The magnitude of the adsorption capacity (qe) from the literature varies in many folds i.e, from 0.01 to thousands. How to define a newly synthesized material to be a good or bad adsorbent based on the value of qe obtained from experimental data?
I am not sure about your mode of adsorption experiment, if it is a continuous mode of adsorption i.e, fixed bed column study then you must need the application of Thomas model or Yoon-nelson model, for the determination of the value of q which provide you the clear concept about the efficiency or capacity of the adsorbent undoubtedly.
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Whether the polymeric film is a good adsorbent depends on its affinity for the adsorbed material. Although many factors such as the number of pores and diameter are effective, 'the result of the match cannot be determined until it is played'. As someone who is particularly interested in adsorption models, I can say that the experimental isotherm plot (the qe-Ce plot that is not based on any model) gives the best idea. Drawing a curve, qe approaches the saturation point asymptotically. You can find the limit point on the y-axis by eye or using a ruler. There are isotherm models such as Langmuir, Dubinin Radushkevich (D-R), sisps that give the maximum point (qm), but these models are based on some assumptions. The isotherm obtained from the raw experimental data I mentioned at the beginning gives the bare truth.
From the application of mathematical models like the Langmuir model, Freundlich model for batch adsorption as well as the Thomas model, Adam-Bohart model, and Yoon nelson model particularly for fixed-bed column adsorption(continuous mode) you can easily know the efficiency or adsorption capacity of your fabricated adsorbent indeed.