I am working on color removal from wastewater using AOP and found best fit with exponential decay function 2 and 3 of Origin pro 8.5 . With some literature review some authors suggested the exponential decay function belongs to pseudo first order kinetics model and some suggested second order kinetics model.
Hi Umair, the pseudo-first order model is applied to systems whose driving force model is linear, and the adsorption rate is related to the difference in the saturation concentration and the number of active adsorbent sites, indicating that the overall adsorption rate is proportional to the initial strength of the process. The pseudo-second order model, on the other hand, suggests that the control of the speed mechanism is controlled by chemical adsorption, where the global adsorption rate is the square of the initial strength of the process, and in it, the molecules join the adsorbent surface. Hope this helps.
Hello,
I hope the following information is useful.
Lin, J., Wang, L. Comparison between linear and non-linear forms of pseudo-first-order and pseudo-second-order adsorption kinetic models for the removal of methylene blue by activated carbon. Front. Environ. Sci. Eng. China 3, 320–324 (2009). https://doi.org/10.1007/s11783-009-0030-7
Hubbe, M. A., Azizian, S., and Douven, S. (2019). "Implications of apparent pseudo-second-order adsorption kinetics onto cellulosic materials: A review," BioRes. 14 (3), 7582-7626.
Today s. (2004), Citation review of Lagergren kinetic rate equation on adsorption reactions. Scientometrics, 59 (1), 171-177.
Ho, Y.S. (2006), Review of second-order models for adsorption systems. Journal of Hazardous Materials, 136 (3), 681-689.
Regards.
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