Using Origin Pro software, you can easily plot these models in a single graph. Details can be found at
https://www.originlab.com/doc/Tutorials/plotting
Dera Aklilu,
First input the functions for Langmuir, Freundlich and Temkin isotherm models in Origin software using Build Function program. Then input data and plot using non-linear curve fitting one-by-one. All the three plots will come one-after-another.
Thank you.
Dear Nebiat,
let us take for example an adsorption model curve of Langmuir type (1/Ce vs 1/qe);
so you have got a series of primary data points (xi, yi) (i=1 to n), which correspond in this special case to xi= 1/Cei and yi= 1/qei. Rescaling in this case to Ce vs qe is done coordinate wise (xi, yi) ---> (x'i, y'i ) via x'i = 1/xi and y'i = 1/yi.
For the case of Freundlich type data set (ln Ce vs ln qe), you have got the primary data set xi= ln(Cei) and yi= ln(qei); conversion is done via x'i = exp(xi) and y'i = exp(yi).
For the Temkin case (ln Ce vs qe), you have got the primary data set xi= ln(Cei) and yi= qei; conversion is done via x'i = exp(xi) and y'i =yi.
Integrating these three curves into one diagram is apparently not the challenge.
Good luck
