New insights into glyphosate adsorption on modified carbon nanotubes via green synthesis: Statistical physical modeling and steric and energetic interpretations

The present work used a statistical physics approach to new insights into the adsorption of pesticide glyphosate on modified carbon nanotubes via green synthesis (MWCNT/MPNs-Fe). experimental equilibrium curves obtained for this system under pH 4 at temperatures 298, 308, 318, and 328 K were simulated from monolayer, double layer, multilayer models, with 1 2 energies, considering real ideal fluid approaches. Taking account indicators physical meaning parameters, exploring simplifying hypotheses, Hill model energy (M1) presented best prediction data, indicating that occurs by formation monolayer interaction MWCNT/MPNs-Fe are characterized only one energy. Based approach, assess steric aspects system, number molecules adsorbed per site (n), density receptor sites (Nm), capacity saturation (Qsat), concentration half-saturation (W) interpreted. As energetic aspects, (?E) was inferred. combination parameters its evolution temperature magnitude ?E indicated an exothermic process involving mechanism. Finally, showed adsorbent favored interacting metallic iron nanoparticles surface.