Langmuir and Freundlich isotherm model nonlinear fitting in Origin

This tutorial is mainly for early career researchers who are analyzing adsorption data using OriginPro Software. The video shows you how to fit equilibrium isotherm adsorption data to nonlinear Langmuir and Freundlich model in OriginPro.
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[@amakem2425]

why I did not find the same results with the linear and non-linear isotherms

[@Aminulchem]

Thanks. Nonlinear approach is better than linear one.

[@littlenagyal15]

He skipped the frendluich part in between

[@Aminulchem]

Thanks. Please watch this and other videos of this channel. If you have further problems, please let me know & don't forget to subscribe.

[@amakem2425]

Sir, please show the method for calculating error fonctions lik SEE, ∆q

[@Aminulchem]

Thanks for your comment. Could you please elaborate your queries? Do you mean error analysis of adsorption isotherm study?

[@amakem2425]

@@Aminulchem yes

[@Aminulchem]

@@amakem2425 Thanks. Please keep watching and subscribe to my channel. I will make videos on error analysis soon.

[@amakem2425]

Thanks

[@alighasemishirsavar1105]

Hello, how can I fit modified Langmuir or extended Freundlich?

[@Aminulchem]

Thank you so much for your comment. There are several forms of modified Langmuir and Freundlich isotherm model. Could you please send me these equations by comments here in so that I can fit these easily. Please keep watching all videos. If you have further problems please let me know & don't forget to subscribe this channel.

[@Aminulchem]

How to fit Jovanovic isotherm model nonlinear equation: kzbin.info/www/bejne/Z6ianIGYecaVr8k

[@amolucke411]

SIr, N = Qe and C = Ce right? Thank you!

[@Aminulchem]

Yes, it is. How to fit Jovanovic isotherm model nonlinear equation: kzbin.info/www/bejne/Z6ianIGYecaVr8k

[@Aminulchem]

Please watch, like, comments & share: How to calculate Ce and qe in adsorption isotherm study:kzbin.info/www/bejne/qJXNYWhuobKsfrc How to calculate Ct, qt and percent removal in adsorption kinetic study:kzbin.info/www/bejne/Y5Wyg6OFl6iaoqs

[@Aminulchem]

This video has gone VIRAL !!! #shorts #aminulcheminnovation Link: kzbin.info/www/bejne/hpiUmoqFnJ2cpKc

[@enggimran110]

Sir, please shows the method of calculating N & C

[@Aminulchem]

Thank you so much for your interest You can easily calculate C and N using Excel sheet by applying the traditional calculation method. More new important videos coming soon on these topics. Please subscribe to my channel, like, comment, and share my videos.

[@Aminulchem]

Please watch, like, comments & share: How to calculate Ce and qe in adsorption isotherm study:kzbin.info/www/bejne/qJXNYWhuobKsfrc How to calculate Ct, qt and percent removal in adsorption kinetic study:kzbin.info/www/bejne/Y5Wyg6OFl6iaoqs

[@Aminulchem]

How to fit linear Langmuir isotherm using OriginPro: kzbin.info/www/bejne/mWq5ZYuYdquZmdk

[@md.nahidpervez8525]

Thank you sir for your kind help

[@Aminulchem]

Please let me know what type of videos you would like to watch. It will be highly appreciated

[@md.nahidpervez8525]

@@Aminulchem yes professor sure I will let you know Regards Nahid

[@Aminulchem]

@@md.nahidpervez8525 Thank you very much for your appreciation

[@materialsandtechnology8956]

kzbin.info/www/bejne/aWGUiGhupKlobK8

[@Aminulchem]

Please watch new shorts #shorts #aminulcheminnovation kzbin.infozUrfsE941oY?feature=share

[@mohinisingh4929]

Hello, Thanks for sharing your knowledge with us. Could you please tell how to combine non-linear kinetic curves of pseudo-1st, pseudo-2nd, elovich, and bangham in one graph. If you have already made a video kindly share the link. TIA

[@Aminulchem]

Thanks for your comment. Following this video you can draw multi curve in the same plot. If you have further problem please let me know: kzbin.info/www/bejne/q4fPgZh6jr5riaM

[@syedsulaimanhussaini4846]

Thanks for the video, I want to know what is C and N. How to get this data?

[@Aminulchem]

Thanks. Here C = Ce & N = qe Please watch other videos in this playlist where clearly I explained how to calculate Ce & qe

[@Aminulchem]

Next videos coming soon on how to fit linear Langmuir and Freundlich equations easily using OriginPro.

[@amakem2425]

why I did not find the same results with the linear and non-linear isotherms

[@Aminulchem]

@@amakem2425 Thanks. Values will be very close. However. nonlinear fit will give you more accurate results than linear one.

[@enggimran110]

Sir, what's the relationship between qe & qmax in Lagmuir model?

[@Aminulchem]

Thanks for your interest. From this video, it is seen that the non-linear equation of Langmuir qe = qmaxKC/(1+KC), therefore, qe is directly proportional to qmax. i.e., qmax is the saturated level concentration where a monolayer has been formed and qe has achieved a maximum surface coverage. For more information, please visit my recent publications e.g., www.sciencedirect.com/science/article/abs/pii/S2215153218302113

[@Aminulchem]

Please watch important video: kzbin.info/www/bejne/bGnKmn2wntGsmZY

[@atri-chemistry]

When I perform this fitting function on my data it does not fit. What may be the problem ? Is there some prblem with my data points ?

[@Aminulchem]

Thanks. Please open a new project file and paste your data there and perform the fitting. Hopefully you will be OK.

[@sourodiptomodak999]

I have also encountered with the same problem.What you need to do is that you need to build a new fitting function. Watch this video kzbin.info/www/bejne/d6vcmpapg5Krm80

[@atri-chemistry]

Sir kindly make a video on Thomus model fitting in fixed bed parameters using Origin.

[@Aminulchem]

Thanks. These are coming soon & please check out other videos

[@atri-chemistry]

tried multiple time sir. Its not working is there any problem when data points are lesser, In my case there are only six data points

[@hamidboleydei]

Great

[@Aminulchem]

Thank you so much for your appreciation.Please keep watching more videos coming on this related topics.

[@hope2633cu]

You are gift of 21 century Dr Thanks alot 🥰🥰🥰🥰

[@Aminulchem]

Thanks and appreciated.

[@hope2633cu]

@@Aminulchem you are welcime Dr

[@materialsandtechnology8956]

kzbin.info/www/bejne/aWGUiGhupKlobK8

[@researchinnovationforquali4249]

Great one!

[@Aminulchem]

Thank you so much for your nice comment. Please let me know what type of videos you would like to watch.

[@materialsandtechnology8956]

kzbin.info/www/bejne/aWGUiGhupKlobK8

[@chemcolony]

This video is really helpful.

[@rachidatayeb3460]

I tried to plot the langmuir model but the graph is plotted upside down, as if the X axis is up and not down, where is the error? thank you

[@Aminulchem]

Thanks. Probably you have put the values wrongly. So recheck data and plot again. Good luck.

[@aspirantstheworldofbiology9005]

Nice !

[@raynarajacovone3984]

Thank you, Sir!

[@Aminulchem]

You are welcome. Please watch other videos. If you have any query, please let me know & don't forget to subscribe this channel.

[@hasanmia4154]

This is very helpful.

[@asaadhassan3272]

Thanks dear prof. Islam it is very important for us and all scientific authors

[@poetry65]

hello sir i applied recthyperbola fuction on my non-linear langmuir data and it gives a straight line insted of a nin-linear fit. can u please guide me? thanks

[@Aminulchem]

Thanks. You need practice. So repeat fitting in a new origin file let me know how you

[@toosinagbaje8476]

Nice! So straightforward! Kudos!!!

[@Aminulchem]

Thank you so much for your nice comment. Please watch other videos and if you have any queries, feel free to leave comments, and don't forget to subscribe to this channel.

[@Steven-wg3dd]

Dear prof. Islam, thank you so much for soo many information. I just wanted to request you to please make on langmuir and freundlich isotherm on binary mixtures. Thank you sir.

[@Aminulchem]

Thanks. Due to complexity. it will be considered later. Please watch other videos of this channel and don't forget to subscribe to this channel.

[@Steven-wg3dd]

@@Aminulchem I have learned non linear fitting for my research from this channel and it has been very helpful. I owe all my thanks to you sir. I am in the process of communicating my first paper. But I would like to work on binary mixtures in my next work and I'm finding it difficult to determine the isotherm and kinetic models for binary system.

[@carolinemartha8812]

Could you do a video where you show how to fit bi-Langmuir isotherm model with origin? :)

[@Aminulchem]

Thanks. Please write the equation here.

[@carolinemartha8812]

I've already managed to do it on my own with help of your previous tutorials 😊

[@Aminulchem]

@@carolinemartha8812 Thanks. Glad to know that.

[@alanadeduck3589]

Thank you very much for the explanation, but the Freundlich equation is C^(1/n) and in the video it shows C^n. So the value of b in the equation is (1/n), correct?

[@Aminulchem]

I have used classical Freundlich equation but you can use nonclassical form qe = k* Ce ^1/n

[@AS-tp3cz]

Why are nonlinear adsorption model eqs are generally preferred over linear model eqs?

[@Aminulchem]

Thanks. Because isotherm models are originally derived in the nonlinear form. Linear form is mathematical conversion only.

[@mdruhulamin2255]

Thanks for your hard work for us. If any data follows Freuindlich adsorption with better R2 value, what does that mean? Please answer this question as soon as possible.

[@Aminulchem]

Thanks. It means adsorbate adsorb onto the adsorbent by forming monolayer onto heterogeneous surface.

[@mdruhulamin2255]

@@Aminulchem is not there any issues with the multilayer ? Actually my data follows Freuindlich adsorption isotherm instead of Langmuir ?

[@anilkumar-pd4mf]

Sir, how to fit extended Langmuir and freunlich equations for binary mixture adsorption data?

[@Aminulchem]

Thanks. due to complexity, I have not yet published such videos. However, it can be considered later. Please watch all other videos on this channel and don't forget to subscribe.

[@user-un8yn6do5k]

Thank you very much for the explanation

[@Aminulchem]

You are welcome!

[@imranali-fm9sx]

How to prepare sample for maximum adsorption of BSA? Sir waiting for your great response.

[@Aminulchem]

It is difficult to say about this. However, nanomaterials and amorphous materials show predominant adsorption capacity.

[@sourodiptomodak999]

Thanks for the video Sir, I have a doubt, I have applied both linear and non-liner isotherm fitting for my adsorption experimental data. But for non-linear Langmuir, the R2 id coming -10, and for non-linear Freundlich the R2 is proper (0.98).And for linear Langmuir and Freundlich fit the R2=0.97 &0.99 respectively What could be the reason behind that Sir. Please help me out

[@Aminulchem]

Thanks. Please repeat the nonlinear Langmuir isotherm model fitting while watching videos of my channel.

[@sourodiptomodak1994]

@@Aminulchem which videos Sir?

[@Aminulchem]

@@sourodiptomodak1994 This video

[@sourodiptomodak1994]

@@Aminulchem I have already seen and applied the same, after that only i have posted this comment Sir

[@Aminulchem]

@@sourodiptomodak1994 In this case, you can open a new origin project and paste your data there and perform nonlinear Langmuir isotherm model. Hopefully, you will be OK.

[@sumanabalo2984]

Sir I want to know the phosphorous adsoprtion process means the methodology

[@Aminulchem]

Thanks. You can follow the batch adsorption process for P(V) adsorption onto an adsorbent. This channel has several videos on how to carry out adsorption experiments. Please watch these videos and don't forget to subscribe. If you have a specific query please let me know.

[@maheshchandra9519]

All videos are very informative

[@Aminulchem]

So nice of you. Please watch all other videos and don't forget to subscribe to this channel.

[@bibianarocha6726]

So cool! Does this works for Chung Pfost too?

[@Aminulchem]

Thanks. You can try to fit the Chung Pfost model using the same procedure. Please watch other videos and don't forget to subscribe to this important channel.

[@Orian366]

Hello, how do I fit the extended Freundlich model for bivalent adsorption systems?

[@Aminulchem]

Thanks. I have not yet fit this model. Could you please write the equation here.

[@Orian366]

@@Aminulchem qe1=(KF1*Ce1^((1/n1)+x1))/(Ce1^x1+y1*Ce2^z1) where KF1,n1 we take from the fit of the single component Freundlich model and C1,C2 are the equilibrium concentrations of the two components in the bivalent system,and x1,y1,z1 are freundlich bivalent system interaction parameters.Personally i have trouble understanding when i create the equation in origin how to make it take the values of Ce2 (since i only plot the q1,Ce1 with the method shown in the video) and how to put standard values for KF1 and n1. I need to understand fitting in origin , because I couldn't fit my data through solver function in excel.. Any help would be valuable!! I leave here citation for the equation "Adeyi et al.(2019).Simultaneous Adsorption of Cationic Dyes from Binary Solutions by Thiourea-Modified Poly(acrylonitrile-co-acrylic acid).Detailed Isotherm and Kinetic Studies.Materials,12(18),2903.doi.org/10.3390/ma12182903"