Lignocellulosic Materials Used as Biosorbents for the Capture of Nickel (II) in Aqueous Solution

Four lignocellulosic materials (walnut shell, chestnut pine wood and burnt wood) were analyzed as biosorbents to remove nickel ions in aqueous solution. The optimal pH condition was determined. Due this, a range of different pHs (3.0 7.5) tested. adsorption isotherms kinetics established. To plot Langmuir Freundlich isotherms, batch tests made with variable concentrations (5 200 mg L−1). pseudo-first order, pseudo-second Elovich intraparticle diffusion models used describe the kinetics, carried out 25 L−1 solution agitation time varied from 10 1440 min. specific surface area between 3.97 4.85 m2g−1 exception for 1.74 m2g−1. pore size 26.54 nm 5.40 7.33 remaining materials. diffractograms analysis showed that all presented some crystalline domains which completely amorphous. best found be around 5.0. At this higher shells, walnut wood, respectively. All samples fitted model well, R2 0.994 0.998. sorption well described by order equation 0.996 1.00. No significative differences on before after could observed SEM. Finally, tested able