Calculates DOC concentration multiple linear regression model found in 2-METHYLISOBORNEOL AND NATURAL ORGANIC MATTER
ADSORPTION BY POWDERED ACTIVATED CARBON by HYUKJIN CHO (2007).
Assumes all particulate TOC is removed when PAC is removed; therefore TOC = DOC in output.
For a single water use pac_toc; for a dataframe use pac_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.
water must contain DOC or TOC value.
Usage
pac_toc(water, dose, time, type = "bituminous")
pac_toc_df(
df,
input_water = "defined",
output_water = "paced",
pluck_cols = FALSE,
water_prefix = TRUE,
dose = "use_col",
time = "use_col",
type = "use_col"
)Source
See references list at: https://github.com/BrownandCaldwell-Public/tidywater/wiki/References
CHO(2007)
Arguments
- water
Source water object of class "water" created by define_water
- dose
Applied PAC dose (mg/L). Model results are valid for doses concentrations between 5 and 30 mg/L.
- time
Contact time (minutes). Model results are valid for reaction times between 10 and 1440 minutes
- type
Type of PAC applied, either "bituminous", "lignite", "wood".
- df
a data frame containing a water class column, which has already been computed using define_water_df. The df may include columns named for the dose, time, and type
- 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 "paced". Pronouced P.A.ceed (not ideal we know).
- pluck_cols
Extract water slots modified by the function (doc, toc, uv254) 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
pac_toc returns a water class object with updated DOC, TOC, and UV254 slots.
pac_toc_df returns a data frame containing a water class column with updated DOC, TOC, and UV254
concentrations. Optionally, it also adds columns for each of those slots individually.
Details
The function will calculate DOC concentration by PAC adsorption in drinking water treatment. UV254 concentrations are predicted based on a linear relationship with DOC.
Examples
water <- define_water(toc = 2.5, uv254 = .05, doc = 1.5) %>%
pac_toc(dose = 15, time = 50, type = "wood")
#> Warning: Missing value for pH. Carbonate balance will not be calculated.
#> Warning: Missing value for alkalinity. Carbonate balance will not be calculated.
#> 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("raw") %>%
dplyr::mutate(dose = seq(11, 22, 1), PACTime = 30) %>%
pac_toc_df(input_water = "raw", time = PACTime, type = "wood", pluck_cols = TRUE)