Calculates the new water quality (pH, alkalinity, etc) after a specified amount of CO2 is removed (removed as bicarbonate).
The function takes an object of class "water" and a fraction of CO2 removed, then returns a water class object with updated water slots.
For a single water, use decarbonate_ph; to apply the model to a dataframe, use decarbonate_ph_df.
For a single water use chemdose_toc; for a dataframe use chemdose_toc_df.
Use pluck_cols = TRUE to get values from the output water as new dataframe columns.
For most arguments in the _df helper
"use_col" default looks for a column of the same name in the dataframe. The argument can be specified directly in the
function instead or an unquoted column name can be provided.
Usage
decarbonate_ph(water, co2_removed)
decarbonate_ph_df(
df,
input_water = "defined",
output_water = "decarbonated",
pluck_cols = FALSE,
water_prefix = TRUE,
co2_removed = "use_col"
)Arguments
- water
Source water of class "water" created by define_water
- co2_removed
Fraction of CO2 removed
- df
a data frame containing a water class column, which has already been computed using define_water_df. The df may include a column with names for each of the chemicals being dosed.
- input_water
name of the column of water class data to be used as the input for this function. Default is "defined".
- output_water
name of the output column storing updated water class object. Default is "decarbonated".
- pluck_cols
Extract water slots modified by the function (ph, alk) into new numeric columns for easy access. Default to FALSE.
- water_prefix
Append the output_water name to the start of the plucked columns. Default is TRUE.
Value
A water with updated pH/alk/etc.
decarbonate_ph_df returns a data frame containing a water class column with updated ph and alk (and pH dependent ions).
Optionally, it also adds columns for each of those slots individually.
Details
decarbonate_ph uses water@h2co3 to determine the existing CO2 in water, then applies chemdose_ph to match the CO2 removal.
Examples
water <- define_water(ph = 4, temp = 25, alk = 5) %>%
decarbonate_ph(co2_removed = .95)
#> Warning: Major ions missing and neither TDS or conductivity entered. Ideal conditions will be assumed. Ionic strength will be set to NA and activity coefficients in future calculations will be set to 1.
example_df <- water_df %>%
define_water_df() %>%
decarbonate_ph_df(
input_water = "defined", output_water = "decarb",
co2_removed = .95, pluck_cols = TRUE
)