Investigations of Heavy Metal Ion Sorption Using Nanocomposites of Iron-Modified Biochar

摘要: Magnetic biochar nanocomposites were obtained by modification of zero-valent iron. The article provides information on the impact contact time, initial Cd(II), Co(II), Zn(II), and Pb(II) ion concentrations, dose sorbents, solution pH temperature adsorption capacity. On basis experiments, it was found that optimum parameters for sorption process are phase time 360 min (after this equilibrium all concentrations is reached), sorbent equal to 5 g/dm3, 5 295 K. values calculated from kinetic models isotherms present best match pseudo second order Langmuir isotherm models. thermodynamic ∆H 0, ∆S 0 ∆G indicate heavy metal ions an exothermic spontaneous as well favoured at lower temperatures, suggesting physical character sorption. nitric acid(V) concentration 0.1 mol/dm3 acidic desorbing agent used regeneration metal-loaded magnetic sorbents. physicochemical properties synthesized composites characterized FTIR, SEM, XRD, XPS TG analyses. point characteristics double layer pHPZC pHIEP designated.