTI ID: 5062844
• Journal Information: Geochim. Cosmochim. Acta; (United States), Journal Name: Geochim. Cosmochim. Acta; (United States) Vol. 51:8; ISSN GCACA
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580400* -- Geochemistry-- (-1989)
ALKALINE EARTH METAL COMPOUNDS
ARAGONITE
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
CHEMISTRY
DISSOLUTION
GEOCHEMISTRY
HYDROGEN COMPOUNDS
IONS
KINETICS
MINERALS
OXYGEN COMPOUNDS
PRESSURE EFFECTS
REACTION KINETICS
SATURATION
SEAWATER
SOLVENT PROPERTIES
WATER