... to evaluate the experimental data and it was found that the non-modified competitive Langmuir isotherm gave the best fit based on the Marquardt percentage standard deviation. Based on the reaction kinetics, the pseudo-second-order reaction model was the best for describing nickel adsorption process, while...

...-transition temperature and the mechanical modulus of the hydrogels. In contrast, further addition of graphene oxide decreases the mechanical properties due to nanoparticle agglomeration. The water diffusion and the swelling mechanism follow pseudo-Fickian and Schott kinetic models, respectively...