SHAKTI (version 0.1.0)

LnKd: Dimensionless Distribution Coefficient

Description

This function computes the natural logarithm of dimensionless distribution coefficient (Kd) from adsorption equilibrium data across temperatures, and non-temperature treatments, if any. This function prepares the foundational input required for thermodynamic parameter analysis.

Usage

LnKd(V, m, MW.Ad, M.Ad, Non_T_trt, T_trt, Rep, IGC, Ce)

Value

• qe_i: Absorbed amount in milligram per kg

• Kd_i: Distribution coefficient

• lnKd_i: Natural logarithm of Kd

• Mean_lnkd: Average of lnKd

Arguments

V

Volumn of water in litre

m

Mass of the adsorbent in gram

MW.Ad

Molar weight of the adsorbate in gram per mole

M.Ad

Molarity of the solvent in mole per litre(55.5 for water)

Non_T_trt

Non-temperature treatment

T_trt

Temperature treatment

Rep

Replication

IGC

Initial graded concentrations of the adsorbate in milligram per litre

Ce

Equilibrium concentration of the adsorbate in milligram per litre

References

Roy, A., Manjaiah, K. M., Datta, S. P., Rakshit, D., Barman, M., Ray, P., Golui, D., Raza, M. B., Tigga, P., Mondal, S., Vishwanath, Meena, S., & Meena, P. (2025). Effect of Low-Molecular-Weight Organic Acids and Silicon on Arsenic Adsorption and Desorption in a Paddy Soil of Bengal Delta Plain: Insights from Thermodynamics and Equilibrium Modeling. Water, Air, & Soil Pollution, 236(6), 344. https://doi.org/10.1007/s11270-025-07963-7

Examples

V <- 0.02  # in litre
m <- 2 # in gram
MW.Ad <- 75
M.Ad <- 55.5
Non_T_trt <- c(0,0,0,0,0,0,1,1,1,1,1,1)
T_trt <- c(1,1,1,2,2,2,1,1,1,2,2,2)
Rep <- c(1,2,3,1,2,3,1,2,3,1,2,3)
IGC <- c(2,4)
Ce2 <- c(0.030, 0.031, 0.032, 0.033, 0.034, 0.035, 0.030, 0.031, 0.032, 0.033, 0.034, 0.035)
Ce4 <- c(0.030, 0.031, 0.032, 0.033, 0.034, 0.035, 0.030, 0.031, 0.032, 0.033, 0.034, 0.035)
Ce <- data.frame(Ce2, Ce4)
my.LnKd<- LnKd(V, m, MW.Ad, M.Ad, Non_T_trt, T_trt, Rep, IGC, Ce)