isogeochem (version 1.1.1)

X_absorption: Relative rates of CO2 absorption reactions

Description

X_absorption() calculates the relative abundance of the DIC species as a function of solution temperature, pH, and salinity.

Usage

X_absorption(temp, pH, S)

Value

Returns a data frame with the relative rates of CO2 absorption reactions:

• Relative rate of CO2 hydration (%).

• Relative rate of CO2 hydroxylation (%).

Arguments

temp

The temperature of the solution (°C).

pH

The pH of the solution.

S

The salinity of the solution (g/kg or ‰).

Details

X_hydration = ((kCO2 / (kCO2 + kOHxKw / aH)) * 100), where

• kCO2 is the rate constant for CO2 hydration from Johnson (1982)

• kOHxKw is the rate constant for CO2 hydroxylation x Kw from Schulz et al. (2006).

• aH is 10^(-pH)

References

Johnson, K. S. (1982). Carbon dioxide hydration and dehydration kinetics in seawater. Limnology and Oceanography, 27(5), 894-855. tools:::Rd_expr_doi("10.4319/lo.1982.27.5.0849")

Schulz, K. G., Riebesell, U., Rost, B., Thoms, S., & Zeebe, R. E. (2006). Determination of the rate constants for the carbon dioxide to bicarbonate inter-conversion in pH-buffered seawater systems. Marine Chemistry, 100(1-2), 53-65. tools:::Rd_expr_doi("10.1016/j.marchem.2005.11.001")

Examples

X_absorption(temp = 25, pH = 7, S = 30)