Removal of Ni (Ii) From Aqueous Solution Using Modified Mcm-41 Nano-Adsorbents

In this study, a synthetic and modified ppapmptmsmcm41 nanoadsorbent was used to remove nickel (ii) during a batch process. studying the parameters that were effective on adsorption revealed that the ppapmptmsmcm41 adsorbent was the most effective in the adsorption of nickel (ii) from a standard solution (conc. = 5 mg/l, volume = 100 ml) under the following conditions: ph=8, contact time = 20 min, 6 wt.% of poly paraaminophenol (ppap) ligand, adsorbent mass = 0.3 g, 1 molar hydrochloric acid (to remove nickel from the adsorbent), and nacl salt with a concentration of less than 100 g/l. the results showed that the langmuir isotherm had a higher linear and nonlinear fitting with the experimental data. investigating the kinetic models and mass transfer of this adsorption process showed that the experimental data were in good agreement with the pseudosecondorder kinetic model and the intraparticle mass transfer model. according to thermodynamic studies, this adsorption process is endothermic; its gibbs free energy value is positive such that with an increase in temperature, it goes to lower values, and thus the process progresses spontaneously.